Sign in with
Sign up | Sign in
Your question

Recently my AMD Phenom II X4 945 3.0Ghz runs at 800mhz

Last response: in CPUs
Share
April 3, 2012 12:51:26 AM

ASUS M4A79T Deluxe mobo
AMD Phenom II X4 945 3.0ghz
4Gb (2x2gb) Corsair XM3 1333mhz
Sapphire ATI HD 4870 1gb


For the last 2 and a half years, this computer was running top notch. I had it running at 3.2Ghz and everything was good. In the recent month that my computer is running MUCH slower than usual and my games lagged like hell. So I did a fresh install of Win7 64 and that didn't help. Then I saw that the windows experience index set my processor score at 3.7 where it use to be over 7.0. I look more into it and found out that my CPU is actually running at 800mhz instead of the 3.0GHz it use to run at. It turns out that the multiplier is stuck at 4x (200 x4) instead of 15x. I went to bios and made sure the Quiet N Cool is disabled but it didnt help. Also, I ran Prime95 and that didnt get the speed up to where it should be. I tried ASUS overdrive and set the multiplier to 15X but it reset back to 4x after I hit apply. I also changed the setting in BIOS to 200 x15 but that also doesnt help. The processor is supported in that version of BIOS im using because... first of all, it worked for 2 and a half years. The BIOS sees and recongnizes the processor and clock however its all messed up in windows. I also tried updating the BIOS but that actually gave more trouble than what its worth. The new BIOS caused it not to POST unless i clear the CMOS everytime I restart the computer. I had to downgrade the BIOS back to about the same BIOS I had it for it to POST correctly. And for the record, the new BIOS didnt help the clock either. I see alot of people had this problem with this processor when it was introduced back in 09 but a BIOS update fixed it for them.

Is there anything I can do to fixed this? Was there a windows update that screwed with my CPU clock? Or is my CPU screwed? I already formated the HD twice now and I am about to do it a third time because I am thinking maybe its a windows update. I am goingto run CPU-Z after a fresh install to see the clock speed without updates. I was hoping to squeeze another 2 years out of this computer before I have to build a new one.
a b à CPUs
April 3, 2012 1:08:12 AM

It is a possibility that the temp sensors in the CPU have failed causing the BIOS to apply thermal throttling ?

Idk try resetting BIOS the power off and pull battery for a few hours.
I know people say all you need is 15 min but idk it has worked for me before to fix mucked up BIOS.

When Re-booting re flash the BIOS from the BIOS off of a flash.
April 3, 2012 1:21:51 AM

Ill give that a try... should I reflash the BIOS with the newest that doesnt POST correctly? or should I flash it with the same one that is working correctly?

My CPU is running at 35oC right now. The MB is at 36oC. I got a hugh aftermarket heatsink/fan on the CPU. Also I need to note that the Vcore is only 1.02V. I tried to raise it up but I just wont work so I just left everything as "Auto" in BIOS. Ill try poping the battery out, and clear CMOS using the jumper when I go to bed tonight and leave it that way all night. Hope it helps.
Related resources
a b à CPUs
April 3, 2012 1:34:27 AM

I would try the version used that ran the PC fine for the longest time. If for some odd reason that doesn't work repeat the process with the newest release. If neither work i think we need to begin looking more in the direction of hardware issues.
April 3, 2012 1:51:04 AM

Ok sounds like worth a try. Ill do it before I pass out for the night. Ill repost in the morning.

Thanks for the help
April 3, 2012 10:27:08 AM

I left the battery out for 6 hours and reflashed the bios but it is still not working. I am still stuck at 800mhz. I manually set in BIOS and AMD OD the clock (200), multiplier (15x), and voltage (1.3V) but as soon as windows load, its the same result (200,4x,1.0V).

So could this be a CPU or mobo issue? I would hate to buy a new CPU and it turn out to be a mobo problem.
April 3, 2012 11:17:30 AM

Meltdown08 said:
ASUS M4A79T Deluxe mobo
AMD Phenom II X4 945 3.0ghz
4Gb (2x2gb) Corsair XM3 1333mhz
Sapphire ATI HD 4870 1gb


For the last 2 and a half years, this computer was running top notch. I had it running at 3.2Ghz and everything was good. In the recent month that my computer is running MUCH slower than usual and my games lagged like hell. So I did a fresh install of Win7 64 and that didn't help. Then I saw that the windows experience index set my processor score at 3.7 where it use to be over 7.0. I look more into it and found out that my CPU is actually running at 800mhz instead of the 3.0GHz it use to run at. It turns out that the multiplier is stuck at 4x (200 x4) instead of 15x. I went to bios and made sure the Quiet N Cool is disabled but it didnt help. Also, I ran Prime95 and that didnt get the speed up to where it should be. I tried ASUS overdrive and set the multiplier to 15X but it reset back to 4x after I hit apply. I also changed the setting in BIOS to 200 x15 but that also doesnt help. The processor is supported in that version of BIOS im using because... first of all, it worked for 2 and a half years. The BIOS sees and recongnizes the processor and clock however its all messed up in windows. I also tried updating the BIOS but that actually gave more trouble than what its worth. The new BIOS caused it not to POST unless i clear the CMOS everytime I restart the computer. I had to downgrade the BIOS back to about the same BIOS I had it for it to POST correctly. And for the record, the new BIOS didnt help the clock either. I see alot of people had this problem with this processor when it was introduced back in 09 but a BIOS update fixed it for them.

Is there anything I can do to fixed this? Was there a windows update that screwed with my CPU clock? Or is my CPU screwed? I already formated the HD twice now and I am about to do it a third time because I am thinking maybe its a windows update. I am goingto run CPU-Z after a fresh install to see the clock speed without updates. I was hoping to squeeze another 2 years out of this computer before I have to build a new one.


That happened to me after installing catalyst 12.2 last week. Go into windows control panel > hardware and sound > power options > change to performance setting. See if that's it.
April 3, 2012 11:35:17 AM


That happened to me after installing catalyst 12.2 last week. Go into windows control panel > hardware and sound > power options > change to performance setting. See if that's it.
Also open catalyst engine control center > performance > cpu power > slide the bar from min to max.

The 12.2 update had my cpu running at 800 and gpu card at 157.
April 3, 2012 12:24:09 PM

I had this also after upgrading catalyst so I uninstalled it and went back to the previous version to get it to work properly again. I might have a play around with those settings tonight and see if I can get it to work.
a b à CPUs
April 3, 2012 12:43:12 PM

If this doesn't fix it you guys. then you may need to look at getting either newer chipset's or a new CPU
a b à CPUs
April 3, 2012 12:44:52 PM

Quote:
Get an i5 2500k

Completely Irrelevant
April 3, 2012 3:27:15 PM

teryakisuace said:
That happened to me after installing catalyst 12.2 last week. Go into windows control panel > hardware and sound > power options > change to performance setting. See if that's it.


teryakisuace said:
That happened to me after installing catalyst 12.2 last week. Go into windows control panel > hardware and sound > power options > change to performance setting. See if that's it.
Also open catalyst engine control center > performance > cpu power > slide the bar from min to max.

The 12.2 update had my cpu running at 800 and gpu card at 157.


I already uped the performance on Win7's side. I however did not on Catalyst side. I'll will try it as soon as I get home from work. Thank you everyone for your suggestions
April 3, 2012 3:44:21 PM

Shtopor said:
Hi, Meltdown08
Faced with the same ***

http://vip.asus.com/forum/view.aspx?board_id=1&model=M3...

We have to try another CPU, I think.


I just read your post and it is rather confusing if its the CPU or the mobo. The thing was that the CPU works fine on another mobo. Ill try to put the computer to sleep and wake it up to see if that helps... but if that is the case, it will seem like a software in compatibility issue. On a side note, my PC never likes waking up from sleep mode. Alot of times, it just freezes on a blank screen so I've turned off the sleep mode. Its been like that on day one. I also have winXP 64bit on a different HDD that I've been meaning to boot to see if I get the same problem.

As for buying a new CPU, I figure I can go to a 6-core that is supported my the mobo but then again, why should I stick with the same mobo... its outdated and still sports the PCI-E 2.0, SATA 2.0, and USB 2.0. If I HAD to get a new CPU, I might as well get new CPU/mobo/RAM first and save money to get new HDD (SATA3.0) and vid card later. I ws hoping to avoid all of this by waiting another 2-years to upgrade so I can skip this generation entirely.
April 3, 2012 5:18:34 PM

Just to know, when you use the PC in full load (or some heavy program) the speed is still 800Mhz? Because my phenom is in 800 when idle and 4.0 in 100% full load work.

Thats Cool and Quiet thing. Just asking.
April 3, 2012 7:45:08 PM

einterlan said:
Just to know, when you use the PC in full load (or some heavy program) the speed is still 800Mhz? Because my phenom is in 800 when idle and 4.0 in 100% full load work.

Thats Cool and Quiet thing. Just asking.


Cool N' Quiet is disabled in the BIOS. Plus, running prime95 is not doing anything so its not the load nor CnQ
April 3, 2012 10:03:56 PM

teryakisuace said:
That happened to me after installing catalyst 12.2 last week. Go into windows control panel > hardware and sound > power options > change to performance setting. See if that's it.
Also open catalyst engine control center > performance > cpu power > slide the bar from min to max.

The 12.2 update had my cpu running at 800 and gpu card at 157.


Under Catyst engine CC > Performance > I do not see CPU power. I only see AMD OverDrive which only have settings for the GPU not the CPU
a c 88 à CPUs
a b À AMD
April 3, 2012 10:21:34 PM

if the cpu is proven to work on another board then your left with your board having a problem...
most likely it will be a north bridge or south bridge problem... also you have checked the speeds but i see nothing about temps...
if the cpu is overheating then it will throttle if the motherboard supports the feature (some dont and the cpu will just pop)...
my guess is that the motherboards own chips have over heated forcing the cpu to run at the lowest possible multi...
if you have a thermometer of some kind try to get the temps of the chips on the motherboard... the northbridge is often the chip thats down and to the right of the cpu with a heatsync on it. the south bridge is often just below the cpu and may or may not have a sync on it...

also dont forget to get the temps of the cpu... as it stands it should be pretty much at room temp while running at 800mhz so if its reading 50 or 60 then you know theres a problem...
April 3, 2012 10:40:57 PM

HEXiT said:
if the cpu is proven to work on another board then your left with your board having a problem...
most likely it will be a north bridge or south bridge problem... also you have checked the speeds but i see nothing about temps...
if the cpu is overheating then it will throttle if the motherboard supports the feature (some dont and the cpu will just pop)...
my guess is that the motherboards own chips have over heated forcing the cpu to run at the lowest possible multi...
if you have a thermometer of some kind try to get the temps of the chips on the motherboard... the northbridge is often the chip thats down and to the right of the cpu with a heatsync on it. the south bridge is often just below the cpu and may or may not have a sync on it...

also dont forget to get the temps of the cpu... as it stands it should be pretty much at room temp while running at 800mhz so if its reading 50 or 60 then you know theres a problem...


Im using ASUS Probe II for these temp readings... when idle, the CPU is running about 36-38oC and the MB is at 35oC so its alittle over room temp. As for an actual thermometer, I dont have one.
a b à CPUs
April 3, 2012 10:49:01 PM

Quote:
Get an i5 2500k


Piss off troll, one more off topic comment and you are reported.
a b à CPUs
April 3, 2012 10:53:10 PM

Meltdown08 said:
I just read your post and it is rather confusing if its the CPU or the mobo. The thing was that the CPU works fine on another mobo. Ill try to put the computer to sleep and wake it up to see if that helps... but if that is the case, it will seem like a software in compatibility issue. On a side note, my PC never likes waking up from sleep mode. Alot of times, it just freezes on a blank screen so I've turned off the sleep mode. Its been like that on day one. I also have winXP 64bit on a different HDD that I've been meaning to boot to see if I get the same problem.

As for buying a new CPU, I figure I can go to a 6-core that is supported my the mobo but then again, why should I stick with the same mobo... its outdated and still sports the PCI-E 2.0, SATA 2.0, and USB 2.0. If I HAD to get a new CPU, I might as well get new CPU/mobo/RAM first and save money to get new HDD (SATA3.0) and vid card later. I ws hoping to avoid all of this by waiting another 2-years to upgrade so I can skip this generation entirely.


Due to the CPU working in another rig I would begin my suspecting the mobo.

If you are considering a new mobo the asrock 970 extreme 3 i use is awesome $90.00 gets you an AM3+, USB 3.0, sata3, dual PCI-e slots, 2100Mhz ram support, 125W support, UEFI BIOS and a 970 chipset. You can't lose man.
April 3, 2012 11:27:17 PM

Im sorry for the misunderstanding... when I said that the CPU works fine on another mobo... I was refering to Shtopor's link... I havent tested this CPU on another mobo so I have no idea. But I am suspecting that its the CPU that is screwed...

Reason for it is that when I update my BIOS, the PC freezes on POST. I must clear CMOS everytime just to POST and load windows. Anything aboove verson 1306 does that. My CPU is supported in 0906. I am using the 125W 945 version. My guess is the higher BIOS is causing the CPU to choke so it wont POST because its attempting to run default processor settings. Why does clearing CMOS allow it to boot? I have no idea. But even after clearing CMOS and booting, the damn multiplier is still stuck at 4x with the higher BIOS.

On a different note. I tried the changing the Catylst CC settings and even uninstalling it with no effect. I also booted up WinXP 64bit of a backup HDD and ran CPU-Z. I am also getting 800mhz on XP so its not software
a b à CPUs
April 3, 2012 11:41:56 PM

You said you were going to use CPU-Z to monitor your clock speed, have you done this while running under load?

Make sure you have thermal control and clock functions disabled (C1E etc) other than Cool'n'Quiet.

How many different BIOS versions have you tried?

My guess is it's the mobo.

Give this a read.

http://www.overclock.net/t/738906/cpu-stuck-at-800mhz-w...

http://vip.asus.com/forum/view.aspx?id=2008041109560523...

Quote:
It's an AMD.


Quote:
Get an i5 2500k


^^ You aren't helping anybody with posts like that. AMD CPUs are just as good as Intel when it comes to build quality.
a b à CPUs
April 3, 2012 11:52:21 PM

Meltdown08 said:
Im sorry for the misunderstanding... when I said that the CPU works fine on another mobo... I was refering to Shtopor's link... I havent tested this CPU on another mobo so I have no idea. But I am suspecting that its the CPU that is screwed...

Reason for it is that when I update my BIOS, the PC freezes on POST. I must clear CMOS everytime just to POST and load windows. Anything aboove verson 1306 does that. My CPU is supported in 0906. I am using the 125W 945 version. My guess is the higher BIOS is causing the CPU to choke so it wont POST because its attempting to run default processor settings. Why does clearing CMOS allow it to boot? I have no idea. But even after clearing CMOS and booting, the damn multiplier is still stuck at 4x with the higher BIOS.

On a different note. I tried the changing the Catylst CC settings and even uninstalling it with no effect. I also booted up WinXP 64bit of a backup HDD and ran CPU-Z. I am also getting 800mhz on XP so its not software


I disagree man. Your mobo is more responsible for adjusting and regulating the clocks than the CPU. The fact whenever you update the BIOS you have more issues really points me to a failed mobo (most likely NB or SB) CPU rarely ever ever god bad like that.
April 4, 2012 2:20:58 AM

Raidur said:
You said you were going to use CPU-Z to monitor your clock speed, have you done this while running under load?

Make sure you have thermal control and clock functions disabled (C1E etc) other than Cool'n'Quiet.

How many different BIOS versions have you tried?

My guess is it's the mobo.

Give this a read.

http://www.overclock.net/t/738906/cpu-stuck-at-800mhz-w...

http://vip.asus.com/forum/view.aspx?id=2008041109560523...





^^ You aren't helping anybody with posts like that. AMD CPUs are just as good as Intel when it comes to build quality.


Here are my BIOS CPU settings:
GART Error Reporting [Disabled]
Microcode Updation [Enabled]
Secure Virtual Machine Mode [Enabled]
Cool N Quiet [Disabled]
ACPI SRAT Table [Enabled]
C1E Support [Disabled]
Advance Clock Calibration [Disabled]

Yes i tried CPU-z under load (prime95) but that doesnt do anything.

Here are the BIOS version I tried and the results... If I said it will not boot, I had to clear CMOS everytime I restart the PC to boot it:
3503 > Will not boot...Windows is buggy
3303 > Will not boot... Windows is less buggy
3107 > Will not boot... Windows is buggy
3004 > Will not boot... Windows is less buggy
2402 > Will not boot... dont know if buggy or not
1306 > Will boot... Windows works perfectly
1202 > Will boot... Windows is buggy

I am currently using 1306... When I say buggy, I mean that some task bar icons (such as wifi signals etc) will not show even though the program is running. There is an empty space there where the icon should be but nothing hapens when you click on it. Another buggy thing I noticed is every webpage I go to says its missing a security certificate even if its not a secured site. Almost all webpage works incorrectly. Less buggy means the icons show but the webpages security certificate issue is there.
April 4, 2012 2:36:37 AM

cmi86 said:
I disagree man. Your mobo is more responsible for adjusting and regulating the clocks than the CPU. The fact whenever you update the BIOS you have more issues really points me to a failed mobo (most likely NB or SB) CPU rarely ever ever god bad like that.


If this is the case then I may pick up a new mobo/CPU/RAM in a month after I save up some money. I see that you recommend the ASRock mobo up there. Quick question... is there a AMD mobo out there that support PCI-E 3.0? I would like to upgrade to the newest ATI 6xxx or 7xxx series. if i build another one, I want it to last a few more years.
a b à CPUs
April 4, 2012 10:19:13 AM

Their newer BIOS versions don't post without a CMOS clear?

I'd contact Asus, with anger.
April 4, 2012 7:49:28 PM

Raidur said:
Their newer BIOS versions don't post without a CMOS clear?

I'd contact Asus, with anger.


I tried and they told me to contact the RMA department. I honestly dont know even if its even under warrentee anymore
April 8, 2012 10:32:04 AM

Meltdown08 said:
I tried and they told me to contact the RMA department. I honestly dont know even if its even under warrentee anymore


By the way, I've tried to put Phenom II x6 1045T on this MB - the same problem, multiplier drops to 4x...
a b à CPUs
April 8, 2012 1:59:50 PM

Do you have AMD extra's on like power saver or Turbo core or anything like that. COuld be a Power saving features locking down the Multiplier
April 8, 2012 5:12:30 PM

Rockdpm said:
Do you have AMD extra's on like power saver or Turbo core or anything like that. COuld be a Power saving features locking down the Multiplier

All such options are turned off. Moreover it happened suddenly, no changes were made by me.
a b à CPUs
April 8, 2012 5:56:10 PM

I am gonna say its the Motherboard.... May not be a major issue hendering you from further use of the board but its enough of a Minor issue where i'd say... get a new chipset
a b à CPUs
April 10, 2012 8:20:53 PM

Meltdown08 said:
If this is the case then I may pick up a new mobo/CPU/RAM in a month after I save up some money. I see that you recommend the ASRock mobo up there. Quick question... is there a AMD mobo out there that support PCI-E 3.0? I would like to upgrade to the newest ATI 6xxx or 7xxx series. if i build another one, I want it to last a few more years.


There are PCI-E 3.0 boards out there but they are mostly premium boards $300 + so I wouldn't really suggest any of them as they are not cost effective and in my research offer ZERO performance difference. Any modern GPU will run just fine on a 2.0 bus. I don't see a market wide shift to PCI=e 3.0 coming for quite a long time. I gotta say it's time for you to snag a new board man.
May 3, 2012 1:40:25 AM

Alright... You guys are right. It is the mobo that is messed up and not the CPU. I popped another AMD CPU (AMD Phenom II x2 255 60w 45mm Regor AM3. 3.1GHz 15.5x 200mhz)in it and it also runs at 800mhz. Then I popped the original CPU (AMD Phenom II X4 945 Deneb 3.0GHz Socket AM3 125W Quad-Core Processor HDX945FBGIBOX) into another mobo and it runs at the correct 3.0ghz speed.

I just requested an RMA from ASUS and hopefully will get it fixed soon.

Thank you all for your help
a b à CPUs
May 3, 2012 1:51:53 AM

No Problem. If you ever have any further issues or questions, please contact us by filling out the proper form for a new thread. Have a good one!
October 7, 2012 3:08:41 PM

Has anyone tried testing under linux? Because I have the same problem with my AMD Phenom II x6. I've tried the cpu in another mobo, as well as another cpu in my currnet mobo, and they both run normally, but those are with fresh installs of win7 x64. After running windows update, They both dropped to 800mhz. I had heard that a windows hotfix was to blame for this sort of problem on the new AMD FX x8. I do not have catalyst installed, nor any special drivers for the mobo or the cpu. I do have nvidia installed for my video card, and I use Realtek for my on board sound. This is a really aggravating problem because I have very little experience with working in the bios. I've never updated the bios, or overclocked the cpu, I only know I have the problem because my games wont run anymore and my cpu meters are telling me that it's running at 800mhz. CPUID and windows can't identify my cpu anymore, where once they could, and they only tell me that it runs at 800mhz. I would appreciate some advice.
a b à CPUs
October 7, 2012 8:06:55 PM

See like I was saying before... If AMD Turbo boost or power saving junk is turned on... your CPU will Idle at a lower frequency most of the time unless its under full load.
March 24, 2013 5:28:07 AM

Meltdown08 said:
Alright... You guys are right. It is the mobo that is messed up and not the CPU. I popped another AMD CPU (AMD Phenom II x2 255 60w 45mm Regor AM3. 3.1GHz 15.5x 200mhz)in it and it also runs at 800mhz. Then I popped the original CPU (AMD Phenom II X4 945 Deneb 3.0GHz Socket AM3 125W Quad-Core Processor HDX945FBGIBOX) into another mobo and it runs at the correct 3.0ghz speed.

I just requested an RMA from ASUS and hopefully will get it fixed soon.

Thank you all for your help


March 24, 2013 5:28:42 AM

so i have same problem and did you test that you take all connections off from your computer i test it and it works sometimes but later it get back to that same problem and i thing i need to buy new mobo to get my computer work so if you now some not so expensive but good working mobo can you send me link

!