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HD 6990 and BF3 - Page 4

post #31 of 56
this thread makes for interesting reading but i was wondering which will benefit me more? as an upgrade to my sig rig.
1 x 6990
or 2 x 6970
they are both the same price
same power usage aswell i think
i will need a new mobo if i go for CF yet i think i need one of those anyways
i will LC the cards so that leans me towards the single card in terms of mainly flow rate as my 360 rad should be ok i hope
but what do you think ?
i have been playing beta on my 5770 *kill me now* and i am switching from my ps3 which i spent a good 500 hours on bc2 :L
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post #32 of 56
Quote:
Originally Posted by Shrofff View Post
this thread makes for interesting reading but i was wondering which will benefit me more? as an upgrade to my sig rig.
1 x 6990
or 2 x 6970
they are both the same price
same power usage aswell i think
i will need a new mobo if i go for CF yet i think i need one of those anyways
i will LC the cards so that leans me towards the single card in terms of mainly flow rate as my 360 rad should be ok i hope
but what do you think ?
i have been playing beta on my 5770 *kill me now* and i am switching from my ps3 which i spent a good 500 hours on bc2 :L
You'll receive input of a staunch divide regarding this question. The 6990 has built-in advantages that make it, in my opinion, a better option than separate PCBs. That said, there are similar functional disadvantages that can be rectified, so long as the user plans their build appropriately. In your case, the potential disadvantage is anything but: heat. Since you've already integrated a water-cooling loop, the excess heat of two fully specced Cayman processors is nothing to fret. In fact, the problem is altered such to become a benefit. Instead of buying a pair of expensive 6970 waterblocks, fittings, crossfire connectors, & likely twice the flow restriction you can halve your cost with a single PCB solution.

As far as the intrinsic advantages of a single PCB chip? Judging from your avatar, high resolution framerates devoid of stutter will be a large concern, yes? Instead of traditional crossfire bridge & PCI-E bus data exchange found in dual PCB 6970 communication, the crossfire on a stick solution exchanges rendered screens & alternative GPU to GPU data exchange & sync via point to point transmission courtesy of PLX's PEX 6847 48-lane PCI-E bridge. Instead of soaking up systemic PCI-E bandwidth for gpu synchronicity, there is an efficient & fast subsystem on-board & engaged by default to significantly improve the efficiency of crossfire.

6990 cards are also vetted for clocks & voltage. The final cut is composed of cherry-picked Cayman GPUs, which explains the typical awesome overclocking results we have. That Powertune is unlocked & 5x1 portrait Eyefinity are a couple of cherrys-on-top of the cherry picked processors that, in my mind at least, make Antilles (under certain conditions) a better option.
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post #33 of 56
Quote:
Originally Posted by Shrofff View Post
this thread makes for interesting reading but i was wondering which will benefit me more? as an upgrade to my sig rig.
1 x 6990
or 2 x 6970
they are both the same price
same power usage aswell i think
i will need a new mobo if i go for CF yet i think i need one of those anyways
i will LC the cards so that leans me towards the single card in terms of mainly flow rate as my 360 rad should be ok i hope
but what do you think ?
i have been playing beta on my 5770 *kill me now* and i am switching from my ps3 which i spent a good 500 hours on bc2 :L
Since no one mentioned it, first the CPU, motherboard then 6990 + another 360 will benefit you
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post #34 of 56
Quote:
Originally Posted by Ken1649 View Post
Since no one mentioned it, first the CPU, motherboard then 6990 + another 360 will benefit you
Touche
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post #35 of 56
Thread Starter 
Quote:
Originally Posted by XXXfire View Post
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.
Yes i am considering putting the 6990 on water. Any recommendations on a block?

I just ordered the Diamond 6990 from TD. Surprised it was 30 dollars cheaper on TD over Newegg
post #36 of 56
Never heard of anyone complained this one. http://www.swiftech.com/epsilonhd-69...aterblock.aspx






I personally use Koolance VID-AR699, some users are not happy with Vregs temp but I have nothing to complain.

http://www.koolance.com/water-coolin...roduct_id=1117

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120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
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120GB x 4 RAID0 Raptor 300GB x 2 RAID0 CPU-370 CPU-370 
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post #37 of 56
Thread Starter 
Quote:
Originally Posted by Ken1649 View Post
Never heard of anyone complained this one. http://www.swiftech.com/epsilonhd-69...aterblock.aspx






I personally use Koolance VID-AR699, some users are not happy with Vregs temp but I have nothing to complain.

http://www.koolance.com/water-coolin...roduct_id=1117

Swiftech one is very nice indeed. Thanks Ken
post #38 of 56
GTX 480 SLI > HD 6990

So, you're wanting to downgrade?
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post #39 of 56
Thread Starter 
Quote:
Originally Posted by Diabolical999 View Post
GTX 480 SLI > HD 6990

So, you're wanting to downgrade?
Read 1 page back on the reasons why i'm dumping them

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.

Edited by Don Karnage - 10/3/11 at 8:41pm
post #40 of 56
You know 6990 is gonna raise it by 7F instead of 10F, right?

Either way you're putting high heat output products into your room. The problem is your room, not your video cards. You need better room airflow.
    
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