Q9550 - Throttling Problems

[Makhaira]

Afternoon OcUK.

So, I've stuck a happy 380FSB onto my Q9550, giving me a nice boost from 333. My problem is that I can't seem to maintain the multiplier in Windows when under load.

If I'm priming, or running a game bench, most of the time it's happily at 3.2Gig (380x8.5). It looks like the chip is thermal throttling at 65C though, all the way back to 2.2Gig.

My question is - is this a problem, or is this the thermal threshold on these chips? I thought Tjmax was 71.4C, so I'm surprised at this. If it is definitely thermal though, then I'll just get some better cooling and have another go.

Other bits of info - Asus P5QPL-VM EPU board, with a G41 chipset. Running Windows 7 64bit. Monitoring via Coretemp and CPU-Z.

Cheers guys.

 

[Makhaira]

Right, definitely seems to be a throttling issue, time to part with some pennies today and get a Megahalems methinks.

 

[Greebo]

Its EIST or whatever it's called. Your cpu only runs at full speed (multi) when needed. Switch it off in bios if you want.

My q9650 used to go past 70C no problem even when running at 4.85Ghz.

Of course, one core would always crash when it hit 72C.

In fact, I am sure that its around 90C max temp for the 9550.

 

[Makhaira]

I'm happy with that, but my point is that it's dropping back even when Prime95 is running! I'd like to keep the auto-throttling in place for when I'm just using my machine as a desktop workhorse.