Perhaps an GTX 285
or 2*GTX 260 user can get closer to ATI 4850 (High Benchmark 17 sec) or ATI 4870 (15 sec)
in High around 29 sec
(my 8800GTX=59 sec, 9600GT=80 sec) is fastest GTX gpu until now, but far away from the units speed of the 48xx.
Also shader unit MHZ may give little speed boost some GTX 260
showed 1348 MHz
, some 1408 Mhz
in the benchmark mode result window!
Thanks for the multi GPU
Can you perhaps use newer slg 1.5.4
(in High Benchmark Mode) - gives 2 times more sec needed (High Mode does excat double work, reason was less % overhead for OpenCL in the time which is always about 0,5-1,0 sec CPU dependent for compiling OpenCL on the fly.
Would be also interesting if you perform an GPU only task with sponza scene
, which is new and does huge load to gpu.
I get avg. 16 kSamples/Sec GPU only
threads sponza with my 8800GTX
. Your two gpus, shown in help screen, should perform at least 29 kSamples/Sec.
Let sponza scene run a while - at least until samples goes from 0 to 16 or 32 to get stable avg. result.
EDIT: I got Results from iMac 27" ATI 4850M : 21 sec in High Benchmark mode. Slower than 4870 (15 sec) but even faster than GTX 260.
Shaderspeed (lots of units) of ATI 48xx cant
get cracked by older Geforces.
will do - i am sure.For sure, in overall gaming speed isnt so much different as in OpenCL speed !
ATI 4870 is not 4 times faster than 8800GTX running an game!