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GTX 570 SLI: Base EVGA vs Classified vs Twin Frozr - Page 2

post #11 of 23
If you plan on overclocking with default voltage, i'd save the money and buy reference cards. If you want to push the cards to the limit with 1.2v, I'd go with one of the non reference options. I'd lean towards the non-reference options either way, but if the $100 is that much of a concern, buy reference.

Another thing is that stigma on the reference models. If the time comes to sell, you'd have better success selling those twin frozr models than a reference.

I've had 3 reference 570s and none blew up. I ran the first two at 1.2v almost all the time, but for benchmarks only. I ran one card passed 1100 core with no issues.
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post #12 of 23
Quote:
Originally Posted by Jarobata View Post
I guess then my question is can my PSU handle it? On another thread someone said don't increase the voltage with only 750w. Am I missing out by not going down that path?
You're fine.

This is a copy/paste from another thread:

I have the two GTX 570's SLI under water at 1050mV's Core Voltage with 890MHz Core Clock and 2000MHz Memory Clock (still plenty of room for overclocking). I have 4x4GB memory, 16 fans, 1 pump, 4 SSD's, 4HDD's, a sound card, and an optical drive. My PSU is the Corsair AX1200, we're about the same efficiency (mine's a few % higher).

These are watts being read from the wall with a Kill-a-Watt meter:

219W's Idle

335W's CPU 100% load using Prime95 Blend test with an i7 2600k at 4.9GHz

601W's CPU not being stressed, GPU's being benchmarked by Unigine Heaven V2.1 default settings but with Anisotropy: 16; Anti-aliasing: 8x; and Full Screen at 1920 x 1200. 501W's with stock clocks and voltages on the GTX 570's.

687W's CPU 100% load using Prime95 Blend test and GPU's being benchmarked by Unigine Heaven V2.1 default settings but with Anisotropy: 16; Anti-aliasing: 8x; and Full Screen at 1920 x 1200. 595W's with stock clocks and voltages on the GTX 570's.

This is drawing from the wall with a PSU at about 90% efficiency. You have room.
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post #13 of 23
Your PSU will be fine with either option overclocked to the max they could take on air.

Something that I don't think anyone else has considered is the fact that you must run these cards sandwiched together because of the PCIe spacing on your motherboard. In that case I would recommend the reference cooler on either the EVGA Classy or reference (I would prefer the Classy) over the MSI. The MSI will have a harder time keeping the top card cool as well as you could run into issues with the fans of the top card hitting the back of the bottom card as the fan blades are pronounced above the shroud on that card. I've heard of this happening before and Newegg has denied the return as they called it user installation error, I don't know if MSI would RMA but that's not something I'd like to find out.

I do agree that the reference 570 VRM problems appear to be mostly behind us but I still don't like recommending the reference card when there is a better option available, so in my opinion the Classy is worth the $100 more (total, I don't think I'd pay $100 more per card).
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post #14 of 23
Thread Starter 
Quote:
Originally Posted by juano View Post
Your PSU will be fine with either option overclocked to the max they could take on air.

Something that I don't think anyone else has considered is the fact that you must run these cards sandwiched together because of the PCIe spacing on your motherboard. In that case I would recommend the reference cooler on either the EVGA Classy or reference (I would prefer the Classy) over the MSI. The MSI will have a harder time keeping the top card cool as well as you could run into issues with the fans of the top card hitting the back of the bottom card as the fan blades are pronounced above the shroud on that card. I've heard of this happening before and Newegg has denied the return as they called it user installation error, I don't know if MSI would RMA but that's not something I'd like to find out.

I do agree that the reference 570 VRM problems appear to be mostly behind us but I still don't like recommending the reference card when there is a better option available, so in my opinion the Classy is worth the $100 more (total, I don't think I'd pay $100 more per card).
It would actually be less than 100 more and I'm a big eVGA fanboy so I do like that option...
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post #15 of 23
Well excellent! Classy all the way is my recommendation then. OCN I am disappoint that nobody else picked up and the cards being sandwiched and therefore the MSI not being ideal here.
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post #16 of 23
Thread Starter 
Quote:
Originally Posted by juano View Post
Well excellent! Classy all the way is my recommendation then. OCN I am disappoint that nobody else picked up and the cards being sandwiched and therefore the MSI not being ideal here.
Feedback on this forum for the classified isn't exactly positive...many of them are actually very negative vs the MSI which are basically 100% positive. And when you it comes to close proximity, the side vent on the classified will have some of the same issues.
Edited by Jarobata - 10/7/11 at 11:38am
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post #17 of 23
Side vent? We're talking about the 570 classified here, which is like 99% external exhaust. I haven't heard anything bad about the 570 classified and see no reason to think that it would be a bad card. What exactly have you heard that makes you think the 570 is a bad card?
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post #18 of 23
Thread Starter 
Quote:
Originally Posted by juano View Post
Side vent? We're talking about the 570 classified here, which is like 99% external exhaust. I haven't heard anything bad about the 570 classified and see no reason to think that it would be a bad card. What exactly have you heard that makes you think the 570 is a bad card?
They added a port that blocked the external exhaust so they moved some of the ventilation to the side which vents hot air into the case:

http://www.legitreviews.com/article/1692/14/

If you read the newegg reviews there are a number of people who have to down clock or increase voltage just to get the card stable.

I think a lot of the negativity came from uninformed people who thought it was just an overpriced 570, not realizing the increase in power and cooling allows you to get to much higher speeds than most 570 cards.
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post #19 of 23
Ah I missed the stupid DP port they added and the increased side vent + rep. I think that only makes a minor difference though to be honest and when sandwiched together I would still choose it over the MSI. The problem with the cards sandwiched and the MSI isn't the exhaust, which is the minor change I missed, but the intake which the EVGA will still fair much better than the MSI in.
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post #20 of 23
Thread Starter 
Quote:
Originally Posted by juano View Post
Ah I missed the stupid DP port they added and the increased side vent + rep. I think that only makes a minor difference though to be honest and when sandwiched together I would still choose it over the MSI. The problem with the cards sandwiched and the MSI isn't the exhaust, which is the minor change I missed, but the intake which the EVGA will still fair much better than the MSI in.
I think I might just go for it and assume with OCN help I'll be able to stabilize it with proper voltage and maybe even squeeze out some extra hertz
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