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My i5-2500k experiance/questions

post #1 of 11
Thread Starter 
Here's my setup:
-ASUS P8P67 Pro
-Intel Core i5 2500K
-G.SKILL Ripjaws X F3-12800CL9D-8GBXL
-Coolermaster Haf 922
-Scythe Mugen 2 REV.B.

I receive the CPU cooler a bit later, so I had the system running with stock fan prior that.

I never installed a CPU cooler backplate before and let me tell you it has been the worst experience I ever had installing computer parts. I though Intel stock fan had a crappy design, but this is much much worse. First, I had to remove the motherboard from the case because the screw holes aren't accessible from the back with my case. Then, you are supposed to let the motherboard float in mid-air while you put thermal paste, try to align the cooling block weighting a ton and trying to screw the whole thing from the bottom while trying not to move the cooling too much not to mess the thermal paste... wow. I think I managed to do it pretty well anyway.

First question. The Scythe fan is designed to push air IN the cooling block, and the only possible place to mount it is in the back of the case, a few inches next to the chassis fan blowing out of the case. Is this normal to have two fans in different directions so close?

Second question. I got CPU FAN error after installing the Scythe. I just set the low rpm limit to 300rpm instead of 600rpm since it was running at 550. Is this safe/normal?

Using bios 1053, default settings, reading temps with RealTemp
With stock cooler I had about 30degree idle, 70degree load.
With Scythe cooler, I have 37degree(?) idle, 52degree load.
That's normal numbers? SpeedFan actually show like 15degree lower for cores.

Ok, so I get in the bios, set the overclock profile to X.M.P. and ram get to 1600mhz fine. Then I set Turbo Ratio setting for all core and change the maximum turbo ratio to 40 for now. BCLK/PEG frequency is set to 100.

I reboot, try again. Under load, while the multiplier is set to x40, CPU-Z tells me it lowered the BCLK to 80mhz, and the total stayed at 3300mhz.

I know I have to change a setting to disallow automatic BCLK changes, but I'm not sure what. Is it OC Tuner??

I did not disable power saving things (SpeedStep/C1E/Load-Line Calibration). I actually WANT the multiplier to revert to low speed when I'm idle, I don't want it to waste useless power do I? This is a 24/24 computer.

I also wonder about the "CPU Offset Voltage". I know you need to increase the voltage when going in higher clock so it don't crash, but why set it manually? Doesn't "Auto" just adjust itself and do the trick? Seems to be working fine to me. (currently go from 0.968V idle to 1.288V load).

Finally, do you think it's possible to aim for around 4.5ghz and staying safe? Thanks and sorry for so many questions.
Edited by Dunge - 1/27/11 at 6:01pm
post #2 of 11
Quote:
Originally Posted by Dunge View Post
First question. The Scythe fan is designed to push air IN the cooling block, and the only possible place to mount it is in the back of the case, a few inches next to the chassis fan blowing out of the case. Is this normal to have two fans in different directions so close?
Sounds like you have it mounted backwards. The fan should be pushing air into the heatsink, and the exahust fan of the case should be pulling that air in and pushing it out the case.

Quote:
Originally Posted by Dunge View Post
Second question. I got CPU FAN error after installing the Scythe. I just set the low rpm limit to 300rpm instead of 600rpm since it was running at 550. Is this safe/normal?
Idle temps may go up as a result.

Quote:
Originally Posted by Dunge View Post
Using bios 1053, default settings, reading temps with RealTemp
With stock cooler I had about 30degree idle, 70degree load.
With Scythe cooler, I have 37degree(?) idle, 52degree load.
That's normal numbers? SpeedFan actually show like 15degree lower for cores.
Seems related the above question.

Quote:
Originally Posted by Dunge View Post
I did not disable power saving things (SpeedStep/C1E/Load-Line Calibration). I actually WANT the multiplier to revert to low speed when I'm idle, I don't want it to waste useless power do I? This is a 24/24 computer.
I left them enabled too. Only thing I changed was to have the fan 100% all the time. Just my personal preference. What country do you live in where there are 24 days in a week?

Quote:
Originally Posted by Dunge View Post
Finally, do you think it's possible to aim for around 4.5ghz and staying safe? Thanks and sorry for so many questions.
I wouldn't shoot for an overall goal. I would shoot for hitting 70C or less. I personally settled for 65C. Let the chip decide on how far it'll go.
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Scorpion
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post #3 of 11
Thread Starter 
That's exactly what I said, one chassis fan pushing air out of the case and the cpu fan into the cooling with a few inches between. out |<- ->| cpu

And obviously I meant 24h in a day, not in a week, as in "always on".

I still want to know if my setup is ok, if current number seems fine, how to block the BCLK to 100mhz and about auto voltage. Thanks
post #4 of 11
Thread Starter 
Hmm, CPU-Z 1.56 on the official website gives me these lowered BLCK result, but CPU-Z 1.56.1 from the "CPUID Reviewer Kit" on their news page gives me 100mhz BLCK with a 4000ghz core speed. What to believe now?
post #5 of 11
I was just kidding with ya about the 24/24 thing.

I would go with the 1.56.1 version. They haven't released a new version that's fully compatible with SB yet. The 1.56.1 is closest. Although I've seen .2 and .3 floating about.
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post #6 of 11
Thread Starter 
Since x40 was working fine, I tried x45 and set the voltage offset to +0.15 as I saw in a few threads. Instant BSOD when entering Windows. So I put the voltage back to Auto, and dropped to x44 just to let it breath. Full stability, OCCT runned overnight.

Core temperature reached a high (well stayed at) 70degree at 4400mhz, 1.38V vcore max. Idle it return to 35degree, 1600mhz, 1.03vcore.

Again, are this safe/correct? What should I try next?
post #7 of 11
Quote:
Originally Posted by Dunge View Post
Since x40 was working fine, I tried x45 and set the voltage offset to +0.15 as I saw in a few threads. Instant BSOD when entering Windows. So I put the voltage back to Auto, and dropped to x44 just to let it breath. Full stability, OCCT runned overnight.

Core temperature reached a high (well stayed at) 70degree at 4400mhz, 1.38V vcore max. Idle it return to 35degree, 1600mhz, 1.03vcore.

Again, are this safe/correct? What should I try next?
I would never personally have any of my voltages set to auto, but everything you've mentioned here is well within safe limits.
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post #8 of 11
Thread Starter 
Well yeah I would like to set the voltage manually. 1.38 seems high, I wouldn't want to go over 1.3 really, well that's based on what I read in other threads. I also don't know how the voltage offset is supposed to work, since +0.015V obviously didn't. I could only find threads about people telling they don't understand how it works, or simple overkill values to reach 5ghz, but no answer on how to use it normally.
post #9 of 11
With the Mugen 2 installed, did you have any problems with ram clearance?
Are all four slots free?
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post #10 of 11
Thread Starter 
As I already said twice, the fan clipped to the Mugen is put toward the back of the case, because on the other side (the front) it touch the RAM. Seems fine. Only problem is the back chassis fan is just next to it, pushing in the opposite direction. But it seems fine anyway.
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