PDA

View Full Version : 6950 cf vs 6970



icow
22-06-2011, 10:07 PM
In the future I plan to upgrade my 460gtx. How much extra (if any) performance will 2 6950's get over a single 6970? Also I would need to factor in cost. I currently have a 600w psu (corsair gs) so I'm assuming ill have to upgrade that. My motherboard also only has 1 pcie slot and I would need a new case. I may also look into 3 screen gaming and 3d gaming in the future with performance in mind.

:pf1mobmini:

icow
23-06-2011, 07:56 AM
I would also be interested in "unlocking" the 6950's (if i was to get them/one). Extra shaders FTW!

pctek
23-06-2011, 08:15 AM
http://www.anandtech.com/show/4061/amds-radeon-hd-6970-radeon-hd-6950/13

Seems reasonable. But the cost may outweigh the benefits.
New MB as well to do it?

You can unlock the 6950 to make it a 6970, why not just buy one and do that?

SolMiester
23-06-2011, 08:34 AM
I dont believe there are any more unlockable 6950 about...They were the reference card batch and now all gone according to US sights.
You had to be careful to only unlock the shaders as the memory config is different and a few were bricking cards. However the difference between 6950 and 6970 and same clock speed is only about 3%, hardly worth risking your card over if you ask me, better off leaving the shader and clocking it up to the big brother speeds.
At any rate, the 7000 series & keplar will be out at year end, so buying a new CF setup now would be a bit daft.
Oh, and the 600w corsair is enough for CF 6950 too!

dugimodo
23-06-2011, 10:10 AM
Or you could just get a 2nd GTX460 and SLI them, save a lot of cash for similar performance.

After my first foray into dual card setups though I won't be doing it again, there are too many issues. My opinion is buy the best single card you can afford and leave it at that.

Disadvantages of SLI / CF
Heat - requires cards that vent to the rear and/or motherboard that allows an extra slot between cards. Also need a case with decent airflow.
Power - A single high end card usually uses a lot less
Physical space required
Program compatability, there are still a lot of games that don't benefit from SLI/CF

If I had bought a GTX 480 instead of 2 GTX 460's I would have been happier, and saved a lot of cash (I ended up doing a whole system upgrade in my determination to make SLI work).

Anyway Crossfire is great, as is SLI. As long as you know what you're getting yourself into and get it right. Myself I read reviews and benchmarks saying 2 x 460's were cheaper and better than 1 x 480 and leapt without looking.

my 2c

icow
23-06-2011, 08:35 PM
They stopped you from unlocking? Thats sad. That doesn't reall seem to be ati/amd like.

:pf1mobmini:

SolMiester
24-06-2011, 10:09 AM
They stopped you from unlocking? Thats sad. That doesn't reall seem to be ati/amd like.

:pf1mobmini:

Here is a thread about it

http://forums.anandtech.com/showthread.php?t=2173767