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[Lab501] GTX590 VRMs analyzed - Page 6

post #51 of 207
Nvidia I am disappoint. Seems like they've really taken their eye of the ball with the 5xx series while AMD put the required effort into their new lineup.

Oh and as usual Phaedrus thanks for another good article and link!
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post #52 of 207
Quote:
Originally Posted by Phaedrus2129 View Post
Except they're failing at stock.
There are always cards that fail at stock. That's why they come with warranty. I'm sure the percentage has to be extremely low for companies like POV to release a GTX 590 clocked at 690Mhz and thinking of releasing a water cooled version at higher speeds
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post #53 of 207
Thread Starter 
Quote:
Originally Posted by saulin View Post
There are always cards that fail at stock. That's why they come with warranty. I'm sure the percentage has to be extremely low for companies like POV to release a GTX 590 clocked at 690Mhz and thinking of releasing a water cooled version at higher speeds
Usually random DoAs are due to cold solder joints, loose components, ESD, or shipping damage.

GTX590s are experiencing explosive mosfet failure even at stock clocks (though not nearly as often as when they are overclocked). That's a failure mode that only occurs when A.) the mosfet has too high a forward current, or B.) the mosfet itself is faulty. We're hearing about a lot more stock failures than would be expected for the typical mosfet DOA rates for companies like Infineon, so that means that the fets are so close to the edge of their current capacity that even the normal tolerances in capacity can put them in a state of jeopardy.
post #54 of 207
Unfortunately, things like the GTX590 happen when the suits make the engineering decisions. I think originally the engineers wanted to go toe-to-toe with the HD6990 and beat it - they very obviously knew (like the rest of us) that such cards are aimed at the high end, and that very naturally means overclockers. If anyone can point me at an extreme PC gamer who doesn't overclock, please do so.

However, the suits decided that they wanted a "user friendly" dual-GPU solution, i.e. a quiet one - unfortunately, they didn't realise that the target market doesn't care, and if there's a problem with noise, they will rebuild their rigs to suit; i.e watercooling. It's also very likely that they wanted to price-match the HD6990 and make a profit and not hurt GTX580 SLI sales, which are worth an extra $300 per purchase.

Add these decisions together, and you get the GTX590. The max CUDA cores, full bus-width GF110 was the chip to use, since they could run it at lower clocks, get the same performance as GTX570 SLI and use less power, which in turn means they could use a cheaper power delivery system.

Basically, the GTX590 looks like a botch, trying to cover two markets. The sensible option would have been to take a hit on the profit margin and either use higher-current VRMs or use the same ones in a n+1 configuration per GPU, where n is greater than 4. Would 5+1 be possible, or does n have to be an even number?
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post #55 of 207
i really find it hard to believe that "some" people find a card blowing up from overclocking as normal......what normaly happens when a card's oc is unstable?.....3d app fails.....pc freezes requiring hard reboot......ok.....these are the things "most" people find "normal"......no harm done......just restart......now when a card goes up in smoke, and obviously a "few" have done so, how does one think that that is ok? it's normal......"well....you shoudn't have overclocked it" is the first defence
    
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post #56 of 207
Quote:
Originally Posted by Blameless View Post
More performance is always more useful.

Also, several cards have failed very near stock settings in only weeks. This does not bode well for long term use.
they have failed at stock speeds?!!?

sweet mother
thought it was only when overclocked!
    
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post #57 of 207
I must say that Im surprised at this. Nvidia is not normally one to skimp on things like this...
post #58 of 207
Cleaned.

Everytime I see an Nvidia thread I shudder. Saulin bro, stop defending Nvidia as if it is a family member. The fact is Nvidia like other companies have the ability to mess up and they have with the GTX590. Poor testing was put in place for this card clearly. Just look around at the issues, even at stock. I think its time to accept that Nvidia shot themselves in the foot.
post #59 of 207
Quote:
Originally Posted by ENTERPRISE View Post
Cleaned.

Everytime I see an Nvidia thread I shudder. Saulin bro, stop defending Nvidia as if it is a family member. The fact is Nvidia like other companies have the ability to mess up and they have with the GTX590. Poor testing was put in place for this card clearly. Just look around at the issues, even at stock. I think its time to accept that Nvidia shot themselves in the foot.
I'm not bashing AMD or really defending Nvidia but actually trying to prove that people really had way too high expections out of this card. Just like they did with GTX 480. I'm keeping it civil man. Just giving my 2 cents

I'm not the one that throws the first rock but I do like to defend my points. To me the 6990 launch wasn't a big deal and really the GTX 590 launch is not any better but not much worse. People will always try to hype anything, like the cards blowing up at stock clocks and yet there really isn't concrete proof that this is happening.

There is proof that overclock is not as good as many including me expected though because the card throttles.
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post #60 of 207
you know i like nvidia more than ati and i think they failed terribly with their VRM. Maybe they thought since they donwed teh TDP(which is cloaked and not a real good TDP its way too low) they can remove phases. What i don't understand is how you guys compare aftermarket MSI GPUs to a stock reference one. MSI makes great aftermarket souped up nvidia cards, and asus makes great bioses for them lol.

You knwo MSI fails when it comes to motherboard power delivery, right now it seems the standard is when using DrMOS to use teh 35amp continuse 1mhz+ switching frequency ones, the good brands, renesas and vishay are on GB and MSI boards, this isthe first time i see an infineon branded DrMOS, but its nice to see them put out 50amp model as stated, i haven't looked. NVIDIA shoudl have opted for those, and who said those inductors/chokes on the board can handle 80amps? is that a joke?

One thing to note is that asus uses infineon MOSFETs, but not with integrated drivers (DrMOS)

NVIDIA saw this coming, or could have by seeing dead GTX 570s due to VRM blowups, they shoudl have seen this coming and the fact they didn't is just sad, its kinda like how MSI supplies a board with 6+2 phases and says each phase is equal to 4 of the competitor, well teh only competitor i can thinking of they are refering to is Giabyte, and no they use a different brand provne DrMOS with the same specs as teh MSi ones, i just find it funny how companies deal with VRMs, personally id rather have them over do it on anything i buy, at this stage/day a VRM is the last thing anyone shoudl be killing/worrying about kiling.

Sorry for the spelling, this computer doesn't have spell check.
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