Hi, have some Tahiti card
cant take more then 900h.
Pitcairn 1Gb takes for me 710-730
Pitcairn 2Gb takes for me 740-780
Hawaii 4Gb - 1500-1700h
So.. Tahiti - 1100-1200 but only 820-890h
Win 7/64, 16.7.3 drivers.
Testing different drivers - nothing change
Playing with BIT_PTR64, HEAP_SIZE and others params - nothing change.
Detail - with downgrade clBUFFERSIZE to 2100Mb hashrate practicaly identical.
Where I"m wrong?
Hi, unfortunately this algo is memory heavy, and because of this amount of compute units is not always mean speed improvements. As example - GTX 750Ti can do 750-900kH/s. Which is pretty good result in comparison with GTX 1060(these do 1390-1470). Probably that old cards can do better, but I have no such cards to try optimize kernel for them %)
I understand quite well the particularities of cryptonight algos, I'm confused because of the little difference between the 256 bit Pitcairn and 384 bit Tahiti and almost in two times of inequility between Tahiti and Hawaii, moreover officially for MINERD it's declared that the stock speed of 280x is 970h. I'm tweaking all my cards and as it's determined in
"What to Expect
6990 - 1160kh/s
280x - 970kh/s (@1100/1500)
270x - 670kh/s (@1100/1500)
7870 - 550kh/s (@1100/1350)
6950 - 540kh/s "
so ,for example, "my" Pitcairn (7870) gives me ,as I have told before, 700-800h, "my" Cayman(6970_2Gb) - 740-760 and from 6990 I receive +\- 1300-1400h, "my" Hawaii gives 1500-1800. It's clearly seen that with the increasing of memory bus width we receive a sagnificant hashrate boost. It explains a little difference between an old 750Ti and GTX 1060,which has newer core , much faster VRAM, but only 192 bit memory bus which is bottleneck for this card. For eqihash, which is memory heavy too, eveything suits. Pitcairn give +/- 200, Tahiti +\- 300 and Hawaii approx. 400. I am giving such a deteiled picture,as it looks to me the reason lays in program or driver params,but not in hardware. Will appreciaete your help! Thanks!
У мeня тaм 1, пoтoмy кaк y мнoгиx ecть вcтpoeннaя гpaфикa для Intel и eё нaдo бы yчитывaть. Ecли нe пoмoжeт, cкинь тoгдa cвoй бaтник(зaключи тoлькo в тeги code или quote, чтoбы тeмy нe paздyвaть) и тeкcт, чтo выдaёт мaйнep нa cтapтe.