AMD Athlon II X2 250 Regor 3.0GHz Socket AM3 65W Dual-Core Processor Model ADX250OCGQBOX GIGABYTE GV-N94TOC-1GI GeForce 9400 GT 1GB 128-bit GDDR2 PCI Express 2.0 x16 HDCP Ready SLI Supported Video Card GIGABYTE GA-MA770T-UD3P AM3 AMD 770 ATX AMD Motherboard hec X-Power Pro 600 600W Continuous @ 40°C ATX12V V2.2 SLI Ready CrossFire Ready Power Supply Antec Three Hundred Black Steel ATX Mid Tower Computer Case 2 Stick Patriot ddr 3 This system is put together with an older HD that is working. When I turn on the power I get light, fans but bios will not load and I get no cpu beeps. Have returned and replaced the mobo, cpu, vid card, power supply and ram. Tried different case and monitor. HD works in another pc. I am completely stumped. Thought for sure it was the mobo but just got a new one in and its still doing the same thing. Get nothing on the monitor, no signal. Have used different cables to the monitor as well. According to Gigabyte, everything is compatible. Any more ideas? Added- From Gigabyte support "Athlon II X2 250 is supported on this board, but if current mother board bios is F1 only that need to update bios to F3 support processor." Does this make sense to anyone?