do you get this with kernel 3? you have 512mb 6950?
--kernel 3
ATI hd6870 1GB DDR5 (OC, timings moded)
Claymor 9.7 - 290 Hs
SRB 1.4.4 - 154 Hs+-
xmrstak - 171 Hs+-
try kernel 2
I --usekernel 3
--kernel 3
SAPPHIRE ATI hd6870 1GB DDR5
Claymor 9.7 - 250 Hs
SRB 1.4.4 - 186 Hs+-
xmrstak - 280 Hs+-
--kernel 3
SAPPHIRE ATI DIRT3 6950 TO BIOS 6970 2GB DDR5
Claymor 9.7 - 350 Hs
SRB 1.4.4 - 320 Hs+-
xmrstak - 320 Hs+-
this is more interesting. What is your version of the drivers? Windows?
xmrstak - 280 Hs+- - new algo monero7?
drivers 14.4 windows 10 pro 64bit, monero7, my config xmr-stak is;
// gpu: Barts memory:638
// compute units: 14
{ "index" : 1,
"intensity" : 224, "worksize" : 8,
"affine_to_cpu" : false, "strided_index" : 2, "mem_chunk" : 7,
"comp_mode" : true
},