Hi everyone. Problem solved. It is true you need Bios A20. I have the E8500 Processor and works like a charm. Am upgrading soon to the extreme quad. I modded the case and made my own heat sink strap with a pice of metal I sheard off the back to fit a HD6970 Powercolor. Heat sink shrouding is in the way for 10" cards. I mounted the heat sink side ways with artic silver and put a 10000Rpm server fan on it. COOL AS A CUCUMBER! I have a 1050 watt bronze PS. This machine plays GTA 4 Sleeping dogs, Murdered Souls, Hit Man Absolution, Watch Dogs all at or above PS4 Or xbox one conditions. I really recommend spending the money in a 200$ - 400$worth of up grades and some handy work. it beats paying 500 hundred for a game system that wont keep up with this thing any ways. I nic named mine the "FrankinDell" Make sure you got at least six gb of 6400 ram. I have six Gskill and going to eight. Happy building. Will post pics when i stuff the readon 7950 Double D in it. This is the last class of card i can put in it before X16 2.1 Bottle necks. FYI the 755 sff has a 4gbs buss rating.
Oh You need to do the bios updates one after the other in succession. Go to dell chat and ask for direct windows install links. ALLOT EASIER!!!! HAPPY MODING
Quad : $120 or less, 8Gb 6400 666 gskil $50, readon 7950 Double D $125 Artic silver $7.....Moding PRICELESS total $302 xbox can eat it
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