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I5 2500k Trying for 5Ghz

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a b K Overclocking
October 28, 2011 8:54:36 AM

Hi!

Real quick question! :ange: 

Case: NZXT Phantom
PSU: NZXT Hale90 1000W
RAM: A-Data DDR3 2000X @ 2133mhz 9-9-9-24 1.70V
CPU: i5 2500k @ 4.8Ghz 1.43V (Offset +0.040v) (VTT Voltage= 1.90V) (C1E off, C3 off, C6 off, Spread Spectrum off) [CPU PLL Overvoltage ON]
CPU Cooler: Corsair H100
GPU: (2) MSI R6950 Twin Frozr II [Shader Unlocked] [1Ghz|1450Mhz]
Sound: Creative X-Fi Fatal1ty
Motherboard: Asrock Z68 Fatal1ty Professional Gen3
SSD: Corsair 60GB Force Series 3 SATA III

Question: What can you raise (Example: PCH, VTT, CPU PLL, etc.] in terms of voltages to help you from ramping up the vcore?

Update: My i5 2500k only hit 4.5Ghz, Just switched to another i5 2500k (my friends, he doesn't oc).

Let's hope this one hits 5GHZ!

Update 2: 4.8Ghz @ 1.43v, 8hr Prime Blend Stable

Trying for 5Ghz Stable now..

More about : 2500k 5ghz

October 28, 2011 9:07:12 AM

that's sick. can a i7 950 get to 4.5 GHz? What cooling do you use for an attempt at 5 Ghz?
a b K Overclocking
October 28, 2011 9:27:37 AM

i've had a i7 950 before, max oc i could get on those things were like 4.2-4.4ghz, some people gone 4.5ghz, maybe 2-5% of people.

Hitting 5ghz to 5Ghz+ on a i5 2500k is the same as the i7 950 hitting 4.5Ghz [+]

I have a Corsair H100 w/ two 120mm push, and two 200mm Pull (Top Fans of NZXT Phantom CASE)

4.5Ghz is getting me 45-50C on load. I won't need to stop until 72-75C.
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a b à CPUs
October 28, 2011 10:26:29 AM

Probably the chip wont go any higher (at least with that mobo, but probably with others would jsut go a notch higher if anything at all).
After all most chips (about 50% if i remmber right) get to 4.5 max, then it was like 5% hitting 5ghz (again, if i remmber right).
a b à CPUs
a b K Overclocking
October 28, 2011 10:43:28 AM

Why would you need 5.0 GHz? CPU intensive tasks? Why didn't you get a i7 then?
a b K Overclocking
October 28, 2011 10:56:10 AM

@ Samuelspark

5Ghz for sheer self satisfaction i suppose.

All i do is play Battlefield 3 and use Microsoft Word lol.

Just high enough not to bottleneck dual 6970's @ 1Ghz core /1500memory.

So far everything is stable 4.6Ghz on prime blend for about 1 hour, 1.330 volts.

@ cat's_paw

That's about correct ;D

@ Thread

Anyone know other memory coolers that look like this?

http://www.xoxide.com/evercool-memory-cooler-red.html

I have a H100 that blocks the top 5mm-7mm of my ram so i can't buy fully equip memory fan.

I need one that sticks over or clicks in. Red LED would also be great!
October 28, 2011 10:58:47 AM

you;ve hit its wall .
a c 172 à CPUs
a c 197 K Overclocking
October 28, 2011 12:01:34 PM

Only about 10% of the i5-K's will reliably run at 5.0 GHz.
a b à CPUs
a b K Overclocking
October 28, 2011 12:37:08 PM

i5 2500k won't bottleneck dual 580's don't worry about it.
a c 117 à CPUs
a c 182 K Overclocking
October 29, 2011 3:23:39 AM

There is no gaming performance advantage over 4.5ghz anyways.
a b K Overclocking
October 29, 2011 5:31:42 AM

Doesn't make sense.

I had it stable 4.6Ghz @ 1.330v for 5 hours, put it to sleep, woke from sleep, and everything froze. Windows wouldn't even respond on 4.6Ghz after it logs in.

Enabled C1,C2,C6, and whatever C's there were left and now im somehow...

AT 5GHZ!

WOAHH!

I know my voltages are high, i'll slowly decrease it after Prime/LinX tests.

Can anyone explain how it randomly started booting now with 47,48,49, and 50 multiplier?

Note: After i got mad at Windows 7 Freezing, i reinstalled Windows 7 64bit to clear out two old motherboard drivers, old sound cards, graphic drivers, etc.

http://img683.imageshack.us/img683/1042/unledkbp.jpg
October 29, 2011 5:35:48 PM

got my i7 2600k at 4.3 on 1.26v no need to go to 4.4 for any games plus the bump in v for anything more gets too great
a b à CPUs
a b K Overclocking
October 29, 2011 6:23:36 PM

Couple of comments'
Keep Vcore below 1.5 V, Max spec from intel is 1.5 V so I'd recommend no higher than 1.4 V.
Max spec voltage for Ram is 1.575 V (I'm running 1.60, but That is ONLY becuase I already had 16 gigs of DDR3-1600 CL7 from My I5-750 system. Some reused their 1.65 V ram. But Intel has indicated that it looks like some of the "Failed" cpu have been due to running 1.65 V Ram (How true, good question)

Diff between 4.6 and 5.0 is only 8.7 Percent not enought to notice outside benchmarks.

On the Base freq. (100 MHz). it is not recommended to change this. That is also applied to the pci buss and increasing it above 103 can cause all kinds of wierd a double s Sh*t . Also 3 x 50 is only 150 MHz - Real biggy

Myself, I hit 4.8 OK (Vcore was under 1.4 - but do not remember exact voltage), but backed off to 4.6 as There is NOT difference between 4.6 and 4.8 outside of a benchmark. My cores only reach 58->60 C max under load.

Added. When ever you change your OC always run memtest 86 from a boot CD BEFORE going back into Operating system and after operating system is loaded I always double check by runing prime 95 in blend mode to verify temps/stablity/voltages.
a b K Overclocking
October 30, 2011 3:25:27 AM

Thanks a lot Retired Chief.

I didn't want to go over 1.4v as well, but i was able to land a 1.43v stable running 4800Mhz Frequency.




Anything less voltage would crash me. Hit also 5Ghz 2 Hour Prime 95 Blend Stable w/ 1.48V, didn't bother keeping it at that (74C Max)

Running using offset mode , i can save energy and so the processor won't have so much continuous overclocked voltages running through it.

(Offset mode for these P67,Z68 boards is a real B*&CH to use. The LLC too)

What kind of cooler did you have to run 4.8Ghz under 60C?

I myself am getting 70C Max running a Corsair H100 with 2 push and 2 pull on High Speed. (You must have a real water cooler)

-Tim
October 30, 2011 4:41:08 AM

Well from my experience, that is if you stick with air cooling only, there's not only the CPU cooler to consider but also the case air flow, how much air passes through, dead space (w.e it's actually called, where the air does not circulate) and how much air recirculates. Even little things like heat induction from the mobo or from any hardware close to it can also slightly affect it.
*I did not notice if you did post what case and case fans you're using. A picture could also be helpful for flow management (to see where the air comes in and out, how crowded it is and so on).
a b K Overclocking
October 30, 2011 6:07:07 AM

@ King_Maliken

Oh of course, i don't think insufficient air flow would be an issue for me.

I would of considered the CPU If i still had my old Thermalright Silver Arrow, but switched to Corsair H100, and everything has been fairly easier.

Here are three pictures i took.

Without Side Case:



With Side Cade:



Front View:



Like i said, i had a Silver Arrow before so i could not fit a side fan, thus i modded into a Window. :pt1cable: 

Phantom didn't come with front 140mm fan, no upper 200mm fan, and a pre-installed silent 200m upper fan.
-I added a NZXT 140mm (Performance), and placed (2) NZXT 200mm (Performance) for the upper areas.

Question
: Would i be in the clear if i overclocked my CPU to 5Ghz, lets say at 1.48-1.5v? I don't leave my PC on 24/7, and the overclock would only hit the set voltages if i played Games or run cpu intensive programs, it will die down at idle (due to Offset mode and Intel Speed Step)

I don't want to degrade Silicone inside the cpu with all these voltages. :( 

a b à CPUs
a b K Overclocking
October 30, 2011 1:23:30 PM

My 60 C was @ 4.6 GHZ, Only left it at 4.8 to see if ir was stable I think the temps were upper 60's. I'm Using the Zalman 9900Max HSF (Got it on sale).
a c 80 à CPUs
a c 205 K Overclocking
October 30, 2011 2:48:44 PM

trihedral said:
Hi!

Real quick question! :ange: 

Case: NZXT Phantom
PSU: NZXT Hale90 1000W
RAM: A-Data DDR3 2000X @ 2133mhz 9-9-9-24 1.70V
CPU: i5 2500k @ 4.8Ghz 1.43V (Offset +0.040v) (VTT Voltage= 1.90V) (C1E off, C3 off, C6 off, Spread Spectrum off) [CPU PLL Overvoltage ON]
CPU Cooler: Corsair H100
GPU: (2) MSI R6950 Twin Frozr II [Shader Unlocked] [1Ghz|1450Mhz]
Sound: Creative X-Fi Fatal1ty
Motherboard: Asrock Z68 Fatal1ty Professional Gen3
SSD: Corsair 60GB Force Series 3 SATA III

Question: What can you raise (Example: PCH, VTT, CPU PLL, etc.] in terms of voltages to help you from ramping up the vcore?

Update: My i5 2500k only hit 4.5Ghz, Just switched to another i5 2500k (my friends, he doesn't oc).

Let's hope this one hits 5GHZ!

Update 2: 4.8Ghz @ 1.43v, 8hr Prime Blend Stable

Trying for 5Ghz Stable now..


One definite problem that is holding you back is red above in your quote, running your memory at 1.70v on a Sandy is a bad idea,1.65v is the maximum you should run your memory voltage, you'd be better off heat wise to have gotten dedicated 1.50v
modules, you threw extra heat in the mixture from the very beginning.

You do realize the memory controller is on the CPU right?

You really should have researched more before buying and got memory matched and tested with the platform, memory with a voltage range of 1.550v ~ 1.750v wasn't even designed to be run in the 1155 anyway.

http://www.newegg.com/Product/Product.aspx?Item=N82E16820231468

Additionally if you change to 1.50v modules you'll be back to square one with your overclocking as the CPU will actually be running cooler, so all those other voltages you were inquiring about tweaking won't be necessary.

a b à CPUs
a b K Overclocking
October 30, 2011 2:52:15 PM

^ 4ryan6 Good catch, infact the Intel spec for SB is a max Ram Voltage of 1.575 V.
Back of my mind Intel has reported that some of the failed SB CPUs are a result of using 1.65 V DRAM Voltage. I'm using 1.60 and that is only because I moved my 16 gigs (4 x 4) DDR3-1600, cl7, @1.60 V over to the I5-2500k. Put my old 4 x 2 gig DDR3-1600, CL7, @ 1.60 V back in the I5-750.
a c 80 à CPUs
a c 205 K Overclocking
October 30, 2011 4:28:11 PM

RetiredChief said:
I moved my 16 gigs (4 x 4) DDR3-1600, cl7, @1.60 V over to the I5-2500k.


Chief, already having 16gb in possession is definitely something you'd want to hang on to, have you tried lowering the memory speed along with the voltage down to 1.50v? You should still have great performance with that much memory?


a b K Overclocking
October 30, 2011 6:03:59 PM

@ 4ryan6

wow thanks for point out the problem, it might have something to do with that.

The A-Data 2000x supports:

1600Mhz = 1.4V
1866Mhz = 1.5-1.6V
2000Mhz = 1.65V


What i did:
2133Mhz = 1.65v-1.8V (Stopped working for me)

Recently the ram stopped working @ 2133Mhz no matter what voltages i've tried.

Didn't think that the ram would stop performing over a 133mhz increase even if i ramped up the ram's voltages.

It is too late to switch ram, i've had this since my i7 950 setup and no $ to get new ones & and i do not like RipJaws (Terrible Timing)

Since the ram i use now recommends from 1.6v-1.8v, i will try to see if they can stabilize at 1.575v, either that or 1.6v.

That should surely help my core stay cooler and stabilize my system right?


Update: Thing became failsauce, i got it to 1.635V and had 5 passes on memtest, started the system and had a blue screen. Had to revert to 4.6Ghz to become stable.
a b à CPUs
a b K Overclocking
October 30, 2011 8:31:43 PM

It not a ram problem, as Ryan pointed out it is a problem with the "On die" memory controller inside the CPU. I believe it's to do with the voltage differenial between memory and the memory controller. The controller recieves it voltage from a different sourse and the data coming from the memory module would exceed the controller supply voltage, generally no a good thing.

4Ryan. No I thought about it as there is not noticable differenc is say knocking it down to CL8 and running it at the rated CL7. My thinking was 1.60 is only 0.025 above the max spec so figured I'd just leave it as it was stable as opposed to playing around with the timings at say 1.5-> 1.550 V

a b K Overclocking
October 30, 2011 9:19:24 PM

I couldn't get the ram stable under 1.65V. I guess i will just have to use this setup, and make the best of it until LGA 2011.

I don't run my PC 24/7, heck, i play only 30 minutes of BF3 a day and that's pretty much it.

If the overclock i have is using Offset mode which lowers voltages along with Speed Step, lowing Frequency, Would you think i would be in the clear running 5Ghz @ 1.52V?

Totally obsessed with 5Ghz (Pretty Number), and won't want to go lower.

Current:




Temperature is kind of high, but i doubt it will get this hot playing standard games.

-Tim
a b K Overclocking
October 31, 2011 1:13:39 AM

5GHZ Stable Achieved

Cinebench 11.5 Score: 7.88



a c 80 à CPUs
a c 205 K Overclocking
October 31, 2011 2:19:27 PM

trihedral said:
I couldn't get the ram stable under 1.65V. I guess i will just have to use this setup, and make the best of it until LGA 2011.

I don't run my PC 24/7, heck, i play only 30 minutes of BF3 a day and that's pretty much it.

If the overclock i have is using Offset mode which lowers voltages along with Speed Step, lowing Frequency, Would you think i would be in the clear running 5Ghz @ 1.52V?

Totally obsessed with 5Ghz (Pretty Number), and won't want to go lower.

Current:


http://img202.imageshack.us/img202/8647/99828719.jpg

Temperature is kind of high, but i doubt it will get this hot playing standard games.

-Tim


Tim 80 C is 176 F what was that a 15min prime95 run You hit 80c in 15min?

Are you trying to destroy your CPU just for 5.0ghz?

Running that kind of temperature constantly, it may not last you until LGA 2011 is released.

Check these temps, voltage, and clock.

http://i130.photobucket.com/albums/p250/4ryan6/WinXP51GScreenshot.jpg

My point is I have the cooling to allow the higher clocks, in a safety zone, you do not, you really need to reconsider this obsessed with 5.0ghz bug you have, before you seriously damage your hardware.
a c 80 à CPUs
a c 205 K Overclocking
October 31, 2011 2:25:04 PM

This topic has been closed by 4ryan6
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