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E8400

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April 12, 2011 6:11:32 PM

i just installed an E8400 3.0 on a Gigabyte P35C-DS3R motherboard. I had an e6750 2.66 before. I am only getting 2.0GHz from this E8400. My bus is 1333. In the BIOS it showes a CPU clock ratio of 6x, CPU frequency 2.00 (333x6). Can anyone tell me what I need to do do get this CPU to run at the corect 3.0GHz? Thankyou

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April 12, 2011 6:44:02 PM

Which version of the BIOS are you running..? As per the underlinked page, you require either the F10 or F12 version of the BIOS to support the E8400..

www.cpu-upgrade.com/mb-Gigabyte/GA-P35C-DS3R(rev._1.x).html
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April 12, 2011 6:53:40 PM

therock511 said:
i just installed an E8400 3.0 on a Gigabyte P35C-DS3R motherboard. I had an e6750 2.66 before. I am only getting 2.0GHz from this E8400. My bus is 1333. In the BIOS it showes a CPU clock ratio of 6x, CPU frequency 2.00 (333x6). Can anyone tell me what I need to do do get this CPU to run at the corect 3.0GHz? Thankyou

I have F12
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a c 81 à CPUs
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April 12, 2011 7:38:30 PM

Ok then first check if any of the BIOS features are causing the CPU to operate at lower speeds (such as ESS etc.).. Next set the multiplier ratio correctly.. Something like 333 x 9 should do it..
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April 12, 2011 8:21:31 PM

How about what does CPU-Z say in Window with something like Prime95 running? 6x (2Ghz) is idle on speedstep.
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April 12, 2011 8:32:12 PM

Emperus said:
Ok then first check if any of the BIOS features are causing the CPU to operate at lower speeds (such as ESS etc.).. Next set the multiplier ratio correctly.. Something like 333 x 9 should do it..

Emperus that was it. Changed multiplyer to 9. Thankyou for your help.
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April 12, 2011 8:34:08 PM

Stardude82 said:
How about what does CPU-Z say in Window with something like Prime95 running? 6x (2Ghz) is idle on speedstep.

yes before I changed multiplyer it said 6. Just ran prime 95 and CPU z now showes multiplier at 9. Thankyou
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April 12, 2011 8:42:34 PM

Quote:
that's one awesome chip you got there btw. Almost all of them do 4Ghz with the junkest cooling on a very hot day right in the middle of the desert

I ran Prime 95 for about 20 mins. and the hottest it got was 49. Most of the time it was 45. I just installed an Evercool Buffalo cpu cooler.
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April 12, 2011 8:58:09 PM

I'm running an E8500 at 3.8GHz with an older Zalman cooler. Normally it doesn't even move off of 40C.

Another thing you didn't mentioned if you checked or not was speedstep. With speedstep enabled it will drop your multiplier to 6 when the CPU isn't under a load, then put it back to 9 when you put a load on the CPU. If the machine is just sitting there and you check the multiplier, it will likely be at 6.
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April 13, 2011 1:18:31 AM

Wierd, if it was me, I'd reset the bios and see if the same issue came up. If the correct settings for SpeedStep didn't auto-detect you might have a corrupt bios. But if it works for you now, then it's probably not worth the hassel.
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April 15, 2011 1:07:58 PM

Best answer selected by therock511.
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