Thread: 2 of 4 cores running slower?
September 25th, 2010, 07:34 PM #1
2 of 4 cores running slower?
I am currently overclocking a QX9770 and I have it almost prime stable @ 4ghz. I am using RealTemp to monitor temps and I noticed that the temp of the 2nd 2 cores is ~5C less than the first 2. I didn't think much of it until I opened Everest for the first time and saw that it lists this:
CPU #0 X9770 @ 3.20Ghz, 4003 MHz
CPU #1 X9770 @ 3.20Ghz, 4003 MHz
CPU #2 X9770 @ 3.20Ghz, 3768 MHz
CPU #3 X9770 @ 3.20Ghz, 3768 MHz
My FSB is set to 470 and the difference is 235 which would mean that two of my cores are running at a 0.5x multiplier lower than the other two.
Anyone know why this is happening? Or is everest is even accurate?Abit AW9D-Max | E6300 | XP-120 | Panaflow 120mm | 2x 1GB G.Skill DDR2-800 | BFG 8800GT | Corsair 650w
September 25th, 2010, 08:43 PM #2
any power management or CPU Throttling functions enabled?
Could be the 3rd and 4th cores aren't running at full load, and clocked down?
not sure really, only things I can think of off hand, been a while since I've used or had a S775 system and Core 2 Quad.i7 940//Corsair H60//EVGA X58 SLI LE//6GB Corsair Vengeance 1600MHz//2x EVGA GTX 560 Ti FPB SLI//NZXT Hale82 850W//CM 690 II Advanced//Win7 64//WD 74GB V-raptor, 750GB Black, 1.5TB Green
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September 25th, 2010, 09:35 PM #3
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The temp difference is pretty common. Most multi core chips will run at different temps, even if they are all under 100% load.
Now the speed difference is odd. I've honestly never had that happen before. Maybe a power saving feature like shy said. Short of that, I'm not sure what it could be.
What motherboard are you running on?
September 26th, 2010, 12:18 AM #4
I'm running on a Biostar TP45E Combo (it was the only 775 board frys had) and I'm faily confident this is a bug with the motherboard.
If I disable overclocking in the bios the multipliers for all cores is 8x. As soon as I enable overclocking in the bios the multiplier on those 2 cores drops to the lowest, 6x.
This sucks, I bought this board 16 days ago and fry's return policy is 15 days. It would make sense to contact Biostar...Abit AW9D-Max | E6300 | XP-120 | Panaflow 120mm | 2x 1GB G.Skill DDR2-800 | BFG 8800GT | Corsair 650w
September 26th, 2010, 09:46 AM #5
It looks like Biostar has a BIOS update to correct some sort of overclocking issue.
BIOSTAR :: TP45E Combo :: BIOSWhat computer do you have? And please don't say a white one. - Sheldon Cooper
September 26th, 2010, 04:38 PM #6
Thank you for the link. First thing I did was update the bios when I got the board. Biostar has a very easy windows programs that updates via the web.
I have sent a bug report to BioStar so I'll be hoping for the best...Abit AW9D-Max | E6300 | XP-120 | Panaflow 120mm | 2x 1GB G.Skill DDR2-800 | BFG 8800GT | Corsair 650w
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