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post #491 of 1597
Quote:
Originally Posted by Tator Tot View Post
They're cautioning the usage of low voltage because of the transitor & phase count.

Though generally low voltage would be below 1.4v, I've tested the board up to 1.5v on an x6. And it was fine.
Do note that I had an Antec Spot Cool on low, blowing onto the VRM area.

The x6, I imagine pulls, 115-120 watts (max 125). The 555 x2 overclocked is significantly less watts. So is it the volts or the watts that is problem?

Also this:





I use the 555's original heatsink fan as additional cooling for the vrm. And then threw on an old junked heatsink fan on to the northbridge...




Actually, I made a thread about it too.

I suppose that the 555 stock hsf is similar (maybe a bit better) to the Antec Spot Cool's performance. Hopefully it helps,


Jyk
Edited by jyk - 6/4/11 at 11:40am
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post #492 of 1597
Thread Starter 
Quote:
Originally Posted by jyk View Post
Tator Tot, you reminded me:

The front page makes it a point to say: 125W+, OC w/caution (use low volts): what does "low volts" mean?

I have the ASRock 870 extreme3 motherboard. I know you mentioned you had history testing ASRock motherboards. How much can they take - I got 555 BE that I've ran up to 3.8ghz, @ 1.464v. I've tried for 3.9ghz, but was still unstable @ 1.488v. How much voltage head room is there? I've been afraid to go further, do to the warning on the front page. But as it doesn't give a specific number, I don't know if I'm under, at, or above the borderline.

Cheers,

Jyk
It is a pretty high quality board, but there is only so much you can do with 4 phases. Hence the caution. If you want to prove us wrong, great, we welcome it. As the OP says, those "ratings" are mostly subjective, as we do not have the capital to actually test most of these boards.
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post #493 of 1597
@jyk, that's a solid solution for keeping the VRM's cool.

A x6 can draw up to 200w.

Voltage does not have a great effect on power draw. But frequency does, as frequency increases can dramatically increase the amperage draw, which then increases the power draw substantially.

Still though, a 555BE won't push that boards VRMs.
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post #494 of 1597
TDP usually takes into account heat more than power consumption, but it is mostly a reference value for cooling solutions. The Phenom II stock cooler will be able to handle 125-140W processors at stock speed, but anything less might not do it. Anything more would be redundant, allowing you to push the processor past the normal TDP value, which also brings up the power consumption by a fair bit.

A 555 BE will not push the VRMs that hard if it is remained locked to 2 cores.
post #495 of 1597
Quote:
Originally Posted by Tator Tot View Post
@jyk, that's a solid solution for keeping the VRM's cool.
Thanks! That's big complement to a $3 solution
(Junked fans, a BBQ grilling rack, old window blinds parts, and a cut-up bath mat)
Quote:
Originally Posted by Tator Tot View Post
A x6 can draw up to 200w.

Voltage does not have a great effect on power draw. But frequency does, as frequency increases can dramatically increase the amperage draw, which then increases the power draw substantially. Still though, a 555BE won't push that boards VRMs.
Quote:
Originally Posted by xd_1771
A 555 BE will not push the VRMs that hard if it is remained locked to 2 cores.
That's a relief.

Quote:
Originally Posted by reflex99
If you want to prove us wrong, great, we welcome it. As the OP says, those "ratings" are mostly subjective, as we do not have the capital to actually test most of these boards.
I guess I'll try a bit more voltage to see if I can get to a stable 3.9 or 4.0 and report back if successful... Btw: can you add, for reference/definition of terms, the bit Tator Tot said to the OP, about OC w/caution (use low volts) means: suggesting users to use less than 1.40v for vcore. ?


thanks again,
Jyk.
Edited by jyk - 6/4/11 at 2:06pm
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post #496 of 1597
Yeah, basically it means don't push the vCore higher/to the extreme i.e. passing 1.5V
Most MSI 790FX-GD70 that did die with the Phenom II x4, did so at above 1.5V

1.4V should be okay
post #497 of 1597
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
Yeah, basically it means don't push the vCore higher/to the extreme i.e. passing 1.5V
Most MSI 790FX-GD70 that did die with the Phenom II x4, did so at above 1.5V

1.4V should be okay
Did you find more?

The last i checked you only had one.
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post #498 of 1597
Quote:
Originally Posted by xd_1771 View Post
Yeah, basically it means don't push the vCore higher/to the extreme i.e. passing 1.5V
Most MSI 790FX-GD70 that did die with the Phenom II x4, did so at above 1.5V

1.4V should be okay
Unfortunately, I guess I got a runty 555 BE CPU that take a lot to get stable. The motherboard auto-vcore sets at 1.43v - When I put it on manual, the lowest I can run stable is 1.37v, with LLC on, which bumps the voltage to 1.404v at idle and 1.416 on load.

BTW: I tried ocing to 3.9ghz @ 1.4625v in the BIOS w/ LLC on, vcore idles at 1.486v, Prime95 load 1.504v - froze after 1 hour of Prime95... on the flip, at least my MOSFET heatsink was still relatively cool.

I've had the processor 4 months, would have been nice to figure this out sooner, then I would have exchanged it...


Jyk
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post #499 of 1597
Well I have seen discussion about MSI 790FX boards taking the blow if you push more than 1.5V before, but I haven't actually seen examples... I am looking for them
post #500 of 1597
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
Well I have seen discussion about MSI 790FX boards taking the blow if you push more than 1.5V before, but I haven't actually seen examples... I am looking for them
I really don't think they are a problem with X4's

I think i might see if i can convince Alex to let me borrow a sample to test some X4's with, and see if i can kill it
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