in my rig i have 4x7990 ... as soon as i activate the onboard gpu for checking the miner on a monitor, the last gpu core won't get recognized properly and mining isn't working at all - system keeps rebooting.
aticonfig also can't get any data of that last core if onboard gpu is activated.
i have the Asrock FM2A58+ BTC (http://www.asrock.com/mb/AMD/FM2A58+%20BTC/) with 1 x PCIe 3.0 x16, 1 x PCIe 2.0 x16, 3 x PCIe 2.0 so technically there should be space for 5 cards (with each having 2 cores?!) ...
Another thingie: ... i played arround with different coins and i realized that a 7990 only gets something like 27MHs on ETH while it gets 45MHs on EXP. Shouldn't it be the same on both the coins since its the same algo?
And last question:
Would it be possible to implement one of thow eth-proxy clients optionally to point claymore to the local proxy which is pointing to the pool? As i understood, it should give additional hashrate and less delays in network.
Suprnova seems to suggest that one: https://github.com/ocminer/eth-proxy ... or is this old crap and dont have a sense anymore? I only remember of it from the beginning of ETH mining some years ago.