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[Explanation] So what is VRM, and VRam - Page 2

post #11 of 18
this needs to be bumped. Gj +rep
    
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post #12 of 18
Quote:
Originally Posted by Defoler View Post
Same as the 580, 6.
The 470 has 4 like the 570, but they are of different make, and imo ended up better than the 570's ones.
that's exactly what gives on 570 (quality of VRM's) 4 should be (and it is in many cases) sufficient just like on 470 and as for 590 "it won't match the strength of the 580" it's not about the strength but how close they are spaced from each other (heat is what kills)
http://www.ozone3d.net/public/jegx/2...aging_load.jpg
thanks for this thread
Edited by coolhandluke41 - 4/22/11 at 10:40am
    
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post #13 of 18
Quote:
Originally Posted by BallaTheFeared View Post
Yeah I know, I was trying unsuccessfully to be funny.

SAMPer?
You succedeed with me if it is of any consolation.

Very interesting read Defoler.
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post #14 of 18
Thread Starter 
Quote:
Originally Posted by coolhandluke41 View Post
that's exactly what gives on 570 (quality of VRM's) 4 should be (and it is in many cases) sufficient just like on 470 and as for 590 "it won't match the strength of the 580" it's not about the strength but how close they are spaced from each other (heat is what kills)
http://www.ozone3d.net/public/jegx/2...aging_load.jpg
thanks for this thread
How much closer next to one another doesn't mean much.

The VRMs in the 590 have more space and are cooled better than the 580 or 570 ones, as they have the fan right on top of them, while the single GPU ones they have a plastic ugly heat-sink like on them, which doesn't do very well.

And heat isn't much of an issue, but the quality and how they handle the volt going into them.
This is why nvidia have pretty much locked the 590 into low volts, to protect it, as the 5 VRMs pushing the required volts for the 580 core, isn't enough (and same reason why so many 570s died, even under water or with very mild OCs).
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post #15 of 18
Quote:
Originally Posted by Defoler View Post
How much closer next to one another doesn't mean much.

The VRMs in the 590 have more space and are cooled better than the 580 or 570 ones, as they have the fan right on top of them, while the single GPU ones they have a plastic ugly heat-sink like on them, which doesn't do very well.

And heat isn't much of an issue, but the quality and how they handle the volt going into them.
This is why nvidia have pretty much locked the 590 into low volts, to protect it, as the 5 VRMs pushing the required volts for the 580 core, isn't enough (and same reason why so many 570s died, even under water or with very mild OCs).
in case you missed it;
http://www.kitguru.net/components/gr...-590-problems/
the heat and cheap S vrms/mosfets are always an issue if 4 VRMs (570) is not enough they all will be dropping like flies and they are not.
Explain this..why one 570 can take 1.2v for months and the other one kicks the bucket at stock?

Take a badly welded frame on a bike for example (resent history ),some implemented ticker beefier frame and some improved the quality of the weld..they both succeeded and they still will brake on some occasions ,why.. because the bike wasn't intend it for 400 pound gorilla and 40 foot cliff jumping
Edited by coolhandluke41 - 4/23/11 at 8:23am
    
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post #16 of 18
Whats the general opinion on the MSI Lightning 480 that has 16 phases (12 GPU, 2 memory, 1 PLL)?
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post #17 of 18
MSI is crazy :/
Too many phases , but where can one go wrong with one of those cards ??
Memory usually has ONE phase , nice to see that they have 2 .
PLL always has one ?
12 GPU is INSANE ! !
VRMs also depend upon the chokes used , AFAIK VRM's are a combination of inductor/capacitor/choke and Mosfet-- something like that *cough*? - this combination makes ONE PHASE!!

More phases are like more workers -- working on the same total workload, lower load/ worker..

12 GPU phases is theoretically a LOT more power that can be delivered to the GPU core without mosfet burn out !
Also , from their site :
"Military Class ll Component
- Hi-C CAP for GPU provides more precise voltage.
- SFC (Super Ferrite Choke) has higher current for better overclocking ability.
- All Solid CAPs have longer lifespan."

Speaks for itself.
GG

Oh and I;ve got 6+2 on mine.
post #18 of 18
Quote:
Originally Posted by Defoler View Post

Nothing personal, but its a bit irritating at times

To this means, that in order to deliver the max 1.2V per GPU, the 580 has the least work done needed per VRM. It has 6, they are strong, buffy, and can take up almost everything.

On the other hand, the 570 only has 4. So they have to work harder, stressed out, and in the end, one of them will cave over the weight of work, say "**** that, I'm out of here!", and blow itself up, taking the whole card with it.
LuLz
LOL @ f that im outtahere
in hindsight , thats exactly what happened w/ my 250gts :@
That fool of a card just decided one day - enough is enough -red , blue , white, red , blue , red ,red ,red ,red , windows bsod! and GG , no more boot! ! and thats 2 months into running it @ OCCT shader (8) stressing AND it had 2 power connectors ! ! wonder how it packed up running solitaire
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