Topic: Which Radeon card is better for mining? A 7950 HD or a 7970 HD? (Read 1850 times)
I have 2 gigabyte 7950. Running at 530Mh/s x 2, and pretty quite too.
7950, no doubt.
7950HD is what i will recommend. =)
reallisticly I think they are about the same...
for ref my 7950 pulls ~540 khash in reaper
for ref my 7950 pulls ~540 khash in reaper
There is no point in buying 7970 for mining. It offers no benefits over 7950, while 7950 is cheaper, delivers same MH/s and drain less power which is impossible to ignore when talking about efficiency ratio BTC/Watt [when you pay for electricity].
One thing which I want to point out. If you can, please avoid cards with 80mm fans (if you work/sleep near PC anyway
). Those are realllly noisy when card is running at full tilt. I know, bought 2 7950 MSI TF3. Jesus what a racket. My GTX580 TF3 (was using it previously for little mining) is nowhere to be heard, but 7950s mounted in same case just klanking like passing nearby Heavy Panzer Battalion.
One thing which I want to point out. If you can, please avoid cards with 80mm fans (if you work/sleep near PC anyway
). Those are realllly noisy when card is running at full tilt. I know, bought 2 7950 MSI TF3. Jesus what a racket. My GTX580 TF3 (was using it previously for little mining) is nowhere to be heard, but 7950s mounted in same case just klanking like passing nearby Heavy Panzer Battalion. 
I figured he was trolling...
HD7950 for sure because it's more cost effective. I am currently running 3x7950.
none of them. get an 5850 oc it and get 340MHASH
dude that is half of what my 7950 gets.
Dang, I have just bought a 7970, someone please tell me there is some benefit of 7970 over 7950
I'm currently mining with 2x 7950s, in different machines, and am averaging a combined 1.05Gh/s, without any overclocking. One card is running at about 470-480MH/s and the other at about 525-535MH/s.
I kept having problems with (although I only had 1 and the card was bad) 7950. Ended up changing with two 7870's.
Thing is even when it was stable the fan was pretty high just to maintain 80C. I can barely hear the 7870's.
7950 - 100% stock is around 450ish - I was able to pull a max at one point of 585MH/s
2x7870 - around 875MH/s overclocked - almost the same as two stock 7950's
And its not BSOD/locking up and going down for 10 hours waiting for me to run back to the office (where I'm not paying for electricity)
Thing is even when it was stable the fan was pretty high just to maintain 80C. I can barely hear the 7870's.
7950 - 100% stock is around 450ish - I was able to pull a max at one point of 585MH/s
2x7870 - around 875MH/s overclocked - almost the same as two stock 7950's
And its not BSOD/locking up and going down for 10 hours waiting for me to run back to the office (where I'm not paying for electricity)
none of them. get an 5850 oc it and get 340MHASH
I just put the order for the Gigabyte 7950 yesterday. I hope it turns out better than the 7970 HD from XFX Force. I'm on my third return in just four months (turn around time is almost a month...do the math).
The increase in hashrate that the 7970 offers does not justify the increase in price. MSI Twin Frozr 7950 or Gigabyte 7950's are probably the best in terms of Hash/$ ratio. Plus they can be overclocked a bunch.
7950!
I would go for a 7950... or four ones...
it's starting at 225€ / 300$
€ : http://www.grosbill.com/redirect.php?site=shopping&ectrans=1&page=http%3A//www.grosbill.com/4-sapphire_ati_radeon_hd7950_bioshock_infinite_crysis_3_-178710-informatique-ati&utm_campaign=178710-carte%20graphique&utm_medium=cpc&utm_source=shopping&refresh=ok )
$ : http://www.newegg.com/Product/Product.aspx?Item=N82E16814125414
it's starting at 225€ / 300$
€ : http://www.grosbill.com/redirect.php?site=shopping&ectrans=1&page=http%3A//www.grosbill.com/4-sapphire_ati_radeon_hd7950_bioshock_infinite_crysis_3_-178710-informatique-ati&utm_campaign=178710-carte%20graphique&utm_medium=cpc&utm_source=shopping&refresh=ok )
$ : http://www.newegg.com/Product/Product.aspx?Item=N82E16814125414
I think if you crossfire 7950 and 7970, 7970 card will work with the speed of 7950. The optimum is to have identical cards, otherwise you are wasting the better card.
That's the chart I was referring too. I forgot to put it in the link.
Have a look here:
https://en.bitcoin.it/wiki/Mining_hardware_comparison
https://en.bitcoin.it/wiki/Mining_hardware_comparison
to mine you don't activate crossfire 
go gigabyte 7950 3 fans
go gigabyte 7950 3 fans
So I'd just insert both in the case and have the GPU's mine separately then. I know it's probably not ideal to combine 7970 and 7950 but I already have a 7970 coming my way and have store credit at a store that only sells 7950s.
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