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HD 6990 and BF3 - Page 3

post #21 of 56
6990 works great in BF3, I'm getting above 95% GPU usage on all 4 GPU's. Though I can't clock mine anywhere near 1000/1500 like most other people here >.>
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post #22 of 56
Quote:
Originally Posted by Jmatt110 View Post
6990 works great in BF3, I'm getting above 95% GPU usage on all 4 GPU's. Though I can't clock mine anywhere near 1000/1500 like most other people here >.>
I wouldn't say most people here reach 1000/1500. Neither would I say most people, as an absolute majority, are able to attain those clocks. The odds certainly improve for well designed watercooling setups, though; nevertheless, the deciding factor (narrowed down from a handful of contributing variables) is sheer luck. Good chance one of your Antilles PCBs can climb to & above 1000 on the core..though being lucky for one card isn't enough, as the limiting factor is going to be the weakest chain-link.

As mentioned, your respective cooling system substantially impacts your potential. PSU & feeding those wattage hungry cards will be very, very important for maintaining stability at high clocks. Tuning the voltage, ensuring you aren't pushing excess but not sub supplying the device (& the potential of one card needing, hypothetically, 1.215 for 1000 MHz core & it's brother needing 1.25 for the same) .. tuning a pair of these ladies, like juggling multiple girlfriends, only gets harder the more that you slide in.

Anyway, the 6990 is going to handle this title with aplomb. I'm stoked to enjoy it in final form. As is, though, the scaling is exceptional. Quad-crossfire 6990s are going to handily render this girl maxed out in 3x1 landscape or portrait.
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post #23 of 56
Thread Starter 
Found a buyer for my 480's so i'm probably going to order today. Whats a better brand to go with?

Diamond or Sapphire? Leaning towards diamond for the 5 year warranty
post #24 of 56
Quote:
Originally Posted by Don Karnage View Post
Found a buyer for my 480's so i'm probably going to order today. Whats a better brand to go with?

Diamond or Sapphire? Leaning towards diamond for the 5 year warranty
All 6990s are reference design, one specific brand will not perform better or worse than the other. Go for the brand that you know have provided good service in the past.
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post #25 of 56
Selling 480s + $250 for a 6990?


Why? x8 x8 isn't going to matter, at least go 2x 2gb 6950's...

Honestly this makes no sense to me.
    
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post #26 of 56
the game works fine in SLI/XF.....
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post #27 of 56
game works brilliantly with crossfire and a 6990. Scaling is well about 90% too as GPU utilisation is extremely high across all 3 of my GPU's. Even when I just run the game at 1080p on a single monitor my GPUS are taxed at around 70% each.

It is a very well coded engine and will eat up as many cores as you can give it.
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post #28 of 56
Quote:
Originally Posted by BallaTheFeared View Post
Selling 480s + $250 for a 6990?


Why? x8 x8 isn't going to matter, at least go 2x 2gb 6950's...

Honestly this makes no sense to me.
I have to agree. It really isn't sensible, unless you opt for triple or quad crossfire. The out of pocket cost will be relatively enormous. Triple 6970, though, is a stellar load of performance with 2nd best-in-class framebuffer (first in class will run you 1800$+) @ 900$.

Otherwise, exchanging dual 480s for a 6990 will achieve... damn near equitable performance. Quite a bit of effort to swap out phenomenal GPUs for a phenomenal GPU. That said, clock capabilities of 6990s capably push beyond twin 6970s to the tune of 15-25%; though if running properly cooled 480s, you'll find they scale up exceptionally well, also.

I hear people say twin PCBs are always better, but frankly, it's not the case anymore. All three 6990s I've tested scaled beyond 1 GHz / 1450 MHz .. whereas from the 6 or 7 6970s tested, only a pair of them ascended to the Antilles capability. Yes, on water (although fairness dictates I mention, most of them got within 2-3%).
Edited by XXXfire - 10/3/11 at 3:47pm
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post #29 of 56
Thread Starter 
Quote:
Originally Posted by BallaTheFeared View Post
Selling 480s + $250 for a 6990?


Why? x8 x8 isn't going to matter, at least go 2x 2gb 6950's...

Honestly this makes no sense to me.
Quote:
Originally Posted by XXXfire View Post
I have to agree. It really isn't sensible, unless you opt for triple or quad crossfire. The out of pocket cost will be relatively enormous. Triple 6970, though, is a stellar load of performance with 2nd best-in-class framebuffer (first in class will run you 1800$+) @ 900$.

Otherwise, exchanging dual 480s for a 6990 will achieve... damn near equitable performance. Quite a bit of effort to swap out phenomenal GPUs for a phenomenal GPU. That said, clock capabilities of 6990s capably push beyond twin 6970s to the tune of 15-25%; though if running properly cooled 480s, you'll find they scale up exceptionally well, also.

I hear people say twin PCBs are always better, but frankly, it's not the case anymore. All three 6990s I've tested scaled beyond 1 GHz / 1450 MHz .. whereas from the 6 or 7 6970s tested, only a pair of them ascended to the Antilles capability. Yes, on water (although fairness dictates I mention, most of them got within 2-3%).
While i agree with you guys this upgrade is not totally about performance. 480's in SLI turn my room into a sauna and i'm kinda getting annoyed with it. They can easily raise the temperature by a good 10 degrees while gaming. They are awesome and i love them but i can't take the heat much more which is why i want to get rid of them. I looked over the graphs and the 6990 runs cooler and eats a lot less power. I think it's like almost 490w for the 6990 and 668w for the 480's.
post #30 of 56
Quote:
Originally Posted by Don Karnage View Post
While i agree with you guys this upgrade is not totally about performance. 480's in SLI turn my room into a sauna and i'm kinda getting annoyed with it. They can easily raise the temperature by a good 10 degrees while gaming. They are awesome and i love them but i can't take the heat much more which is why i want to get rid of them. I looked over the graphs and the 6990 runs cooler and eats a lot less power. I think it's like almost 490w for the 6990 and 668w for the 480's.
Makes a lot more sense, now I should look back over the preceding pages, but am suffering eyestrain, so I'll just ask: are you going to put her under water? 6990s are really, really high potential cards. You'll be able to crush stock 6970 performance by, as mentioned, as much as 25%. Even if you just crank the fan up, you'll likely be 100 MHz beyond a single Cayman processor @ default. Use the AUSUM (ugh) BIOS, though, as it unchains the Powertune protection. Just watch heat.

Depending on how much you get for those 480s, have you considered triple crossfire? That's really the sweet spot for insane performance at relatively superb cost.
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