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worth changing Opteron 146 to 3800?

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now with my pc,, my temps r not too great cos I must have been using a eailier version of prime95 that only does the 1core. Downloaded a new version of prime95 that tortures both cores, and the temps shoots up from 40 to 50 streight away, then steadly gets to 72c on the 1 core and fails. i put the cpu down to 2.78, but it still gets as hot in prime95and the core fails???
 
I'm also not an SoAM2 person, hardly know anything about them. I would still venture a guess at a dodgy DTS in that ~14C CPU though.

Speedy, 60C really is the max you wanna be getting to. You could easily damage the chip at 65C+*. Drop the chip back to stock and see how temps are then. What voltage you using for the 2.78Ghz?

Jon

*On the other hand, I've known some Athlons get to ~80C and be quite happy. In my books, however, it's not worth the risk.
 
I never touch the cpu voltage, it stays on normal. Ive just put it back to stock speeds,, but it still jumps from 38-40c to 50c as soon as i run prime 95, then 1 core slowly works its way to 60 and the other 70.

Tomorrow I think I will reseat the heatsink. How do you apply the AS5, cos Ive never needed to apply AS5 to any of my cpus ive owned?. MY fx55 clawhammer were 54c full load with the paste that came already on the heatsink.
 
Also have I got my "HT Frequency ratio" set right,, its on 4x at the moment?

it should be set to be below 1000mhz ie FSB x HT ratio = 1000mhz or less.

eg FSB set at 250mhz, HT set to x4 = 250x4=1000mhz.
or FSB 300, HT set to x3 = 300x3 = 900mhz.

voltage wise set it yourself before overclocking to whatever the CPU is supposed to be. sometimes some motherboards bump the Vcore right up as soon as you move the FSB and this will effect temps.
 
Yeh, that's still a bit too high. The single cores run a lot cooler than the duals!

I apply the AS5 by putting a grain of rice sized blob in the middle of the IHS and then letting the pressure of the heatsink spread it out.

What helpimcrap said is right, the multiplier should be set so HTT multi x FSB <= 1000mhz. Having the HTT 200-300mhz under 1000mhz will hardly create any performance hit at all. It definitely won't be noticeable. On the other hand, having it even 10mhz above 1000mhz can cause instability.

If you're using stock voltage, manually set the BIOS to stock voltage. Don't leave it on auto. It fluctuates too much and can provide too much Vcore for the clock speed the chip is running at. Could be the cause of the high temps ;)

Jon
 
I never touch the cpu voltage, it stays on normal. Ive just put it back to stock speeds,, but it still jumps from 38-40c to 50c as soon as i run prime 95, then 1 core slowly works its way to 60 and the other 70.

Tomorrow I think I will reseat the heatsink. How do you apply the AS5, cos Ive never needed to apply AS5 to any of my cpus ive owned?. MY fx55 clawhammer were 54c full load with the paste that came already on the heatsink.
It can't hurt to try a reseat, especially as the ceramique you used is pretty ancient! It could be that IHS has poor contact with the core though :(
 
Yeh a reseat might be a good idea. I think Core 0 has bad contact with the IHS, as it seems to be consistently about 10C higher than Core 1. Not much you can do about that really, apart from take the IHS off.

Voltages look OK, Vcore is fine. Just a thought: 5V looks a bit dodgy. The maximum "error margin" is around 5%, and 3.36v for the 5v rail is way outside that. That's not causing the high temps though.

Jon
 
Ive resat the heatsink twice, and no diff at all on both attempts. Theres not much more I can do accept leave it for a few days, and see if the the temps drop, If they dont I will buy a better heatsink and fan I guess?
 
Voltages look OK, Vcore is fine. Just a thought: 5V looks a bit dodgy. The maximum "error margin" is around 5%, and 3.36v for the 5v rail is way outside that. That's not causing the high temps though.

Jon

Could that be the reason why when theres no power going though the board the bios resets its self to default settings? I thought it was the battery but the clock stays right.
 
Yep, a new HSF might be in order. What are you using at the moment?

Voltages that are a bit odd often point generally to PSU problems, so yes that could be the reason. It can also cause all sorts of weird problems throughout the entire system, so if anything happens like random shutoffs or restarts, suspect the PSU.

What PSU is it?

Jon
 
Im using the stock heatsink that came with the opty with the heatpipes,, my psu is a "enermax noisetaker 600watt" its comming up to 3yrs old at xmas
 
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