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Watch your temps..the 4890 run hot like toasters. In fact they'd make a good hot plate to cook your breakfast on 
Umm, but have you tried -w 64?
I'm not sure what the optimal work size unit is for the 4890, but you can try -w 64 or -w 128 or -w 256 and see which works best. Or you can try to ask that question in this thread:
http://bitcointalk.org/index.php?topic=4122.0
Umm, but have you tried -w 64?
I'm not sure what the optimal work size unit is for the 4890, but you can try -w 64 or -w 128 or -w 256 and see which works best. Or you can try to ask that question in this thread:
http://bitcointalk.org/index.php?topic=4122.0
Nah it ain't going over 78°C got 2×200mm fans + 2×120mm fan.
Tried all of this, but they decrease from 8-10 Mhash
Ty for the link.
. So I'm mining with my "older" rig that has a AMD 4890 and I'm getting around 95 mhash/s with no flag. On the fifth side of this topic some1 said we should use -v -w128 on a 4890 but that decreases to 87Mhash/s. So do you folks have a better idea? 
