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post #11 of 40
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I just began my overclocking endeavor after reading some of the above guides. I increased my multiplier to 17, but as soon as I booted up into windows, one of my fans has started going like a banshee at top speed. I'm assuming it's the one connected to the Antec CPU radiator, since that's the only one hooked directly into the motherboard. It's really loud and annoying at full speed. Wondering if there's something I can do to fix this? Or should I just grab a fan-to-molex connector instead?

Also, during Prime95, the multiplier drops from 17 to 8 randomly. The temps never get above 50c, but could it be that something is actively throttling to prevent heat issues?
Edited by ashbeowulf - 6/18/11 at 5:52am
    
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post #12 of 40
See if there's an updated BIOS on the ASUS site. It may be various issues coming into play that could be solved with one BIOS update.
post #13 of 40
I wouldn't worry too much about running Prime or any other stress-testing program for more than a few minutes with that board,especially if you are only using the CPU multiplier.Play a game or 3D benchmark,if it is not stable you will know it.Sounds like your CPU is throttling back in Prime.What are your ambient temps and CPU core temps,and what voltage are you using?
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post #14 of 40
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Seems to happen when it approaches 50 deg celsius. Vcore voltage is 1.504

Just checked for BIOS updates on the site, says "support for new cpus" but it says my cpu has been supported since awhile ago. Should I update anyway? The release bios is only 2 months old.
Edited by ashbeowulf - 6/18/11 at 11:08am
    
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post #15 of 40
Quote:
Also, during Prime95, the multiplier drops from 17 to 8 randomly. The temps never get above 50c, but could it be that something is actively throttling to prevent heat issues?
This would be the throttling due to VRM overheating I was telling you about; you're running a CPU with 125W TDP to begin with, overclocked, with 1.5V, no VRM cooling, 4+1 phase; definitely expect this to happen. Which is why you need those heatsinks for the VRMs for everything to work properly!
post #16 of 40
Thread Starter 
so until those heatsinks arrive, am I better off running no overclock at all? Because when it throttles it goes down to 1600mhz which is really counterproductive. I rearranged two of the fans so that two of them will intake air directly over the top of the vrms and the giant 280mm fan on the top of the case exhausts, along with the 2 HDD exhaust fans. Now if only dhl wasn't the worst...

Also, that fan noise I heard was actually the really loud optical drive my friend gave me lol. I needed a sata dvd-rdl capable drive for free so I guess I cant complain! I really can't wait to get this vrm situation fixed so I can run these nice high clock speeds stably
    
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post #17 of 40
Well what would you rather have?
Multiplier at a constant x15-16 or whatever all the way through, or x17 with periodic/constant drops to x8 that actually even more significantly impact performance?
Something to think about perhaps. You can overclock without blowing this motherboard up (unless you do something ridiculous i.e. 1.65V), but it may not work properly because the VRMs are putting off too much heat (that isn't being moved) to be safe for running certain processors at certain speeds/voltages, rendering them inadequate.
post #18 of 40
Thread Starter 
Okay, even running the processor at stock speeds during prime95, it cuts the voltage and multiplier at 48 degrees...Could this really all be caused by the vrms being too hot? I don't see how a brand new board with AM3+ capabilities wouldn't be equipped for stock load voltages from a hexcore Is the board just a p.o.s.?

Also, thanks to Sandman for all the help he's given me!
    
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post #19 of 40
VRM heat goes up with CPU heat; some motherboards may have it detectable via HWMonitor, others don't. VRM cooling is very likely to fix this though. This board's VRMs are likely capable of running a 1090T just fine however on the stock cooler; your cooler does not provide much VRM cooling if at all and this is a significant detriment to the operation. The only other way that voltage & multi could be downclocking is with Cool'n'Quiet, however that should never be happening during Prime95 tests & load. You can even leave it on for overclocking (doesn't affect my OC) but it only activates while idle.
post #20 of 40
Thread Starter 
Thanks for the help. I ordered this: http://www.newegg.com/Product/Produc...82E16835608018 today. Hopefully that, in conjunction with the vrm heatsinks, should fix the problem. Until then, I think I'll replace this heatsink with the stock one, no matter how noisy it's said to be. If it keeps the vrms cool and running right, it should at least give me enough wiggle room to get my feet wet at properly doing a mild overclock and stress testing without total meltdown.

Edit: Well, you were right! The vrms are definitely much better now. Running stock heatsink on top of it. Temps show 55 steady while running prime95. Idle temp is about 7 degrees higher as well, but what good is a cold cpu if the vrms are overheating every 10 seconds? Thanks for your help!
Also, what would you recommend as a shutdown temperature to prevent damage to this cpu? I've heard varying numbers.
Edited by ashbeowulf - 6/19/11 at 7:09am
    
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