Sign in with
Sign up | Sign in
Your question

Overclocking AMD Phenom II x6 1055t to 3.5GHZ

Last response: in Overclocking
Share
November 23, 2012 10:56:10 PM

I'd like to achieve a 3.5GHZ overclock on my AMD Phenom II x6 1055t processor. I'm not very knowledgeable about overclocking, as I have never permanently used one, but I do know that C1E and Turbo Boost should be disabled. However, I will most likely leave Cool and Quiet on, unless strictly told other wise. I also do know that because of increased FSB (250 for 3.5GHZ I believe) it will proportionately impact the system (increased memory frequency, etc.)
I'd like to know how to achieve such an overclock. It is clear that because I do not have a black edition processor, I will disable Turbo Boost and use a 14x multiplier and an FSB of 250 (for 3.5GHZ). If memory speed increases above my memory speeds of 1600 MHZ, I will use a lower frequency.
For a 3.5GHZ overclock, must the voltage be altered? Either way, I'd like someone to explain to me exactly how to change an offset vcore voltage, as I am confused about this. I may just use a specified manual voltage.

Thank you everyone.
a c 78 à CPUs
a b K Overclocking
a b À AMD
November 24, 2012 10:38:02 AM

Here's a cut n paste from one of my replies to this question in another thread:

....................................................................

I have my 1045t OC'd to 3.4 Ghz with all 6 cores running. It could go higher but, I'm limited by heat because I can't fit a bigger cooler in my case.

I recommend getting some free software first. CPU-Z and HWmonitor, and prime95.

CPU-Z will show you frequencies, voltages and ram timings.

HWmonitor will show you temps. *Be warned* HWmonitor was showing my core temps 10 degrees lower than they actually were. The temp labeled "TMPIN2" was actually tracking perfectly with the core temps shown in AMD Overdive. So look for the highest temperature other than your video card. (many video cards can safely run at hotter temps than your CPU.) The hottest one on my Gigabyte 990 fxa ud3 (other than the video card) is the core temp. Try to keep it below 55C under full load.

Prime95 is the program that will stress test your computer to see if it can remain stable and cool under load. 2hrs of the blend test with no errors and no overheating is a general rule of thumb for a stable OC.

Now for the fun stuff.

Go into your BIOS and lower the multiples for your CPU and your Ram by a few steps. (The 1045t won't let you increase the multiplier above stock)
Then disable turbo (aka "core performance boost" )
Then find your CPU Host clock control and set it to "manual"
Then You should be able to change the "CPU Frequency" (I'll call it FSB) (This is before the multiplier, so it will be low. Mine started at 200)
Now increase that variable by a bit.

I recommend balancing your FSB and your "memory clock" (RAM) multiplier to a point where your ram is back down to stock speeds after you bump the FSB. So raise your FSB to something like 250 then adjust your RAM multiplier down so that your RAM us running at or near stock speeds.

Now move on to your CPU clock ratio. With the faster FSB, you will be able to run your CPU at higher frequencies with a lower-than-stock multiplier. I eventually took mine all the way back up to 13.5 with a final frequency of 3.4 Ghz.

I would recommend starting with a lower multiple that gets you just a couple hundred Mhz boost over stock at first. Then test for stability and heat. Run prime 95 for at least 30 minutes if you want to see your hottest temps. The blend doesn't get things hot until about the third bank of tests.

If things look good, go back into the BIOS and bump the multiplier some more and re-test.

My MB got rather ambitious with the voltages when I left it in auto, so use CPU-Z to keep an eye on core voltages. Many recommend just staying under 1.45 volts. I recommend not going any higher than you need to for a given clock speed. This will help keep heat down. I ended up using a negative offset "CPU voltage control" of -0.075 volts. This brought my core voltages down to about 1.344v at full load.

*note* I'm scraping the floor on voltage with my particular chip/speed. One notch lower and I get BSOD. You may be able to go a little lower or you may need a little more voltage for your chip and clock speed.

Now just test and adjust and repeat.

Generally speaking:

BSOD means you need more voltage, and/or less speed.

Overheating means you need less voltage and/or less speed. (or a better cooler for your CPU.)

If you get to the point where your temps are good and your computer is sable, and you still want to go faster (than ~3.4Ghz), you can go back and bump up the FSB. But remember to adjust your RAM multiplier back down to stock-ish speeds.

You can OC your RAM later, but that gets a little more complicated as you may have to adjust CAS timings and RAM voltages to make it work. Keeping your RAM at stock speeds should give you one less thing to worry about while you probe the limits of your CPU.

Good luck!

m
0
l
a c 108 à CPUs
a b K Overclocking
a b À AMD
November 24, 2012 11:25:34 AM


The sweet spot for your RAMs (1600MHz) is the system clock at 240MHz. Simply drop the memory divider from 8 to 6.67

240MHz x 6.67 = 1600MHz, or spec speed

Drop your HT multi to x8 (or 1600MHz, depending upon you BIOS setting). Keep your HT link speed as close to 2000MHz as practical. You may leave the IMC/NB multiplier at x10. At 2400MHz, you should see a nice bump in memory bandwidth and reduced latency.

Running C&Q is not an issue. Sometimes, Turbo can be your friend. When OC'ing it is advisable to disable it BUT if you can control the Turbo bump with something like phenom msr tweaker, you may limit the ceiling of the Turbo voltage boost.

Turbo simply works by adding a p-state with a voltage & multiplier bump. In the case of your 1055T, that would be 16.5x instead of 14x, so your *Turbo'd* cores would be running over 3.9GHz while multipliers and voltages on non-Turbo'd core is reduced.

The newer your motherboard, the greater likelihood of your success. Older designs (even early AM3 boards) did not have the *electricals* to properly manage the Thubans.

What might that motherboard be ?? :D 


edit:

And what might the purpose of your OC be ?? (gaming, video, etc ...)





m
0
l
Related resources
November 24, 2012 3:37:40 PM

Wisecracker said:
The sweet spot for your RAMs (1600MHz) is the system clock at 240MHz. Simply drop the memory divider from 8 to 6.67

240MHz x 6.67 = 1600MHz, or spec speed

Drop your HT multi to x8 (or 1600MHz, depending upon you BIOS setting). Keep your HT link speed as close to 2000MHz as practical. You may leave the IMC/NB multiplier at x10. At 2400MHz, you should see a nice bump in memory bandwidth and reduced latency.

Running C&Q is not an issue. Sometimes, Turbo can be your friend. When OC'ing it is advisable to disable it BUT if you can control the Turbo bump with something like phenom msr tweaker, you may limit the ceiling of the Turbo voltage boost.

Turbo simply works by adding a p-state with a voltage & multiplier bump. In the case of your 1055T, that would be 16.5x instead of 14x, so your *Turbo'd* cores would be running over 3.9GHz while multipliers and voltages on non-Turbo'd core is reduced.

The newer your motherboard, the greater likelihood of your success. Older designs (even early AM3 boards) did not have the *electricals* to properly manage the Thubans.

What might that motherboard be ?? :D 


edit:

And what might the purpose of your OC be ?? (gaming, video, etc ...)




My mother board is the Asus m4a87td/usb3. I know it obviously is not the best motherboard, even when I bought it a few years back.
Oh, and thanks for advising me on the other options I should change within the bios. I will try them soon.
I'd like to overclock for gaming purposes, just to see if I do get a noticeable increase in framerates. Also, I'm confused as to how I can set a negative offset voltage. In my mother board, the vcore setting is at 1.260, but the offset voltage is set to Auto. I've heard that Auto gives unnecessarily high voltages, so what should I set the offset voltage to, keeping in mind the vcore setting of 1.260, at stock speeds and at 3.4 or 3.5 ghz? And, exactly how does offset voltage work?

EDIT: Okay, I read a post on another forum and I understand offset voltage now. A negative offset is subtracted from the full load and idle voltages, and a positive offset will not be as exact, but will add voltage. Therefore, what offset voltage should I use, keeping in mind the voltage of 1.260 and a clock speed of 2.8, 3.4, and 3.5 (what voltages should I use for those settings), and should Load Line Calibration be altered to accommodate this? I'm quite young, so it might take a little time for me to comprehend information given to me. Thanks.
m
0
l
a c 138 à CPUs
a c 241 K Overclocking
a b À AMD
November 24, 2012 5:43:31 PM

OC phenom 1055T wil be good manual vcore/voltage than auto (offset) .. as long as the cool n quite still enabled it will auto drop when idle time .. 3.5ghz still medium oc :) 
m
0
l
a c 78 à CPUs
a b K Overclocking
a b À AMD
November 24, 2012 7:15:28 PM

ph0 said:

EDIT: Okay, I read a post on another forum and I understand offset voltage now. A negative offset is subtracted from the full load and idle voltages, and a positive offset will not be as exact, but will add voltage. Therefore, what offset voltage should I use, keeping in mind the voltage of 1.260 and a clock speed of 2.8, 3.4, and 3.5 (what voltages should I use for those settings), and should Load Line Calibration be altered to accommodate this? I'm quite young, so it might take a little time for me to comprehend information given to me. Thanks.


I'm running a negative offset of -0.075v and my 1045t is stable at 3.4 Ghz. (your mileage may vary)
m
0
l
a c 108 à CPUs
a b K Overclocking
a b À AMD
November 24, 2012 10:52:05 PM


You may save up to 8 different BIOS profiles with your motherboard.

For gaming (and helping your OC ceiling) ... you should experiment with disabling cores in your tweaking.

Fewer cores sharing the L3 will boost gaming - as will running the IMC/NB above stock 2000MHz.



m
0
l
November 25, 2012 2:38:12 PM

ph0 said:
I'd like to achieve a 3.5GHZ overclock on my AMD Phenom II x6 1055t processor. I'm not very knowledgeable about overclocking, as I have never permanently used one, but I do know that C1E and Turbo Boost should be disabled. However, I will most likely leave Cool and Quiet on, unless strictly told other wise. I also do know that because of increased FSB (250 for 3.5GHZ I believe) it will proportionately impact the system (increased memory frequency, etc.)
I'd like to know how to achieve such an overclock. It is clear that because I do not have a black edition processor, I will disable Turbo Boost and use a 14x multiplier and an FSB of 250 (for 3.5GHZ). If memory speed increases above my memory speeds of 1600 MHZ, I will use a lower frequency.
For a 3.5GHZ overclock, must the voltage be altered? Either way, I'd like someone to explain to me exactly how to change an offset vcore voltage, as I am confused about this. I may just use a specified manual voltage.

Thank you everyone.


Hi
Try this out "k10stat"Dropped cpu v down from 1.475v to 2v..It lowered temps by 12-15 c.Will give more room to oc
m
0
l
a c 108 à CPUs
a b K Overclocking
a b À AMD
November 25, 2012 5:38:38 PM


k10Stat and the PhII MSR-Tweaker are really great utilities for managing Thubans/Denebs.

You effectively may set your own P-States with voltages and clock-rates, and the learning curve is not severe.

They're kinda like the old n-Tune utility (if you are familiar with that)

m
0
l
November 26, 2012 5:38:41 PM

when you overclock, you usually have to UP the voltage to achieve stability. a lock up opr freeze means that the cpu is undervolted for the frequency, a bsod is usually a ram controller or ram problem, usually fixed by overfolting the ram systems and placing a fan over the ram. i, personally, think ram overclocking is beneficial, and ive never seen ram that wont rum one step over stock without needing the overvolting. i would actually reccommend overclocking tha ram while the cpu multiplier is still keeping toe cpu at clock speeds, so you know the max your ram and mobo can take, before moving on to the processor.
m
0
l
!