7970 faster with 12.3 or 12.8?

[chungenhung]

Got 2 7970 GPUs on a rig, running fine for weeks.
A program I use need to have 12.8 drivers.
I am currently using 12.3.
Would the 12.8 driver screw anything up? Would it be slower/faster?
Should I use the SDK that came with 12.8?
Thanks

[crazyates]

I have a 7970 on 12.8, and I get 692Mh/s with 12.8 at 1180MHz with CGMiner and all default settings (-v 1 -w  64). If you do notice any drop with 12.8 (and consequently SDK 2.7), it won't be hardly any at all (less than 1%).

[Aion2n]

12.8 is faster.

[betatest512]

12.8 should be faster

[Badonkadonk]

im currently using multi 7950`s, and only change i noticed was +3-5c. running them at 1100/675...
think i need some risers tho cause the first card in both rigs is running at 88c while the other is at 74c 

[btcnut]

im currently using multi 7950`s, and only change i noticed was +3-5c. running them at 1100/675...
think i need some risers tho cause the first card in both rigs is running at 88c while the other is at 74c 

Try tightening the screws on the heatsink assembly

Also check in CGminer (or AB) that your fans are running at the same RPM.

One of my cards runs at 2000 rpm @ 39% fan where as all of the others run at 2150-2250. The low RPM card was obviously always hotter than the others, until I bumped up the minimum fan to 42% in cgminer for that card. Tightening the heatinsk assembly was also worth about 2-3 degrees as the screws had loosened a little.

[squid]

How are you guys able to downclock your memory? My memory seems locked at -150 Mhz of whatever core clock speed is =/

[crazyates]

How are you guys able to downclock your memory? My memory seems locked at -150 Mhz of whatever core clock speed is =/

MSI AB. See this thread here: https://bitcointalk.org/index.php?topic=103636.0

[Badonkadonk]

im currently using multi 7950`s, and only change i noticed was +3-5c. running them at 1100/675...
think i need some risers tho cause the first card in both rigs is running at 88c while the other is at 74c 

Try tightening the screws on the heatsink assembly

Also check in CGminer (or AB) that your fans are running at the same RPM.

One of my cards runs at 2000 rpm @ 39% fan where as all of the others run at 2150-2250. The low RPM card was obviously always hotter than the others, until I bumped up the minimum fan to 42% in cgminer for that card. Tightening the heatinsk assembly was also worth about 2-3 degrees as the screws had loosened a little.

77% fan speed on the low temp cards and 99% on the others, i think its just cause there closed in so tight, have a wifi card in between, only place i could fitt it 
was thinking about getting watercooling for them but rly dont know much about it or what to buy, noone seems to have a complete pack, atleast not in norway

[AndrewBUD]

Water cooling is a lot of work and can become very expensive... You need a pretty hefty "WC" system to cool multiple GPU's....


I would get some risers and keep the cards further away from each other....