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Crossfire 6870 or buy 7950, and questions about 7950

post #1 of 22
Thread Starter 
Ok currently I have an xfx 6870 with the dual fans.

Should I purchase another one and crossfire 2 6870's?
Or sell the 6870 and buy a 7950?

another 6870 will be around $190 before rebate on newegg. On top of that, ill need a motherboard that can crossfire so add another $200.

Im thinking if i sell my 6870 and maybe get around 130 for it, add 190 to that instead of buying another 6870 and i have about a $320 budget which puts me right at the 7950 price.

Logically, the 7950 will be the better choice because of budget constraints and I wont need a new mb for now. That actually applies to me because Im at like a $200 budget before selling my current card, so whatever i can get for that, add that to $200.

So now my question is, will my 955 bottleneck the 7950? Im at 3.8 GHz. I know i can go a lot higher but i shouldn't because of my crappy motherboard.

And two, what is the difference between this card, 7950 FX-795A-TDJC and this 7950 FX-795A-TDFC? the latter is $10 more before rebate and $30 after rebate. Specs look identical.

Also, how is the performance between 2 6870 vs 1 7950?

Any other opinions or suggestions will be appreciated, THANKS.
    
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post #2 of 22
Hello

If the hd6870 are 1gb you will be lacking vram in allot of games.

I think in these times its better to go with hd7950, even if that means a couple of days without gpu.

And if you are into GPU Ocing make sure you buy one that allows voltage tweaking when desired thumb.gif
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post #3 of 22
Thread Starter 
Quote:
Originally Posted by prescotter View Post

Hello
If the hd6870 are 1gb you will be lacking vram in allot of games.
I think in these times its better to go with hd7950, even if that means a couple of days without gpu.
And if you are into GPU Ocing make sure you buy one that allows voltage tweaking when desired thumb.gif

yes the 6870 is the 1 GB version. I do agree that 1GB of vram is starting to become obsolete. Being without a gpu is no problem, I guess thats one of the benefits of having a crappy motherboard, it comes with onboard video.

thanks for the input,

1 - 7950
0 - 2x 6870
    
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post #4 of 22
I wouldn't bother crossfiring 6870's, especially if you'd have to buy a new motherboard in order to do it. The only difference between the FX-795A-TDJC and FX-795A-TDFC 7950's is that the former includes a second DVI port.

Given your budget, you should consider this 7970 currently selling at Amazon for $312:
http://www.amazon.com/Diamond-Radeon-GDDR5-Graphics-7970PE53G/dp/B006UACSZ4/
(You may need to select Amazon from the More Buying Choices on the right side of the page)
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post #5 of 22
Just come from crossfired 6870's.. And gone to a 7950, not that i have recieved it yet smile.gif. The 6870's were bad ass at 1080p i won't lie! there wasn't a game i played that i couldn't get high fps on. However, the 1gb was starting to hurt, and more so since i upgraded to a 1440p screen. You should go with the 7950 as having to buy another mobo is a p.i.t.a and 7950 oc is something to behold!
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post #6 of 22
Well just about anybody will tell you to get the 7950 because it has less power usage and heat and is only one card, so you can upgrade later. However if you don't mind those reasons, then you might want to get a second 6870 because I would think the performance would be only a tiny bit less than a single 7950, especially when you overclock the 6870's.
     
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post #7 of 22
I would also vote for a second 6870 IF you didn't need a new motherboard, so 7950 is the better option for you.

I went from 2x 5870s to a single 7950 and there is a big difference in performance for gaming, especially for higher resolutions.
    
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post #8 of 22
7950 > 6870 CFX in every way.
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post #9 of 22
Its a no-brainer. sell your HD 6870 and get a HD 7950 OC card like the Gigabyte HD 7950 Windforce (900 Mhz). clock for clock HD 7950 is 3 - 5% slower than HD 7970. with voltage tweaking you can hit 1.15 Ghz speeds . In the latest DX11 games the HD 7950 will beat HD 6870 CF and even HD 6950 CF and provide much more consistent performance without any multi GPU issues like micro stuttering. Also HD 6870 cannot run the highest settings in games like BF3 (Ultra 4X MSAA ) because it will run out of VRAM and stutter badly. Power consumption will be lesser on HD 7950 OC compared to HD 6870 CF. HD 7950 OC will also be a cooler running setup.

http://www.techpowerup.com/reviews/Sapphire/HD_7950_Vapor-X/31.html
http://www.techpowerup.com/reviews/Powercolor/HD_7850_PCS_Plus/9.html

BF3 1920 x 1200 4x AA

HD 7950 (1135 Mhz) - 74.8
HD 7970 Ghz (1050 Mhz) - 72.3
HD 6950 - 36.8
HD 6870 - 31.4

here is a user running HD 7970 at 1200 Mhz and commenting on the much smoother experience compared to HD 6950 CF.

http://www.overclock.net/t/1310462/sapphire-7970-oc-dual-x-benchmark-comparison-stock-vs-overclocked
Edited by raghu78 - 9/27/12 at 11:13pm
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post #10 of 22
I'm sure there is no 7950/7970 thread you will ignore raghu. wink.gif
    
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