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Q9450 performance on a 780i

post #1 of 9
Thread Starter 
about the Q9450..

it has an 8x multiplier right? what are some good yet stable speeds you can get with air cooling on a 780i board?
Edited by KmK - 6/10/08 at 12:24pm
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post #2 of 9
Quote:
Originally Posted by KmK View Post
I have a couple of questions about the Q9450..

it has an 8x multiplier right? what are some good yet stable speeds you can get with liquid cooling and air cooling?

how much of a difference does the 12MB cache really make?
Yes 8x.

Ive read 3.6 is where they kinda top out at on air, sometimes 3.8 if you tweak it good. I think a few got 4.0ghz on water. You need a high rated FSB board due to the low multi.

As for the cache, I dont think you will notice much.

Good luck tho
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post #3 of 9
The chip will do 3.6 to 3.8 on air just fine.

Getting your mobo to run at or above 450fsb with a quad is a whole new problem.

Most people havn't jumped on the q9450 because of its low 8x multi.

Personally, I don't recommended the q9450. Get a q6600 if you need quad, or E8400.
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post #4 of 9
I hit 3.97 on my 9450 this morning - I think what is holding me back is my power supply - time to put a kilowatt in it this weekend On air 3.8 is easy, temps won't be a problem with a decently set HSF like a Tuniq 120 or one of those Zalman 9700's.

Since the multi is set at 8x be prepared to have an all FSB overclock and a get a board that is KNOWN to be able to hit high FSB's with a quad, this processor will not be the culprit if your overclock isn't as high as you'd like - trust me, it can handle it - just find the board that can too. I believe the world record sits on the P5E...(?)

3.8GHz is achievable on air and at stock volts after the processor burn in period has passed with a Tuniq 120 - 39C idle and 54C load - exactly what I had prior to water.
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post #5 of 9
damn....i envy your oc, i think I'm just too much of a chicken sh** to go higher than 3.4, I'm afraid I will kill my northbridge. its already at like 48 degrees C at just 400 fsb and 1.5v......maybe that's actually a low temp, I have no idea, but maybe I'll pull the trigger when I go water, or when I get aftermarket cooling for my nb.

what kind of nb and cpu voltages did you have when you ran your q9450 at 3.8Ghz on air?
post #6 of 9
At 3.8 the north bridge will run it solid at 1.55v, and a vCore of 1.3v - initially the vCore had to be set to 1.362, but after a week or two of it there I dropped it down to below stock. I'm still trying to hit the 4GHz mark, when I do that I'm putting 1.4+ vCore and 1.675v through the northbridge - what kills me is it is loading to the desktop but freezing pretty quick - I'm hoping with the power supply upgrade and a northbridge waterblock it will take care of that.

EDIT: I overclock the same way you do, except when I overclock I make gold records! I need more cowbell!
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post #7 of 9
Thread Starter 
Quote:
Originally Posted by rpm666 View Post
Since the multi is set at 8x be prepared to have an all FSB overclock and a get a board that is KNOWN to be able to hit high FSB's with a quad, this processor will not be the culprit if your overclock isn't as high as you'd like - trust me, it can handle it - just find the board that can too. I believe the world record sits on the P5E...(?)
I'm going to get an evga 780i
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post #8 of 9
Quote:
Originally Posted by rpm666 View Post
At 3.8 the north bridge will run it solid at 1.55v, and a vCore of 1.3v - initially the vCore had to be set to 1.362, but after a week or two of it there I dropped it down to below stock. I'm still trying to hit the 4GHz mark, when I do that I'm putting 1.4+ vCore and 1.675v through the northbridge - what kills me is it is loading to the desktop but freezing pretty quick - I'm hoping with the power supply upgrade and a northbridge waterblock it will take care of that.

EDIT: I overclock the same way you do, except when I overclock I make gold records! I need more cowbell!
i got a fever and the only prescription is more cowbell (or a nice oc ) baby!

hah sweet those numbers really help out a lot. but are you nervous at all about goin over that 1.4v threshold on your 45nm chip? apparently around 1.45 is the sweet spot for malfunction. you have water though so you'll probably be okay, lucky dog......
post #9 of 9
Consequently heat wouldn't be the reason for a shot processor on these 45nm's. I bench marked 3dmark06 at 3.952 again and it worked with 1.38vCore(1.36 load) and it scored something like 6400pts for the CPU score. But that's the longest I've kept it at volts that high, afterwards it goes right back to 1.3 or less at 3.8GHz.

I think I'm about to go for an entirely different water cooling setup - the one I have was really just to learn the basics of water cooling and now I'm wanting to start a ridiculous multi-loop system involving a 20 Gallon fishtank :
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