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24/7 Max Safe Voltage for AMD Thuban 1090T?

post #1 of 22
Thread Starter 
Hi Guys,

I have a quick and specific question, If anyone would know what the 24/7 Max Safe Voltage for the AMD Thuban 1090T? info and experiences would be greatly appreciated
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InspiratioN
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post #2 of 22
Unless you're on water, you probably can't reach the max voltages before you'll be thermally limited, but generally 1.55volts is considered the max, while many others will prefer 1.5volts.

No matter what anyone claims, these are guesses. Unless the engineers who designed the chip are willing to make a claim for us, we're left to anecdotal research.

I point that out because you're asking for 24/7 (365) safety. If you're overclocking, there is no well engineered claim to that other than stock.

Thuban is new, so we have little data to go on, but it IS the same 45nm process, with a few tweak, that we've seen in previous chips from a couple of years ago, and I don't know of any reports of constant 1.5volts that lead to chip failure, which is about as specific as we can get.

Every usage of the CPU changes it a little, and the more heat, voltage and speed is applied, the faster the effect. It will take years to make the effect significant, but there are several reports of CPU's which once reached, say, 3.8 Ghz, which can't manage that top speed after about 2 years...reductions of about 10% have been observed.
post #3 of 22
Hi sycmick, just noticed that you have the same cpu and motherboard as me. I only recently purchased mine and was wondering that before you overclocked yours, did your cpu speed jump down from 3.2GH/z to 802MH/z at all?
post #4 of 22
You can usually run a Deneb chip at 1.5v 24/7, but the Thuban's require lower voltages than Deneb's. I would assume that means you are able to achieve higher overclocks, but I don't know for certain whether it handles the voltage the same way.
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post #5 of 22
Quote:
Originally Posted by waseem2k View Post
Hi sycmick, just noticed that you have the same cpu and motherboard as me. I only recently purchased mine and was wondering that before you overclocked yours, did your cpu speed jump down from 3.2GH/z to 802MH/z at all?
Turn off the Cool'n'Quiet option in the Bios. It should be under CPU Configuration.
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post #6 of 22
I was curious about this too. I'm running the x6 1090T on air at 3.9Ghz, 1.41V and its stable. Idles at delta +4C (= 30C), and under prime95 blend test it gets up to 48C. It seems there's still a lot of headroom. Should I go higher? I'll have the chip for 4 years (as that's when I finish my professional degree).
post #7 of 22
I own a Thuban (960T) and have heard from many sources that 1.475 vCore is getting into the danger zone for a Thuban... everyone seems to think the Deneb and the Thuban are like, the same chip - but they have many differences/improvement in the Thuban and therefore different voltage needs.

I'm running 4.15GHz at 1.425 volts and the NB is at 3100 with the CPU-NB at 1.325 volts - If you're aiming for 4Ghz or even a bit over, you shouldn't need anywhere near 1.475vCore - let alone the 1.5 to 1.55 that others have mentioned above.

The quote below is from the link below.
http://www.overclock.net/t/777378/official-gappos-little-deneb-thuban-overclocking-guide-with-too-many-smileys

"CPU VOLTAGES

We've a tried and tested limit of 1.55vcore for Deneb based phenom II's and Athlon II's. It's a safe limit and you don't see much scaling past that so this is you

Thubans are a different story. We've heard from reliable sources that past 1.475 is the danger zone. Much past that and heat is going to become an issue anyway. If your on a Thuban on ambient then this is you."
post #8 of 22
If cooled enough, 1.55V is cool.

Keep it under 55ºC though or it'll be unstable as hell.

Although if you want it to live long and prosper (more than 8 years) don't cross 1.5V on a daily basis.
   
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post #9 of 22
Quote:
Originally Posted by Artikbot View Post

If cooled enough, 1.55V is cool.
Keep it under 55ºC though or it'll be unstable as hell.
Although if you want it to live long and prosper (more than 8 years) don't cross 1.5V on a daily basis.

I doubt he'll keep that processor under 55C on air at 1.5V but aside from that - are you implying that "El Gappo's" guide and his "reliable sources" are misleading all of us Thuban owners for their own twisted pleasures?

Just saying... 1.475V is the recommended max especially on air. I've seen them run fine with more voltage and excellent cooling, yes -but for how long?
post #10 of 22
I wouldn't go anywhere past 1.475-1.5 for 24/7 use, keep the core temps below 60C and you should be fine
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