7950 Model?

[nookiegirl]

It seems that are lots of different ATI HD 7950 models out there.
Which are the criteria to look out for when buying a 7950 suitable for BTC and LTC mining?

[Shaban]

http://www.newegg.com/Product/Product.aspx?Item=N82E16814202006

This is the one I got

[traderman]

I got some MSI recently. They seem good, they get hot though.

[pro]

It seems that are lots of different ATI HD 7950 models out there.
Which are the criteria to look out for when buying a 7950 suitable for BTC and LTC mining?

try to get a msi or sapphire one. these cards u can easy undervolt which will save u watts.

[nightminer]

I love the heatsinks on the ASUS one.

http://cdn4.wccftech.com/wp-content/uploads/2012/07/ASUS-HD-7950DC-II-Revision.jpg

Just look at the blades on that puppy.

With a target temp of 62 in cgminer, the fan is always at 0% (about 1700 rpm). Make a big differnce if you rig is in your office where you have to work and game too (I work from home).

[nookiegirl]

Thank you guys!

For the 7950 card, what are good (recommended) values for core and memory clock as there also seems to be quite some difference?
I do mean the stock clocks, not the ones you have already customized.

[btcfanx]

I think there's no difference between different vendors of HD 7950. All of them use standard PCB board. The main difference is in cooling system and (maybe) in BIOS.

[pekv2]

http://www.overclock.net/t/1378557/sapphire-100352-4l-and-21196-00-20ghd-7950-the-final-holy-grail-of-hd7950s

[nightminer]

I prefer to lock the card in its specs as set by the manufacturer. For the asus card I use these extra options for cgminer

Code:

 --auto-fan --gpu-engine 800 --gpu-memclock 1250 --temp-target 64C

The ASUS is clocked a bit slower (800Mhz) than the saffire, but I get a decent 425Mhp/s at intensity 9 without the card breaking a sweat. That and I can still sell the card on the very active second hand market 6 months down the line without feeling bad.