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1090T OC Issues

post #1 of 16
Thread Starter 
Hello,

First off, my relevant system specs:
Motherboard: Asus Crosshair IV Formula
CPU: AMD 1090T BE
RAM: OCZ 4gig DDR3 667MHz x4
Cooling: Air; ChillTek ULTRA heatsink


I've had my 1090T for a while now, and I've on and off been playing with my OC settings. In the past, I've had it stable at 4.0GHz, but I could never get it higher than that. Recently, it's been having issues. I can no longer get it to be stable at 4.0GHz no matter how high I put the voltage, (I'm on air cooling, and I can't really put it passed 4.5 before I get in the 80c range with prime95), but I'm at 3.9 @ 1.3625 and it ran prime95 for 12 hours flawlessly.

Settings:

Multiplier: x16
CPU Frequency: 244
DRAM frequency: 966MHz (though CPUz says it's at around 480, so)

CPU core voltage: 1.3625
DRAM voltage: 2.1
NB voltage: 1.55
SB voltage: 1.3


Essentially, prime96 gives me the "FATAL ERROR: rounding was 0.5, expected less than 0.4" error, and it is most definitely probably due to my CPU voltage as I ran the non-memory intensive test and still got the error. When I try an OC with these settings:

Multiplier: x16
CPU Frequency: 250
DRAM frequency: 1000MHz

CPU core voltage: 1.5
DRAM voltage: 2.1
NB voltage: 1.55
SB voltage: 1.3

Not only do temperatures reach pretty dangerously high levels, but I get the rounding error on multiple CPU cores. I don't BSOD, though.

So what's the deal, do I have a bad chip? Or am I overlooking something? Input will be very much valued and appreciated, thank you for your time!

--DBentt
post #2 of 16
Are you saying 80c on the cpu socket temps? (That's crazy high) That's the most likely cause right there! CPU socket temp above 55c is known to cause instability by itself.
You could read through this thread for more info http://www.overclock.net/amd-cpus/93...out-1090t.html and make the call for your self. For myself I always keep my cpu socket temp under 55c. My current OC listed in sig rig passes 24 hrs of prime95.
 
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post #3 of 16
Thread Starter 
Core temperatures. I'm still fairly new to overclocking so I don't know if that's the same as CPU socket temperatures, nor do I know how to check those if they are not. :<
post #4 of 16
Just noticed your NB and SB voltages look high as well, here's a snip of what mine runs at while running 4139MHz.

If your temps are that high you definitely need better cooling.

Use PC Probe II (Asus) and check cpu socket temps as the rule for 6 cores. HWMonitor also works nice on the CHIV's.

Edited by The Sandman - 2/26/11 at 3:20pm
 
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post #5 of 16
Thread Starter 
I idle at around 24-32 depending on ambient temperature, the ~80c is during prime95 load only when I have the voltage at 1.45 trying to get a stable 4.0GHz. Right now at 3.9 and my current voltage, i don't go above 65.
post #6 of 16
Your RAM is running @ 2.1V ???

Why do you run NB and SB at that voltages? Keep them AUTO
CPU Volt is high too.
I'm priming 4GHz(249 x 16) right now(for a client), and 1.3875V(set in BIOS) seems enough
CPU/NB @ 3000 needs 1.3125V(set BIOS)

EDIT: check your RAM sticker for timings and voltage
Edited by IOSEFINI - 2/26/11 at 3:24pm
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post #7 of 16
Thread Starter 
I reset my NB and SB to auto as advised and put in the voltages and frequencies that you noted (as a base, I know that I'll have to tinker with it unless I get super lucky and my CPU is the exact same as the one you're working on). I'll check my RAM sticker when in a little bit. Current timings are BIOS default at 8 8 8 24. Lowered DRAM voltage to 1.5, will lower it more if there are no errors.
post #8 of 16
You may want to read through this thread
http://www.overclock.net/amd-general...ing-guide.html
It'll give some real good info plus give you a path to follow if your not sure of how to OC.
Feel free to PM me if I can help you any more.
 
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post #9 of 16
You generally want to stay under 62C and under 1.55v.
80C is retarded.

Your heatsink likely isn't mounted correctly (TIM, etc) or it's absolutely horrendous.
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post #10 of 16
Thread Starter 




Current settings, the RAM timings and whatnot are based on the sticker:

PC3 10666 9-9-9 @ 1.65v 1333
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