AMD 1055T throttling under watercooling?

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thilanliyan

Lifer
Jun 21, 2005
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I have an AMD 1055T with Asus M5A97 EVO m/b and at 3.8GHz and 1.47v it seems to be throttling when running Prime95 once the ASUS software reads 60+C. Coretemp reads much lower (in the 40s).

Which temp is correct? I was not getting any throttling previously with my Gigabyte DS4H AM2+ board.

Cooling is a DTEK Fuzion with a 240mm + 120mm rad.
 
BD231

BD231

Lifer
Feb 26, 2001
10,568
138
106
o_O ..... throttling as in Turbo throttling or the chip is downclockig/undevolting?

My first bet would be voltage. It can be so different from one mobo maufacture to another it's hard to tell if 1.47v is the actual voltage or the load voltage. If it's actual then that means your chip is pushing your volts up far beyond 1.5v every time you u go into full load since the x6 has a built in voltage adjustment for heavy load. Short of a horrendus heatsink install or a specific motherboard feature there should be very little that can make that chip throttle. I'd definitely drop your voltage and see what happens.

For 3.8ghz I have to set my board between 1.325v and 1.350v. From there, when I hit full load, I use an app like CPU-Z to guage what the load voltage is, which is 1.460 to 1.475 or so. If your board behaves the same way your voltage is likely just way to high. If not, you might have just forgotten to disable Turbo.
 
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thilanliyan

Lifer
Jun 21, 2005
12,065
2,278
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Throttling is occurring by the multiplier being lowered and only happens when the CPU temp goes above 60C in the Asus software. Once the temp goes down to about 45C the multiplier goes back up. Turbo is disabled.

My CPUz is reading 1.464v at load and it stays like that.

Are you saying that if I set 1.47v in BIOS, then at load the voltage is actually higher than that? And CPUz would not be reading it correctly?
 
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BD231

BD231

Lifer
Feb 26, 2001
10,568
138
106
I'm gonna do my very best to be nice, which isn't like me at all. CPU-Z is just a tool that'll help you find out *whether or not* your board is reporting the correct voltage. Water cooling on a thuban is pointless to begin with, I never go anywhere over 40c on a cheap air solution so either there's something wrong with the cooling arrangement (bad heatplate seating, ect.) or its getting way to much juice.
 
richierich1212

richierich1212

Platinum Member
Jul 5, 2002
2,741
360
126
BD231 is right. 60deg is way too high for a Thuban under water cooling. Have you tried lower vcore? From the X6s that I've messed with 4GHz only needed 1.38v to 1.425v with Scythe Mugen 2 or Corsair A70, and my temps never went over 52deg for me.
 
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thilanliyan

Lifer
Jun 21, 2005
12,065
2,278
126
Well there was definitely proper contact. maybe the cooler master TIM I was using is crap. This CPU needed 1.525v to reach 4ghz even with the gigabyte board.

I only really followed coretemp with the gigabyte board cause there was no software. I was looking at the Asus reported temps cause I was using it anyway. I just wasn't sure which temps are correct. Coretemp was reading in the 40s.

Anyway, I ended up selling the CPU.
 
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Kantastic

Kantastic

Platinum Member
Sep 23, 2009
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Could be your VRMs overheating since you don't exactly have airflow over the socket with a waterblock.
 
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thilanliyan

Lifer
Jun 21, 2005
12,065
2,278
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Dunno what to tell you guys. This chip was only prime95 stable at those voltages. It was one of the very early batches since I bought it around launch..maybe that's why.

And in not an expert overclocker...maybe I was doing something wrong.
 
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SlowSpyder

Lifer
Jan 12, 2005
17,305
1,002
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thilanliyan said:
Dunno what to tell you guys. This chip was only prime95 stable at those voltages. It was one of the very early batches since I bought it around launch..maybe that's why.

And in not an expert overclocker...maybe I was doing something wrong.
Click to expand...


I had a 940 that would only do 3.6ghz with 1.5v (though I'm not sure how completely comparable the early x4's are to early x6's). Now my x6 happily does over 4GHz with 1.45v. Luck of the draw when it comes to overclocking, I guess.
 
richierich1212

richierich1212

Platinum Member
Jul 5, 2002
2,741
360
126
I had one of the early batch 1055Ts. It was as good as a 840T (that unlocked to X6) that I acquired over a year later. A 2nd 1055T that I got for my brother a few months after my 1st 1055T needed more voltage to reach the same clocks. Yup, all in the luck of the draw.

Maybe because that board is AM3+ and designed for BD it needed to have increased voltage or something.
 
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