i7 860 OC

[Nevakonaza]

So i thought id give it a go,However load temps within a few seconds of prime 95 hit 70-73c on the 4 cores @ 3.4Ghz

Why does this Lynnfield chip run so damn hot? i remember my 65nm Q6600 GO at 3.5Ghz never went over 60c full load on a Tuniq tower

My system specs

Core i7 860
Prolimatech Megahalems Rev. B
Gigabyte GA-P55-US3L
4GB G-Skill Ripjaws 1600Mhz CL7(7-8-7-24)
Palit GTX 460 (858/1716/2189)
OCZ Vertex 2 60Gb SSD | 500+250Gb Hard Drives
Asus Xonar D1 Sound Card
OCZ ModXStream pro 600W Modular
Coolermaster CM690 (Window Modded)
7 Home Premium X64

 

[superccs]

Any reason to suspect your hsf thermal coupling? Sounds like a possibility if temps are quick to rise and fall off slow.

 

[perdomot]

What vcore are you using?

 

[Nevakonaza]

Any reason to suspect your hsf thermal coupling? Sounds like a possibility if temps are quick to rise and fall off slow.

Well i have both the fans on my Prolimatech hooked up to a fan controller,Theyre not connected to the motherboard.

It does the same thing with the temps if i have the fans turned right up 100%

What vcore are you using?

I left it at auto in the bios but in cpuz its showing as 1.360v

appreciate the help guys

 

[Nevakonaza]

BUMP

 

[coffeejunkee]

Don't use auto, it overvolts a lot. 1.360 is what you need for something like 3.8/4.0GHz. Set the vcore to the correct value or better use dynamic vcore.

Leave c-states enabled for low idle consumption/temps.

 

[Tencntraze]

I'm running about 1.36 @ 3.8 with 4x4GB Ram. After 20 passes of LinX I think my max temp was 79 or 80, and I'm running under air.

 

[RussianSensation]

1. Is your memory running at 1.65V? G.skill makes excellent Ram. I am able to run mine at about 1.58 at CL7-7-7-21 @ DDR3-1600. However, I chose to undervolt even more. Higher voltage ram produces more stress on the internal memory controller of the CPU. The lower the voltage, the better.

2. 1.36V is way too high for 3.4ghz on the 860. You can overclock to 3.4ghz on stock voltage. Try 1.296V. Probably can go far lower than that.

3. What is the fan on the Megahalems? Is it a high CFM fan?

Why does this Lynnfield chip run so damn hot? i remember my 65nm Q6600 GO at 3.5Ghz never went over 60c full load on a Tuniq tower

My Q6600 @ 3.4ghz also ran at about 62*C-64*C on the Tuniq Tower. Core i7 (1st generation) chips are a totally different ball game. Much much hotter than that Q6600 chip. HT alone adds about 8-10*C to the load temperatures.

 

[Nevakonaza]

Don't use auto, it overvolts a lot. 1.360 is what you need for something like 3.8/4.0GHz. Set the vcore to the correct value or better use dynamic vcore.

Leave c-states enabled for low idle consumption/temps.

ah okay,So what voltage would you recommend i manually start at for 3.6Ghz?

1. Is your memory running at 1.65V? G.skill makes excellent Ram. I am able to run mine at about 1.58 at CL7-7-7-21 @ DDR3-1600. However, I chose to undervolt even more. Higher voltage ram produces more stress on the internal memory controller of the CPU. The lower the voltage, the better.

2. 1.36V is way too high for 3.4ghz on the 860. You can overclock to 3.4ghz on stock voltage. Try 1.296V. Probably can go far lower than that.

3. What is the fan on the Megahalems? Is it a high CFM fan?



My Q6600 @ 3.4ghz also ran at about 62*C-64*C on the Tuniq Tower. Core i7 (1st generation) chips are a totally different ball game. Much much hotter than that Q6600 chip. HT alone adds about 8-10*C to the load temperatures.

Yeah im sure its runing at 1.65v on the memory,Il also try lowering that too and see what happens.

The fans on my Megahalem are just 2x standard coolermaster fans with LEDs..these are them.

http://www.coolermaster.com/product.php?product_id=2577

Would i be better getting something like this?
http://cgi.ebay.co.uk/AIREN-RedWing...ponents_Fans_Heatsinks_SR&hash=item255e811d31

what fans would you guys reccomend?

 

[coffeejunkee]

For 3.6GHz I need 'normal' vcore with an offset of +0.05625V and QPI/Vtt 1.10V. Turbo disabled. LLC disabled. Vcore in cpu-z shows 1.232V max.

If you want to get higher, you should first find out how much QPI/Vtt your bclk needs. Fex, set bclk to 180 and cpu multiplier to x15 with vcore at normal. Set memory to low multiplier/loose timings/1.5V so it's not overclocked. Do 20 runs Linx with all memory. If it fails, increase QPI/Vtt and try again. My cpu can do bclk 180 at 1.10 but it needs 1.21 for bclk 190.

Next increase the memory multiplier and voltage so your ram runs at its rated speed/timings. Do 20 runs Linx again, if it fails increase QPI/Vtt.

Then move on to the cores. Increase the multiplier to x20 fex. Run Linx again and now increase vcore in case of instability.

For high bclk like >180 you'll probably need to disable C3/C6 states. You might also need LLC enabled for higher freqs.

And don't forget to lock pci to 100MHz.

 

[RussianSensation]

For high bclk like >180 you'll probably need to disable C3/C6 states. You might also need LLC enabled for higher freqs.

And don't forget to lock pci to 100MHz.

Power saving states should work. Mine work regardless of Base Clock. I have LLC enabled. I would say for 3.6ghz, VCore of 1.25-1.28V should be enough. Do what coffeejunkie suggested and apply additional dynamic voltage adjustment to your stock Vcore. For this to happen, enable Dynamic VCORE function.

As an example:

CPU Vcore = Normal (nominal voltage of 1.19375V) <-- get this value once you boost without any overclocks at all (this is your stock voltage at 2.8ghz)
Dynamic VCore (DVID) = +0.10625
Effective CPU Vcore at Load = still 1.3000V (now able to lower voltages in idle mode to 0.9600V)

*** Dynamic VCore does not work if CPU VCore is set to Auto or to an actual voltage number. Therefore, to get Dynamic VCore (DVID) to work in idle mode when CPU is manually overclocked, the CPU Vcore MUST be set to Normal first *** Don't forget to set all Voltage Power Saving technologies (i.e., C3-C7 states, EIST, etc. ) to Enabled.

You may need to adjust QPI/Vtt voltage to 1.21 or so. It's safe, so don't worry. No need to play with PLL or anything like that.

Your fans are a bit on the weak side but 2 of them should be enough.

 

[coffeejunkee]

Power saving states should work. Mine work regardless of Base Clock.

I wish. At bclk 180 or higher Windows keeps crashing on boot with C3/C6 enabled. C1E and EIST work fine up to 4GHz (or higher, haven't tried).

 

[coffeejunkee]

Forgot to mention, also set qpi ratio to x32.