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Your sticky needs updating oc'ing intel cpu's

post #1 of 6
Thread Starter 
Hey,

Your guide is fine for Northwood 478's but doesn't apply to 775 socket T?

Well, I want an Intel cpu. The last time I got one it was easy 2.4 c 400 fsb to 533 fsb @ 3.2ghz, got pc 2700 and everthing running at stock speeds and the cpu oc did wonders.

Now I was going to get a P4 mb with support for 1066 fsb pick up the PD 920, 800 fsb, change the bus to 1066, that would be 3.7 ghz and call it a day. From what I hear the PD 920 will do well over 4 ghz on stock hs&fan, so any extra oc'ing would be great.

But I am told that that doesn't work any more and the most I will get on the mb is like 250 fsb or so? Is that correct, I have looked and looked and looked but no one has explained how 775 ocing is different from northwood oc'ing. Can I just set the fsb to 1066 and the processor boot at 3.7ghz?

I prefer the verbose answer, as I would like to understand Why?

here is the system I was going to order today, but not so sure now. I was expecting 3.7 ghz would be a given and that anything over would be gravy. I do not want to speend extra money on new hs&fan or $200 mb. I am the value over clocker not the max speed at any cost type.

Pentium D 920 with mb's listed in order of preference
http://www.newegg.com/Product/Produc...82E16813131538
http://www.newegg.com/Product/Produc...82E16813138276

Thanks much for any help,

MJM
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post #2 of 6
Well all you have to do is what I did, pick up a mobo that supports 1066FSB, this will guarantee that it will OC to 266FSB with stock voltages....my mobo is the Asus P5N32-SLI Deluxe and I absolutely love it, also go to User CP at the top of the screen and fill out your system specs so it will show them like mine below.

Quote:
But I am told that that doesn't work any more and the most I will get on the mb is like 250 fsb or so? Is that correct, I have looked and looked and looked but no one has explained how 775 ocing is different from northwood oc'ing. Can I just set the fsb to 1066 and the processor boot at 3.7ghz?
Where did you hear this? Overclocking a 775 is just like overclocking a Northwood (478) but you can't set it to 1066 but all you have to do is overclock the FSB to 266 and you're there Just be sure your RAM is up to the task as at 266FSB you'll be running at DDR2 533 speeds.
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post #3 of 6
http://www.newegg.com/Product/Produc...82E16813131564

I know you said no $200 motherboards but I really would consider it, you don't want to skimp on a motherboard, plus this one has all the future proofing you'll ever need and SLI X16 (able to run 2 Nvidia video cards in SLI at full 16x PCIe bandwidth)
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post #4 of 6
Thread Starter 
thanks for the reply, So you did exactly this, with your own rig?

So you are saying that any mb (both of the ones I linked will) that supports 1066 fsb will oc any processor to that speed. Some one was telling me that intel locked the chips or chipsets at a 22% max overclock or some such.

So he was all wet? If the mb and cpu will go to 266 fsb which is the 1066 fsb setting, along with the ram, then bang you are at 3.7 ghz? If the cpu will continue to oc you go from there?

If so nothing much has changed from my 2.4ghz P4? Funny tho when I looked at all the reviews on mb's and processors etc none did that or mentioned trying it. Also my friend is pretty up on intel processors and oc'ing.

I have a 7800GTX on my amd rig and a sli mb and that is my main games rig, this one is for other things.

thanks

any one else have any input on this?

MJM
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post #5 of 6
I am currently running my 920 at 280 FSB.....and my memory at 373.......so that seems to disprove that theory.

It's stable under a 2 hour dual stress test (2 instences of Prime95 running at the same time), just need to set aside the time to run the required 6 hour test and show my

3.9Ghz at 1.2875v on the chip and 2.0v on the memory, once I lap the heatsink and get some new AS5, I'll make a run for 4...........
post #6 of 6
Thread Starter 
Cool Thumper


Thanks
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