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Topic: 7970 faster with 12.3 or 12.8? (Read 1554 times)

hero member
Activity: 1078
Merit: 502
September 14, 2012, 07:28:37 AM
#10
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....
hero member
Activity: 560
Merit: 500
September 14, 2012, 03:41:26 AM
#9
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  Sad

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  Sad
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
legendary
Activity: 952
Merit: 1000
September 13, 2012, 08:57:44 PM
#8
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://bitcointalksearch.org/topic/msi-afterburner-problem-after-reinstalling-windows-7-103636
member
Activity: 112
Merit: 10
September 13, 2012, 08:10:00 PM
#7
How are you guys able to downclock your memory? My memory seems locked at -150 Mhz of whatever core clock speed is =/
member
Activity: 65
Merit: 10
September 13, 2012, 07:54:02 PM
#6
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  Sad

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.
hero member
Activity: 560
Merit: 500
September 10, 2012, 04:09:19 PM
#5
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  Sad
full member
Activity: 140
Merit: 100
September 08, 2012, 12:09:08 PM
#4
12.8 should be faster
hero member
Activity: 700
Merit: 503
September 07, 2012, 08:19:32 PM
#3
12.8 is faster.
legendary
Activity: 952
Merit: 1000
September 07, 2012, 06:48:36 PM
#2
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%).
legendary
Activity: 1134
Merit: 1005
September 07, 2012, 05:11:08 PM
#1
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
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