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Core i7 920 overclock temperatures

Last response: in Overclocking
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July 23, 2009 9:35:37 AM

My rig

Antec 1200 Full Tower Case
Intel Core i7 920 (D0 stepping)
ASUS P6T Deluxe V2 LGA 1366 X58
OCZ Gold 6GB DDR3 1600
Sapphire Radeon HD 4870 X2 2GB
Corsair 850W PSU
WD Caviar Black 1TB 7200 RPM
Sony Optiarc Black 24X DVD/CD Rewritable Drive
Scythe Mugen-2 120mm CPU Cooler

I used these settings to clock it at 3.8Ghz

Ai Overclock - Manual
CPU Ratio - 20
Intel Speedstep Tech - Disabled
BCLK - 190
PCIE - 100
DRAM Frequency - DDR3 1523MHz
CPU Voltage - 1.35
QPI/DRAM Voltage - 1.35
DRAM Bus Voltage - 1.64
C1E Support - Disabled

However, it runs 55C idle, and 85C in Prime95 using SpeedFan. That seems way too high to me. I'm not sure if I'm doing something wrong here (first time), or if I just have a crap cooler. I also tried setting it to 3.4GHz. It idles around 48C, and then jumps up to 84C as soon as I turn on Prime95. When I run it at 2.66GHz, it idles at 38C and the load is never more than 60C.
July 23, 2009 7:05:14 PM

It runs like that in every temperature program I try. Is it not installed properly, or is it possible that I just received a bad one from newegg?

Also, it ran cool at stock settings running tests on it for around 24 hours. Does that mean my cooler is just not good for overclocking?
July 23, 2009 7:25:32 PM

The Scythe Mugen 2 is a great CPU cooler, I don't know why your temps are so high tho. Have you tried reseating it like zip said? Or apply new thermal paste?
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July 23, 2009 8:11:51 PM

Here's the thing, I had a friend put together the computer since I've never done it before and he's had a lot of experience. Is there any thing I should look for if I reseat it myself?
a b à CPUs
a b K Overclocking
July 23, 2009 8:17:26 PM

^ you cant really tell, because it will be something like when he put it down there were airbubbles stuck in the thermal paste. So when you take it off you wond be able to tell what went wrong.
July 24, 2009 4:06:30 AM

Lower your CPU voltage. You don't need it anywhere near that high. I have the same mobo/proc/video card/ram. I'm running it at 4.0GHz on 1.22 V. During my overclocking I had mine at 1.35V too at one point, and lowering it saved me easily 8C as I recall.
July 24, 2009 7:27:30 AM

Once you've stabilised the overclock, drop the voltages again as far as possible.
July 24, 2009 6:07:06 PM

I turned my computer sideways just to check if the cooler was in contact with the CPU, and my load temps dropped 40C.

At 2.66GHz it runs 30C idle, and 55C 100% load in prime95.

At 3.8GHz it runs 40C idle, and 70C (using speedfan for all of these) at 100% load in prime95 Are these temps pretty good then? I'm guessing this means it needs to be tightened up.
July 24, 2009 6:39:45 PM

First, did you lower your CPU voltage like we said? If not, do so.

Second, if by 'turning sideways' you mean you laid your computer flat on it's side and saw those temperature improvements, it sounds like the heatsink was possibly pulling the top half of its base away from the CPU while the case was standing up, and an increase in mounting pressure is in order, as you noted.
July 24, 2009 6:39:56 PM

Is it possible to reseat it without taking everything out, or is that only when replacing it with another cooler?

btw my CPU voltage is at 1.18. However, earlier when it was standing up it seemed to make no difference which is why I didn't note it.
a b à CPUs
a b K Overclocking
July 24, 2009 7:01:31 PM

wanderer said:
Is it possible to reseat it without taking everything out, or is that only when replacing it with another cooler?



Thats kind of obvius....

If you had to screw it to the back and it had a backplate then yes, you will have to take everything out.
July 24, 2009 8:31:04 PM

The only thing I don't get is why it's at 70-75C at 3.8GHz in prime95. I've read a few other posts, and one guy with the same CPU and cooler as me was only at 55C at 3.8GHz in prime95. Will the temp go down even more when it's reseated or is there possibly an underlying problem?
July 25, 2009 2:08:30 AM

Assuming it's seated badly, and you reseat it better, temps will go down, yes.

On another note, it seems all the temperature readings in this thread are from Speedfan, correct? If this is the case, why don't you go get Realtemp (a generally more accurate program) and tell us what the cores are at after a while on Prime95 Small FFT.

As far as one guy who runs 55C at 3.8GHz with the same heatsink, he is most likely:
A) Lying
B) Wrong
C) Receiving incorrect information from a program
D) Using extreme (read: unreasonable) measures (ie. fan speed/ambient temps) to lower temps
a b à CPUs
a b K Overclocking
July 25, 2009 6:17:04 PM

Just want to throw out there that he probably has lower voltage to get to 3.8.

doi!
July 30, 2009 1:44:26 AM

Adjust your CPU voltage. my 920 (d0) is 20 x 200 and only uses 1.22 vcore. QPI is 1.22 and IOH is 1.1. I may have recieved an extremely good chip, but your vcore still seems high.
July 30, 2009 7:18:56 PM

wow.. I pretty much have the same settings. I am getting 46-49 idle. Under normal load goes upto 50-60. Prime95 pushes it to 85-89 at 100% load. Intel burn test takes it to around 75 86. I am using Arctic silver and reseated the cooler already once. My Lenove 3000 with core 2 Duo idle's at 45 so I dont think core i7 920 is too hot idling at 45-50. Plus I only have 2 x 120mm fans in my Antec P182 case one on top and one in the back. I still have to buy and add 2 fans in front for intake.


Intel Core i7 920 (D0 stepping) running @ 4.0
ASUS P6T Deluxe V2 LGA 1366 X58
OCZ Gold 6GB DDR3 1600
Sapphire Radeon HD 4830
Enermax 750W PSU
WD Caviar Black 1TB 7200 RPM
LG Dvd burner
Cooler Master V8

I used these settings to clock it at 4.0Ghz

Ai Overclock - Manual
CPU Ratio - 20 (Ratio is now set to Auto to turn Speed Step On)
Intel Speedstep Tech - Disabled (for over clocking)
Speed Step Enable afer over clocking, minimal load or idle temp = 46c-50c
BCLK - 200
PCIE - 100
DRAM Frequency - DDR3 1602MHz
CPU Voltage - 1.225
CPU Pull - 1.82
QPI/DRAM Voltage - 1.225
DRAM Bus Voltage - 1.64
C1E Support - Disabled
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