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How to get Q6600 to a stable and safe 3.2GHz?

post #1 of 10
Thread Starter 
Hi guys,

I have an ASUS P5K-E WIFI motherboard and I'm looking to move my Q6600 (G0 stepping) to 3.2GHz (400MHz FSB x 8.0 multiplier). Im currently at 3.0GHz and did this by simply moving the FSB to 333MHz. Didnt touch anything else (i.e. Vcore, etc.) in the BIOS as Prime95 v25.6 was running for 4hrs no errors so I assumed it was stable.

Now I want more... haha. I intially tried to move the FSB to 400 and move the multiplier down to 8.0. Left everything else in the BIOS alone. But I got a BSOD on Prime95 about 5mins into running. Is that indicative of not enough Vcore voltage? Or maybe NB voltage?

I'd like to keep the voltages down as much as possible to get to 3.2GHz. What do you guys recommend that I change in order to run a stable 3.2GHz?

Thanks.
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post #2 of 10
Try 1.4Vcore. If its stable lower it one notch and see if its still stable.
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post #3 of 10
Increaseing FSB past a certain point requires the adjustment of various other voltages in the BIOS besides CPU vCore. Try raiseing the multiplier back to x9 and then set FSB to 356. Be sure to increase CPU vCore to 1.4v and MCH/Northbridge vCore to 1.45v as well.
post #4 of 10
Thread Starter 
Thanks guys for the quick replies! So basically it looks like I most likely would need to change the vCORE and NB Voltage settings to get to 3.2GHz. Which should I try first? What the typical vCORE neeed to get to 3.2GHz? I dont want to mess around w/ too many BIOS settings if possible.

Thanks,
HMR.
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post #5 of 10
What speed is your DDR800 memory running at? Is it now at DDR1000?

I would approach it in stages. Slow your memory down in BIOS, use the 9x multiplier to keep the FSB down, and increment the the FSB and if necessary voltage as you test processor stability. Once you found a limit, either from temperature, voltage, or stability limits, then you can address the FSB. First with the FSB, dropping the multiplier and raising the fsb. Then with the memory, changing the divider and raising the fsb.

For example, with multipler 9 and memory set to 2.0 (the lowest setting, and FSB starting at 333 (a safe 3Ghz), see if you can raise it to FSB 400 or beyond. Both should be adjustable with tools from the mb vendor. I use speedfan and OCCT. Also monitor the case temp with the video card sensor read in Riva.

Once you are there, say you are stable at 400 and not 410, then set the multipler it 8, and try advancing from there. At 400 the memory would be DDR800; if 450 worked (giving the same processor speed with an 8x multiplier), memory would be DDR900.

Then you may need to make adjustments there. In timings, since you can't go lower in speed. You may be able to go higher. However in my P35 BIOS the next step from 450x2=900 would be 450x2.4=ddr1080, a rather large jump! Of course, DDR 1066 memory should have no problem, and is not that expensive now.
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post #6 of 10
Quote:
Originally Posted by HMR View Post
What the typical vCORE neeed to get to 3.2GHz? I dont want to mess around w/ too many BIOS settings if possible.
Here's an echo for you;

Quote:
Originally Posted by t4ct1c47
Be sure to increase CPU vCore to 1.4v and MCH/Northbridge vCore to 1.45v as well.
post #7 of 10
Thread Starter 
My memory is still at DDR800. When I changed the FSB to 400MHz I changed the memory back down to DDR800 (not really keen on overclocking my memory).

Ideally I want to run the FSB and memory at a 1:1 divider (it currently is at 5:6 as my FSB is 333MHz and RAM is 400MHz). Is the P5K-E motherboard able to run a 400MHz FSB? I know 333MHz is offically supported and its stable.
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post #8 of 10
Quote:
Originally Posted by HMR View Post
Ideally I want to run the FSB and memory at a 1:1 divider (it currently is at 5:6 as my FSB is 333MHz and RAM is 400MHz). Is the P5K-E motherboard able to run a 400MHz FSB? I know 333MHz is offically supported and its stable.
The P5K-E is capable of attaining 400FSB easily enough, though as I said, you'll need to alter more than simply the CPU vCore to do this. As for running the RAM at 1:1, as long as the RAM is running equal to or faster than the CPU FSB you won't have any bandwidth issues. It's only when your RAM is running slower than the CPU that performance impacts occur.
post #9 of 10
Thread Starter 
Thanks guys. This my plan.... I will move the FSB bus to 400MHz and change the multiplier to 8.0. Then I will raise the vCORE voltage to 1.40v and do a stress test. If it fails then I will change the NB voltage to 1.45v. Will keep you guys posted.
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Intel Core 2 Quad Q6600 @ 3.2GHz ASUS P5K-E WiFi MSI GeForce 8600GT 256MB 8GB DDR2-800 RAM @ 4-4-4-15 
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OCZ Vertex 2 60GB, 2 x 320GB Seagate HDDs in RAID0 20X Pioneer DVR-217D Windows 7 Ultimate 64-bit 30" Dell UltraSharp 3007WFP-HC 
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Intel Core 2 Quad Q6600 @ 3.2GHz ASUS P5K-E WiFi MSI GeForce 8600GT 256MB 8GB DDR2-800 RAM @ 4-4-4-15 
Hard DriveOptical DriveOSMonitor
OCZ Vertex 2 60GB, 2 x 320GB Seagate HDDs in RAID0 20X Pioneer DVR-217D Windows 7 Ultimate 64-bit 30" Dell UltraSharp 3007WFP-HC 
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post #10 of 10
I use 1.3375 vcore for 8*400mhz on my q6600 completely stable.
    
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