Any of you guys seen these motherboards?http://www.asrock.com/mb/intel/h81%20pro%20btc/

Dedicated mining motherboards lmao. Designed for extra pci express power so you dont need powerd risers

Cant help but question, if you dont need powered risers the why is there a 4 pin connector for powered risers? just to be safe?

A bit of research on Fermi performance with the new X-perimental kernel (Dave Andersen's work ported over to Fermi)

GTX 560Ti 1280MB: 0.83 kHash/s with -X 8x1    <--- the low VRAM is really hurting
GT 630 4GB VRAM: 0.72 kHash/s                      <--- low cost, low performance. The RAM doesn't help
GTX 660 OEM 4GB VRAM: 1.25 kHash/s             <--- that is one strange OEM part, I must say.

The new code is about 50% faster then the existing Fermi kernel for scrypt-jane. But I do get occasional
validation errors on Fermi + Kepler when I enable -C 1 or -C 2. Strange. Hence avoid Fermi parts like the
plague if you intend to do scrypt-jane.

In comparison.

A GT 640 (GK107) 4GB at stock clocks will do something in the range of 1.65 kHash/s. This is somewhat less than I expected
because my GT750M laptop part (same chip) delivers 2.1 kHash/s.

A GT 640 (GK208) 1GB GDDR5 manages to do 1.25 kHash/s with mild overclock. Again the low VRAM is hurting.

I will be getting more Kepler parts for comparison. GTX 650, GTX 650Ti (not the Boost version) with 2GB each.

Christian

No you use normal risers. Powerd risers are used when you have so many cards because power is also deliverd to the gpu through the pci-express lanes. Only so much can be sent through them without destroying your motherboard as the power to it is supplied through 1 connector. This uses molex sockets on the motherboard to supply the extra pci express power needed to run so many gpus.

That way normal risers can be used. As powerd risers are more expensive

I think you might be looking at it backwards - that plug is there to add extra current into the motherboard, not to get current out..

I was just looking on amazon to buy another matching 660 ti PE so that I can run one constant and have the existing one for normal use and I saw this card that just looks a bit weird to me..Sparkle PC GeForce GTX 660Ti 2 GB 256-Bit ATX Graphics Card SX660TI2048MHI by Sparkle PC http://www.amazon.com/dp/B00ABGU3M8/ref=cm_sw_r_udp_awd_Bnb2sb1GT5RNH


Its a 2 gig card which is fine but it has a 256 bit memory bus which is not like any other 660 ti because the highest I've ever heard for a 660 ti is the PE cards that have 192 bit and the reference ti has less if I remember correctly and then finally in the description it says its Fermi based...but 660 ti are all Kepler gpus....?

I complete the survey but I made a mistake...
The result for GTX 770 4GO is with N = 14 and not 15

There is a GTX 760 in there and the user claims he cranked up the gpu core clock by +352. I have not seen any test/review that got past 190-200, depending on the manufacturer, before the cards more or less crashed instantly in the benchmarks. He either made a mistake or has some magical oc powers.