Thinking about adding a few 290x cards to my rig.
Do you think there will be a big difference in hash with the upcoming 390x cards?
As I understand it they are a rebrand of 290x but with 8gig memory instead of 4gig. Not sure how the memory differance will affect the mining output?
Honestly, I don't know. From what I've gathered from various inquiries into nvidia owners, the hash rate doesn't scale well with.... pretty much anything.
a 750ti gets 250 - 280 hashrate. From this I assumed a 980 (or .... i forget what it was.. something that shoulda been ridiculous) should have gotten..
well lets see... 750ti has 640 cores, 980 has 2048 cores.
So yeah. If it scaled with cores it would be 800 h/s our of that card. The highest I've ever seen reported is 400 h/s. That coulda been with a 970. Regardless, it was way less than expected.
And meanwhile, this guy:
https://bitcointalksearch.org/topic/high-hash-rates-mining-xmr-monero-with-gtx-570-getting-220-hs-1026287is reporting 220 h/s on a GTX 570, which has 480 cores.
My hunch is that cryptonight on GPUs has more to do with the speed of each processor that can access 2 MB of fast memory. So perhaps with the increased memory on the new card, you can push more cores through?
I dunno though, and I've only researched nvidia cards - no idea how the ATI architecture differs. I've found it odd that my 750ti only uses 1 gig of its RAM (it has 2 gigs), and I can't seem to push it farther with any thread setting.
