Hello,
I got a Club3D royalQueen HD7970 and it is horrible performance-wise, or I'm doing something wrong:

I underclock the GPU to 900Mhz core clock and 750Mhz mem clock,
Set the Fans to 100%
Run cgminer with -I 7 (results in just 530MHash/s with those clocks) and the temps go up to 95°C and then the PC shuts down.
It runs at about 450Mhash/s if I don't use -I 7 which results in temps from 90-92°C...
I don't think this should be happening.. is anyone having the same problems or can help?

Für 1 BTC.
Mehr gibt's eigentlich nicht zu sagen.
Wäre von Vorteil, wenn jemand positive Bewertungen vorweisen kann.

Tach!
Ich bin jetzt seit etwas über 2 Wochen dabei und mich würde mal Interessieren, was ihr so an Mhash/s habt. Mein Bauchgefühl sagt mir schon, dass ich so ziemlich am unteren Ende liege wenn ich mich hier im Forum umsehe, das liegt aber wahrscheinlich daran, dass hier kaum Anfänger sind.
Rigs könnt ihr auch gerne posten bzw. eure Hardware.

So siehts bei mir aus:
Q6600+4GB DDR2 Ram+ HD5870 + HD 6870
Eine 2. 5870 kommt wahrscheinlich morgen dazu.
=> 745-750 Mhash/s

Hi.
I'm using a HD6870 and a HD5870, both of them are overclocked.
When I open MSI Afterburner I can change everything of my 6870, but when I switch to GPU2 I'm only allowed to change the Mem-clock, Core-Clock and Fan speed. I can't even see how much voltage it has and I have no idea why.
It's running at 930/300 stable though so I guess its not that bad.

Does anyone have experience in this?
I need to buy a new mainboard with either 4 Pcie or 3 Pcie 2.0 Slots.
The one with 3 Slots costs about 110€ and has 1x16, 1x8 and 1x4. I don't think the x8 Slot would be a problem, but what about the x4 Slot? Does mining need a big bandwith and does anyone have experience with an x4 Slot?
If it has a bad influence on the hashrate I'd buy a mainboard with 2x16 and 2x8 Slots, as a board with 1x16 + 2x8 Slots costs 185€ and a quad Crossfire board 'only' 200€.
These are the boards I'm talking about:

• x16+x8+x4: ASRock P67 Extreme4, P67 (B3) (120€)
• x16+2x8: Sapphire PURE Black P67 (185€)
• 2x16+2x8: ASUS P8P67 WS Revolution Rev 3.0 (200€)

I'd use 3/4x5870 on them. If you know any better boards please let me know.