Gigabyte GA-EX58-UD5 -> only Clr CMOS lit on first startup Tags: Gigabyte Motherboards Last response: June 8, 2009 9:32 PM in Motherboards Share simari_2009 June 7, 2009 7:42:34 PM Hi folks, Have just setup a new pc with the following spec in an Antec 1200 Twelve Hundred case: Intel Core i7 920 2.66Ghz Gigabyte GA-EX58-UD5 Intel X58 Sapphire ATI Radeon HD 4870 OCZ Reaper 6GB (3x2GB) DDR3 PC3-15000 (1866MHz) Tri-Channel Western Digital Caviar Black 1TB SATA-II 32MB Cache OCZ StealthXStream 700w Silent SLI Ready ATX2 Power Supply Sony Optiarc DRU-860S 22x DVD±RW SATAl On first startup, I hooked up just 1 mem stick (2gb) and left out the Sony optical drive. On powering up, all I see is the Clr CMOS switch lit up and nothing else. None of the fans startup, no other leds just the Clr CMOS switch, I've checked the following: - MB is seated properly with all grounding posts in place - Power cords secured into MB (2x4pin for the cpu and 20+4 pin for the MB) Am at a bit of a loss as to what I could try and do next since early indications suggest that no power is being supplied to the mobo or even the cpu. Any suggestions / help would be greatly appreciated. More about : gigabyte ex58 ud5 clr cmos lit startup simari_2009 June 7, 2009 10:23:21 PM Made some progress. Reseated all components including motherboard for the umpteenth time. However, finally realised that I was plugging in the power switch the wrong way !! Schoolboy error System started up with 1 mem stick, hd and graphics. Will add the remaining 2 sticks, optical drive and hopefully should be on my way to an enjoyable session of pc building doormatderek June 8, 2009 2:32:00 AM actually, it doesn't matter which way you plug the power switch in on the motherboard.... So that means it was a different problem... Can't find your answer ? Ask ! Get the answer bilbat a c 177 V Motherboard June 8, 2009 3:01:56 AM Ahhh - doormatderek has it right - the power switch is just a momentary contact spst pushbutton - no polarity involved... Yet another WTF moment in computer construction! simari_2009 June 8, 2009 9:32:14 PM Interesting, as this is exactly what I thought to begin with. But the only wire connected differently when it worked was the power switch, hence my assumption. I suppose rebuilding the pc from scratch a couple of times resolved any loose connections, grounding issues. Can't find your answer ? Ask ! Publish Read discussions in other Motherboards categories BIOS Boot Chipsets ASRock Asus Chaintech DFI Elitegroup FIC Foxconn Gigabyte Intel MSI-Microstar !