E6750 & Gigabyte P35C-DS3R Overclocking Thread

[MaDMvD]

Ended up going with the Zalman CNPS9700 - it looks like a beastly cooler. I expect to receive it tomorrow or Friday, I'll update you guys on the results.

http://www.newegg.com/Product/...p?Item=N82E16835118019

I decided to jump on it when I saw it going for $54.99 w/ free shipping. Minutes later, it jumped to $59.99 shipped, which is a deal in itself!

 

[fausto412]

Originally posted by: MaDMvD
Ended up going with the Zalman CNPS9700 - it looks like a beastly cooler. I expect to receive it tomorrow or Friday, I'll update you guys on the results.

http://www.newegg.com/Product/...p?Item=N82E16835118019

I decided to jump on it when I saw it going for $54.99 w/ free shipping. Minutes later, it jumped to $59.99 shipped, which is a deal in itself!

only thing i don't like about that cooler is that you can't change the fan. i can get just about any 120mm fan for my scythe ninja. let us know how it works out.

 

[MaDMvD]

only thing i don't like about that cooler is that you can't change the fan. i can get just about any 120mm fan for my scythe ninja. let us know how it works out.

Yeah, I saw comments about that very fact when I was reading up on it. I guess I'll just cross my fingers and hope the fan will last a while, which it should. Since I'm already posting a reply, I might as well bring up something that is baffling me at the moment. Since about 2 days ago, my CPU has been idling at much lower temperatures than before. At first, I thought CoreTemp was acting funny, so I reinstalled it and I'm getting the same results. I running my E6750 @ 3.6GHz @ 1.392v and idling at 37C using the stock Intel fan, when it used to idle at around 49C. I am very paranoid to stay at this frequency since I think I'm being told lies by CoreTemp, Everest, SpeedFan, etc. The ambient temperature has not changed dramatically in my apartment from 2 days ago and I really can't believe what I'm seeing. Severe load brings me to about 59-60C but usually it stays in the 37-45 range. Is this right, or am I right to be doubting these temps? Why did they drop so significantly over 2 days or so? I didn't change anything...

 

[MaDMvD]

Come to think of it, I did update my BIOS to F9, but I can't remember whether that was before or after I noticed the huge shift in temperatures. Like I said, I used to idle @ 49-50, now I barely hit that range even at load. WTF?

 

[fausto412]

Originally posted by: MaDMvD

only thing i don't like about that cooler is that you can't change the fan. i can get just about any 120mm fan for my scythe ninja. let us know how it works out.

Yeah, I saw comments about that very fact when I was reading up on it. I guess I'll just cross my fingers and hope the fan will last a while, which it should. Since I'm already posting a reply, I might as well bring up something that is baffling me at the moment. Since about 2 days ago, my CPU has been idling at much lower temperatures than before. At first, I thought CoreTemp was acting funny, so I reinstalled it and I'm getting the same results. I running my E6750 @ 3.6GHz @ 1.392v and idling at 37C using the stock Intel fan, when it used to idle at around 49C. I am very paranoid to stay at this frequency since I think I'm being told lies by CoreTemp, Everest, SpeedFan, etc. The ambient temperature has not changed dramatically in my apartment from 2 days ago and I really can't believe what I'm seeing. Severe load brings me to about 59-60C but usually it stays in the 37-45 range. Is this right, or am I right to be doubting these temps? Why did they drop so significantly over 2 days or so? I didn't change anything...

umm, those temps are odd on stock cooling. i mean i nomally get 40C at idle and 60 load on my scythe ninja, same overclock as you.

 

[fausto412]

Originally posted by: MaDMvD
Come to think of it, I did update my BIOS to F9, but I can't remember whether that was before or after I noticed the huge shift in temperatures. Like I said, I used to idle @ 49-50, now I barely hit that range even at load. WTF?

maybe the bios update fixed something.
50C idle temp seems pretty damn high even for a stock cooler. my wife's e4300 idle temp is 40C also.

where did you get f9 bios?

 

[MaDMvD]

umm, those temps are odd on stock cooling. i mean i nomally get 40C at idle and 60 load on my scythe ninja, same overclock as you.

Exactly. It's making me really paranoid. I'm almost ready to flash back to F8 and see what happens. I've checked virtually every part of Windows that has CPU speed information, and they all say 3.6GHz, including every overclocking tool I have. Everest's synthetic benchmarks are through the roof. I come in #1 compared to every other example PC in their database, except for RAM latency, where I come in at #2. This is very strange.

 

[MaDMvD]

maybe the bios update fixed something.
50C idle temp seems pretty damn high even for a stock cooler. my wife's e4300 idle temp is 40C also.

where did you get f9 bios?

It could have, but I also think it may have screwed up the temperature sensors, in which case, I'm getting 15C too low, which would suck. I have to P35, not P35C which explains the F9 BIOS. Gonna get something to eat, be back a little later. Thanks for helping out!

 

[fausto412]

Originally posted by: MaDMvD

umm, those temps are odd on stock cooling. i mean i nomally get 40C at idle and 60 load on my scythe ninja, same overclock as you.

Exactly. It's making me really paranoid. I'm almost ready to flash back to F8 and see what happens. I've checked virtually every part of Windows that has CPU speed information, and they all say 3.6GHz, including every overclocking tool I have. Everest's synthetic benchmarks are through the roof. I come in #1 compared to every other example PC in their database, except for RAM latency, where I come in at #2. This is very strange.

well what i meant when i said it's odd it's that the top temp on 3.6ghz OC with the stop cooler is about 60C...impossible

 

[MaDMvD]

My girlfriend brought up a good point, although I don't know if it holds truth in this scenario. I live in Florida, and we just got a nice cold front about 2 days ago, which brought temperatures down to the 40's at night. Would a decrease in humidity outside make a difference inside? The AC thermostat is showing ~72F, but it drops to about 68F at night. This is no different than any other night (because AC stays on most of the time), but maybe that cold front could have contributed to this somehow - it's the only quasi-logical explanation I have at this point...

 

[VirtualLarry]

Had anyone had a problem, that when overclocking and testing stability with Prime95, the system just restarts, instead of seeing an error in Prime?

I have a GA-P35-DS3R, E2140 @ 3.28. I was at 1.35v, but due to the restarts, I increased the vcore and am now at 1.425v in BIOS, and it seems to have stopped the restarts, although my CPU is reading a toasty 66C in CoreTemp now.

It strikes me that something is wrong with the mobo, if it spontainously restarts, instead of just erroring.

 

[Conjugal Visit]

I'm thinking Ram, Larry. Upon restart, I'm thinking you boot right back onto your desktop like nothing happened? Done some memtest runs on the Ram?

Regards,

Edit - just saw your separate Ram test thread...so it would appear it is the Ram, yes?

 

[MaDMvD]

Just wanted to let you guys know I just tried raising my E6750 @ 3.6GHz to 3.8Ghz - no luck. I am not sure if it's because I'm not using enough voltage or if my RAM is holding back. I stopped at 1.45v because I became concerned about the safe voltage limit. I've read of people clocking these G0's up to 1.5+... As for the RAM, I'm currently running at 900MHz 4-4-4-12 stably. It seems like if I bump it to 950MHz, not even 5-5-5-18 will go very far beyond POST. I'm just unsure as to what's holding me back...

 

[VirtualLarry]

I don't think it's the RAM - why would increasing the CPU's vcore fix the problem, if the problem were the RAM?
I don't think one bad spot on the RAM would cause a reboot, I would think it would cause a BSOD or something instead.

 

[Conjugal Visit]

Originally posted by: VirtualLarry
It strikes me that something is wrong with the mobo, if it spontainously restarts, instead of just erroring.

Again, what makes you think it's the mobo? You've already posted that you're having mem errors when you test. And to say that the mobo is spontaneously restarting, well that's not quite accurate, is it? Your mobo is restarting when you run a rigorous stress test on a CPU spec'd at 1.8, and overclocked to 3.28 - which is an 82% overclock?? But you're thinking it's the mobo?

Let us know what you come up with Larry when you sort this out.

Regards,

 

[mrfatboy]

I bet it's your Zalman 9700 holding you back. You should have gotten the Tuniq Just kidding

I used to run my 6750 at 1.4625v. That voltage is fine for 24/7 also. You can also try upping the (g)mch by a notch and see if that helps.

I just redid all my temps. My ambient was 73F. Your temps should be very close to these. Check the OP in this thread. The temps are there but here is a copy.

@3.6 and non stressed(23C (73F) ambient). My speedfan temps are:

NB 40C
HD0 25C
Core 0 31C
Core 1 31C
CPU 38C
Case 20C
8800gts 50C

@3.6 and orthos stressed (23C (73F) ambient). my speedfan temps are:

NB 42C
HD0 25C
Core 0 55C
Core 1 55C
CPU 38C
Case 48C
8800gts 50C

 

[biltong]

@MaDMvD - Did you ever go back and try the earlier BIOS ?

With the P35C BIOS, they changed the fan control after F4 so that the Fan runs a lot slower under PWM or Voltage control. Just wondering if they did the same thing with the P35 BIOS. Might explain the change in temps.

 

[MaDMvD]

Originally posted by: biltong
@MaDMvD - Did you ever go back and try the earlier BIOS ?

Nope, I'm so impressed with these temps that I'm scared to touch anything now. Plus, my new heatsink arrives today so I'll be installing that later. I'll make sure and get a good temperature comparison chart going (stock Intel fan vs. Zalman CNPS9700).

 

[Vipeax]

Hey,

I am new to posting on these forums (only posted on tweakers.net earlier so).
Here is my current setup:
E6750 @ 3.6 GHz / 450 x 8
GA-P35-DS3P
Kingston HyperX 4GB PC6400 - 800Hhz @ 5-5-5-12 @ 900
Scythe Infinity
Asus 8800GTS (640MB Edition)

Click for temps (100% load)

My ram isn't really overclock ram. I have had my ram for almost a week now, but I have already ordered new ones now (Crucial Ballistix). The CPU was Orthos stable at a friend of me, who has TXDD2048M1200HC5DC memory, booted at 4.1GHz. So I really can't wait for the new ram to arrive and give it a nice overclock.

I still need to get a screw/bolt mounting for my infinity, so who knows what that will do to the temps

 

[MaDMvD]

Correct me if I'm wrong, but based on that screenshot, aren't you stressing RAM and not the CPU? Try running the CPU stress test and then check your temps.

 

[Vipeax]

Actually it is the same.
The CPU & Ram stresses both.
Here you go:
Click

 

[myocardia]

Originally posted by: MaDMvD
Correct me if I'm wrong, but based on that screenshot, aren't you stressing RAM and not the CPU? Try running the CPU stress test and then check your temps.

Also, run it longer than 46 seconds. Like 30 minutes and 46 seconds.

 

[Vipeax]

i have done a stress for 10 hours and 39 minutes, I will post a screenshot tomorrow for you. (Didn't screen that one).

 

[MaDMvD]

@biltong:

I just flashed back to F8 and BAM! Back to idling at 49-51C. A quick Orthos loads now reaches 66C easily. Everything shows the same temperature - CoreTemp, Everest, SpeedFan... I'm about to re-flash to F9, but now 2 major questions loom.

1) Does F9 actually provide some kind of optimization that allows the processor to work more efficiently/somehow keep things cooler? (Highly doubtful)
2) Does F9 screw up the temperature sensor's accuracy? (Also doubtful, but not as much as #1)

 

[MaDMvD]

Sure enough, I'm back on F9 and the idle temps are now 38-42C. Just ran another quick Orthos test and it topped out at 62-63. I'm very confused.