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HD 6970 Quadfire questions - Page 3

post #21 of 50
If you really are set for 4 x HD 6970 then better get 1 x HD 6990, 2 x 6970.
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post #22 of 50
Thread Starter 
Quote:
Originally Posted by DirektEffekt View Post
Unfortunately the way eyefinity works doesn't assign one card per monitor (which arguably would be better in some situations) but rather all your monitors plug into the first card and all the graphics processing goes through there where crossfire is concerned.

This means that you have the regular crossfire scaling so you will still have very good performance but the scaling won't be perfect. And the 4th card may add perhaps 40% of a single card's worth of fps in those situations.
Quote:
Originally Posted by Ken1649 View Post
Only high resolution such as Eyefinity will benefit with Quad setup to fully utilize the horse power. So 4 is definitely better than 3.
Ohhh okay, so if i understand this right, for eyefinity since its a higher rez 4 gpus would be better but on a single monitor 3 gpus would be more ideal because of scaling and it wouldn't really benefit from the extra power with a single monitor

I was planning on going multi monitor in the future (thinking around February- april) so just trying to plan for the long term >_<

Quote:
Originally Posted by ZealotKi11er View Post
If you really are set for 4 x HD 6970 then better get 1 x HD 6990, 2 x 6970.
ah the 6990 would use less power and have less heat then two 6970's? (since two 6970s cost $400 and one 6990 is about $600) would the extra $200 to get a 6990 be beneficial overall? if it is i might go that route if it would help with overall performance
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post #23 of 50
I am not looking at cost/performance but sheer horse power. In any situations, 4 GPUs is the ultimate, but would it be useful for daily gaming other than benchmarking? With a regular 1920x1200 monitor, no added benefit in game play going from 3 to 4 GPU. But if a single monitor 2560x1600 or a 120 Hz will benefit from the extra horse power. A single AMD card such as 6970 is capable of Eyefinity 4 monitors of 2560x1600 each. The higher resolution the more GPU power is needed to render a smooth and playable frame rates with decent amount of Quality settings if not all maxed.
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post #24 of 50
The 6990 should use a bit less heat and power than 2x6970s, but it doesnt quite scale as well. Not much in it though.

Seriously, if youre on 1080 1 monitor, then 2 cards is more than enough. If you go 3 screens, 3 cards should still be enough. I dont think you need 4 cards, but hey if its just cause you can...do it
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post #25 of 50
Quote:
Originally Posted by DNytAftr View Post
Reps

Thanks! ill prob put in the order for all 4, try it out. And if it doesnt make a huge difference my friend said he would buy it if i was not interested since hes on a pretty tight budget

hmm im going to see if i can fit at least a 360 or a 240+ 120 rad in the rig for the gpus at least but i think i have a way to fit two 240's (side panel) in the case but not 100% sure

okay so sounds like the psu can definitively power the gpus. But yeah im using a gigabyte am3+ ud7 board, i think that someone said if i was to run quadfire that it would be running at 8x8x8x8x speed across the pci-e which if i remember reduces performance 2-10% depending (vs 16x)

Just a general question for anyone:
just trying to understand >_< , but if i was to do an eyefinity set up would think 4 cards would be better since it would have 1 card per-a-monitor plus the 4th gpu which would add some "horsepower" to the other cards? vs if i had only 3 cards?
There is little difference doing x8/x8/x8/x8 versus x16... not that x16/x16/x16/x16 is even possible. How many boards chipset have 64 lanes that you know of?

Anyways, when you are pushing 3 monitors, you ideally want 3 cards or more. 4 cards will get you comfortable frame rates on the killer, make me pc cry games like Metro and Crysis X.

Quote:
Originally Posted by DNytAftr View Post
Ohhh okay, so if i understand this right, for eyefinity since its a higher rez 4 gpus would be better but on a single monitor 3 gpus would be more ideal because of scaling and it wouldn't really benefit from the extra power with a single monitor

I was planning on going multi monitor in the future (thinking around February- april) so just trying to plan for the long term >_<

ah the 6990 would use less power and have less heat then two 6970's? (since two 6970s cost $400 and one 6990 is about $600) would the extra $200 to get a 6990 be beneficial overall? if it is i might go that route if it would help with overall performance
6990x2 suck up a lot of juice. Sometimes I think they suck up more than anything. If you search you'll find the post your wattage thread. 6990 quads in high clock settings are pushing past 1300 watts off the freaking wall! My 6950 quads are around a 1000w and 6970s are not far off.

Don't believe anyone that tells ya 6990s use less juice. Just find that thread. It'll make your eyes pop out.
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post #26 of 50
Quote:
Originally Posted by tsm106 View Post
6990x2 suck up a lot of juice. Sometimes I think they suck up more than anything. If you search you'll find the post your wattage thread. 6990 quads in high clock settings are pushing past 1300 watts off the freaking wall! My 6950 quads are around a 1000w and 6970s are not far off.

Don't believe anyone that tells ya 6990s use less juice. Just find that thread. It'll make your eyes pop out.
That thread was started by Phaedrus2129 and listed the wattage draw from the wall with my signature rig on IBT and Furmark. I think I recorded 1496watts peak draw.
     
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post #27 of 50
Thread Starter 
Hey guys, sorry for the late response, but after some thought and talking to my friend ive decided to keep my order for all 4 cards. Im going to be using 3 of them but i will be selling the last one to my friend to use at the cost i payed for it

Hes going to need it for 6-9 months and after that i can buy it from him for $100 (which im thinking ill prob use it for a SFF build after i get it "back" him).

But like what others said here using the 4th one will barely give me any gains (less then 10% from what it seems). I was just wondering, if the cards dont scale well at the moment is it possible for scaling to improve in the future? or is scaling going to be about as good as it gonna get right now?
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post #28 of 50
Drivers at this point probably won't do much to improve the scaling performance, it's going to be down to better design to increase the scaling performance.
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post #29 of 50
Thread Starter 
Quote:
Originally Posted by DirektEffekt View Post
Drivers at this point probably won't do much to improve the scaling performance, it's going to be down to better design to increase the scaling performance.
ah okay, i wasn't sure if there were any plans for ATI to work on improving scaling or not, really wish that the cards had a way to better utilize the third (and fourth) card more, but at least the 3rd card still has a decent gain. +rep
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post #30 of 50
Quote:
Originally Posted by DNytAftr View Post
ah okay, i wasn't sure if there were any plans for ATI to work on improving scaling or not, really wish that the cards had a way to better utilize the third (and fourth) card more, but at least the 3rd card still has a decent gain. +rep
Yeah, unfortunately the scaling doesn't gain that much after the first few driver releases of each generation. The scaling has progressed quite a way since the original multi-card setups. I can promise that you will see a nice bump with that third card, in certain situations it will take it from unplayable to nice and buttery smooth
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