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post #11 of 35
Quote:
Originally Posted by RPIJG View Post
That solved the problem.

So I'm pretty comfortable with the CPU OC at this point, I'm going to run stability overnight tonight, just to make sure everything is A-OK, but 4GHz doesn't seem to bad to me.
Pentium D 9xx series are actually GREAT overclockers and I wouldn't be on bit surprised if you nailed 5Ghz on that particular chip as long as you give it a little juice. Also keep in mind the 680i has a some pretty hefty vdroop so if you set 1.4v in BIOS, it'll probably end up like 1.36 or less under load.

I say keep pushing! You're temps are great and there is a TON of room on that chip.
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post #12 of 35
Thread Starter 
can you explain vdroop? I haven't had to change the Vcore yet, but I'm assuming what you mean is that what the BIOS says and what the sensor say are different? I'm new so be gentle
    
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post #13 of 35
Quote:
Originally Posted by kidwolf909 View Post
Pentium D 9xx series are actually GREAT overclockers and I wouldn't be on bit surprised if you nailed 5Ghz on that particular chip as long as you give it a little juice. Also keep in mind the 680i has a some pretty hefty vdroop so if you set 1.4v in BIOS, it'll probably end up like 1.36 or less under load.

I say keep pushing! You're temps are great and there is a TON of room on that chip.
+rep

Listen to this guy, he knows what he's talking about.
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post #14 of 35
Quote:
Originally Posted by RPIJG View Post
can you explain vdroop? I haven't had to change the Vcore yet, but I'm assuming what you mean is that what the BIOS says and what the sensor say are different? I'm new so be gentle
Haha, yes vdroop is the difference between the voltage setting in BIOS and the actual voltage being fed to your components, typically when the system is experiencing load is when the difference is HIGHLY noticeable.

I built an E6600/680i build and a vcore of 1.45 in BIOS yielded an actual vcore of 1.34v under load... it's just the way the motherboard works, unfortunately.

EDIT: Thanks Sazar I try.
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post #15 of 35
Quote:
Originally Posted by overcrash View Post
Pentium D series are not decent overclockers IMAO, e21xx, e4xxx and e6xxx are much better in price/performance terms . I don't think you can learn much from an old processor, but that's my opinion, who AM I to tell you what to do
There are a boatload of people who will disagree with you. Almost every one of those 9xx pentium D's will make it to 5ghz including my 920. I don't see any reason that 940 wouldnt do as well. You will need to give it volts and keep it cool though. And turn off C1E and EIST to keep it from throttling up and down.

With a DS3 and water cooling my 920 was easily at 5ghz and above on 1.6v.

Edit now that being said, it won't compete with most C2D's but who cares when you can overclock it to 5ghz. At that speed, my superpi 1mill was around 27seconds. I know that doesnt beat a C2d, but for the $90 I paid for it you can't beat it. One more note, I run everything at stock now and can't tell the difference on my desktop.
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post #16 of 35
Thread Starter 
So where is the most reliable place to find out what the actual Vcore is, CPU-Z gives me a 1.24, nTune says 1.2875, Speedfan confirms CPU-Z so I'm guessing that's where I'm at.
    
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post #17 of 35
Quote:
Originally Posted by RPIJG View Post
So where is the most reliable place to find out what the actual Vcore is, CPU-Z gives me a 1.24, nTune says 1.2875, Speedfan confirms CPU-Z so I'm guessing that's where I'm at.
not necessarily true. Core temp, cpuz, and crystal cpuid all told me one thing, when my motherboard monitoring software told me another. Turns out, core temp, and cpuz just read the voltage setting, they don't actually monitor the voltage input to the chip, that's what your motherboards winbond(or whatever you have) chip does. When I finally installed Everest Ultimate, it confirmed the readings uguru was giving me.
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post #18 of 35
Quote:
Originally Posted by ryboto View Post
not necessarily true. Core temp, cpuz, and crystal cpuid all told me one thing, when my motherboard monitoring software told me another. Turns out, core temp, and cpuz just read the voltage setting, they don't actually monitor the voltage input to the chip, that's what your motherboards winbond(or whatever you have) chip does. When I finally installed Everest Ultimate, it confirmed the readings uguru was giving me.
I would trust speedfan actually... It's the closest to actual for me (at least it was spot on when I manually test my CPU voltage vs. CPU-Z, PCProbe and Speedfan.)
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post #19 of 35
PC2 4200 is good for up to 266fsb (1066 for nForce) on a 1:1 ratio. And that 940 can easily be pushed to that on a 1:1, specially with that cooler. I'm thinking 275fsb should be the minimum for that cooler, and that's 1100 for nForce.

My Pentium D 945 (3.40ghz stock) does 4.51ghz easy and with EIST and C1E turned on. With a Tuniq Tower 120.

Benches fine at 4.51ghz:



http://valid.x86-secret.com/show_oc.php?id=110762

Notice that at idle, the CPU's multi drops at x12. Something I also do with my E6600 at 350fsb.
post #20 of 35
Quote:
Originally Posted by overcrash View Post
Pentium D series are not decent overclockers IMAO, e21xx, e4xxx and e6xxx are much better in price/performance terms . I don't think you can learn much from an old processor, but that's my opinion, who AM I to tell you what to do
What are you smoking iv had my pd up to 4800mhz and iv seen posts in hwbot as high as 5500mhz. And i run it at 4500 daily on 3dmark06 my cpu score is right inline with a e6600 so if you can manage 4300-4500mhz you should have good perf.
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