OCCT 3.1.0 shows HD4870/4890 design flaw - they can't handle the new GPU test !

[largon]

Does anyone know how many phases the visiontek 512MB 4870 has? (...)

You can tell by look at the backside of the card. If the marked caps are missing it's 3 phase, if they are there it's 4 phase.

Sooo... the Nvidia cards perform worse than the AMD/ATi cards?

Yep.
A downclocked HD4890 (850/850) keeps >80FPS constant:

(OCCT doesn't support temps monitoring on HD4800s so the second line is 5V)

[Sparky]

You can tell by look at the backside of the card. If the marked caps are missing it's 3 phase, if they are there it's 4 phase.

Thanks. Mine is 3 phase.

So this begs the question, why does my reference 4870 have no problem, while others do

[Nightstar]

Thanks. Mine is 3 phase.

So this begs the question, why does my reference 4870 have no problem, while others do

Good question Sparky. If I might venture a guess it would be that your 512MB
Reference card doesn't draw as much current as the 1024MB cards. Furthermore If I'm not mistaken you're excellent cooling(water?) reduces the current draw of your card.

[Sparky]

Good question Sparky. If I might venture a guess it would be that your 512MB
Reference card doesn't draw as much current as the 1024MB cards. Furthermore If I'm not mistaken you're excellent cooling(water?) reduces the current draw of your card.

Doubt the cooling matters much, because the vregs on mine are air cooled and typically get almost just as hot as an air-cooled card. Plus, Tetedeiench says temp shouldn't matter.

I suppose the 512MB vs 1024MB could be a difference but is really drawing that much more power for the memory?
I've gotten lost in the mess of useless flame posts - Have there been any 3 phase 1024MB cards that had no issue, or any 512MB 3 phase cards that did?