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Old February 17, 2011, 09:16 PM
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Default Overclocking on a LGA 775 Platform

I've got this older computer that I'd like to overclock and tweak to get a little more performance out of, the problem is I have no idea how overclocking works with the parts this thing has.

CPU: Intel Core 2 Duo E6750 @ 2.66 GHz
Motherboard: ASUS P5N-D
Video Card: XFX HD 5870

Here's a screenshot of the current setup:



I'd like to call attention to GPU-Z saying my 5870 is running at 900 MHz core clock, while both CPU-Z and ATI Overdrive says the core clock is running at 400 MHz. What's going on? How do I overclock this CPU and memory so I can milk out some more performance? Any advice would be greatly appreciated.

Thanks in advance!

-Edit: Also 400 MHz on the memory? Is that normal?

Last edited by Dreamsickle; February 17, 2011 at 09:27 PM.
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Old February 17, 2011, 09:52 PM
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nice!

before you dwell into oc'ing, what psu do you have in there?

just work your ram speed down, like make it go 700 mhz, and up your fsb.

that nv chipsetted board will be a bit more difficult to oc than a comparable intel chipsetted board,

but you should be fine for 3-3.2 on not too much voltage

dont worry about the card. get everest if youre unsure and then run furmark or such and watch the clocks go up
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Old February 17, 2011, 09:58 PM
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nvidia chipsets were easier to overclock than intel due to a lot more functionality in the bios.
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Old February 18, 2011, 01:38 AM
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I used this version to run my E6600 (2.4) up to 3.2 -- temp limited because I have a case with iffy inflow characteristics.
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Old February 18, 2011, 07:09 AM
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My PSU is a 750w Silencer 80 Plus, which is made by OCZ (I think). My CPU cooler is a Thermalright something or other. It's pretty thick, with what looks like 3 pipes per side (it's been a long time since I built this thing).

As I mentioned in the title, I've never overclocked this board or cpu before, so if you could be as specific as possible about how I would go about adjusting memory or cpu settings that would be excellent. BIOS doesn't have nearly the options I'm used to seeing from X58 or P67 boards, coupled with the i5's and i7's.

-Edit: Running at 3.2 GHz now @ 1.42v Vcore, 1.44v on the NB, 1.44v HT, SB on Auto, 1600 FSB, and RAM unlinked. I thought the memory frequency would go up on their own as the cpu was overclocked? Was reading some information saying the vdroop on this board was particularly bad, so the voltage on vcore had to be increased more to compensate.



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Last edited by Dreamsickle; February 18, 2011 at 07:44 AM.
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Old February 18, 2011, 07:28 AM
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Your PSU and cooling should be fine just watch the temps when your OCing. Get Real Temp, it works the best for Intel chips, to check it. AutoTune and CPUz are likely reading the current values since most modern cards choke the speeds when they are idle. There are some great guides around about overclocking 775, its a little more complex than can really be explained here although I'm not sure how indepth you want to get into it.
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Old February 18, 2011, 07:50 AM
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Yeah, I have Real Temp v3.67, running at 40°C idle, haven't tested with Intel burn Test, Prime95, etc etc. I'm not a hobbiest overclocker, I just want to get a little better performance while gaming.
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Old February 18, 2011, 07:51 AM
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Quote:
Originally Posted by Rasparthe View Post
Your PSU and cooling should be fine just watch the temps when your OCing. Get Real Temp, it works the best for Intel chips, to check it. AutoTune and CPUz are likely reading the current values since most modern cards choke the speeds when they are idle. There are some great guides around about overclocking 775, its a little more complex than can really be explained here although I'm not sure how indepth you want to get into it.
CoreTemp is more ideal for 65nm chips over the 45nm.

Overclocking a 775 chip was actually the easiest in the group as all you really ever had to do was drop your ram speed to a lower spec.. up your FSB to a higher spec and make sure your voltages were ok.

Most Intel chips are capable of 1.4v for the CPU and the 65nm were notorious for being able to go 1.45 or even 1.5v without flinching.

65nm chips were also good in the sense they were able to take heat better and not fry themselves so 80' temps on a 65nm chip was considered ok!
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Old February 18, 2011, 10:13 AM
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I'm concerned about the core clock on my XFX HD 5870. ATI Overdrive, CPU-Z, even Real Temp says the core clock is 400 MHz. Only GPU-Z says its at 900 MHz.
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Old February 18, 2011, 11:29 AM
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The core clock of you GPU runs at 400Mhz while idle and ramps up to 900 under 3D load. You GPU ram does something similar.
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