my little Scrypt-Rig
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1x Gigabyte HD7950
2x HIS HD7950 iceQ Turbo
ASRock Extreme4 970 Mainboard
AMD Sempron 145 CPU
4GB DDR3 Ram
30GB Seagate S-ATA 7200 HDD
TP Link USB WLan
1000w LC1000 V2.3 Legion X2 PSU
Windows 7 x64
1,96kh/s @ 820w form the Wall
Could you post the link where you got your 1x to 16x risers from? I know of some people that keep running into faulty ones.
I also get 2 faulty ones from some china ebay supplier, they were soldered badly with some wires short to others, but fortunately I get similar flat wire cable, resolder them completely and make them powered. It tooks a bit of time and patience, but they are fine and furthermore I made them twice as long as before (I found out they can be up to five meters long). I will add a picture of them later - I have to turn my RIG off and take them out, but its almost 7AM here and I am going to sleep