RadMos

Nvidia says MINIMUM POWER SUPPLY REQUIREMENTS Minimum 550W or greater system power supply, with a 12V current rating of 40A. I think the problem is the PS. You need a better one. A bit of useful information. Nvidia Geforce GTX 4*0 in SLi - 55-60A and a 850W PSU minimum GeForce GTX 480 - 40A and a 600W PSU minimum GeForce GTX 470 - 35A and a 550W PSU minimum GeForce GTX 295 in Quad SLi - 70A and a 1000W PSU minimum GeForce GTX 295 - 50A and a 700W PSU minimum GeForce GTX 285 - 46A and a 550W PSU minimum GeForce GTX 280 in SLi - 55A and a 800W PSU minimum GeForce GTX 280 - 40A and a 550W PSU minimum GeForce GTX 275 in SLi - 50A and a 800W PSU minimum GeForce GTX 275 - 40A and a 550-600W PSU minimum GeForce GTX 260 OC in SLi - 50A and a 700W PSU minimum GeForce GTX 260 OC - 40A and a 550W PSU minimum GeForce GTX 260 in SLi - 50A and a 700W PSU minimum GeForce GTX 260 - 38A and a 500W PSU minimum GeForce GTS 250 - 32A and a 500W PSU minimum GeForce GT 240 - 35A and a 400W PSU minimum GeForce GT 220 - 30A and a 350W PSU minimum GeForce 9800 GX2 - 35A and a 550W PSU minimum GeForce 9800 GTX+ - 32A and a 500W PSU minimum GeForce 9800 GTX - 25-30A and a 450W PSU minimum GeForce 9600 GT - 26A and a 450W PSU minimum GeForce 9600 GSO - 26A and a 450W PSU minimum GeForce 8800 Ultra - 35A and a 500W PSU minimum GeForce 8800 GTX – 30A and a 450W PSU minimum GeForce 8800 GTS 512MB - 28A and a 500W PSU minimum GeForce 8800 GTS 320/640MB – 26A and a 400W PSU minimum GeForce 8800 GT in SLi - 36A and a 500W PSU minimum GeForce 8800 GT - 26A and a 450W PSU minimum GeForce 8600 GT/GTS - 24A and a 350W PSU minimum GeForce 8500 GT - 22A and a 350W PSU minimum GeForce 7950 GX2 – 27A and a 400W PSU minimum GeForce 7950 GT – 22A and a 350W PSU minimum GeForce 7900 GTX – 22-26A and a 350-400W PSU minimum GeForce 7900 GTO – 22-26A and a 350-400W PSU minimum GeForce 7900 GT – 22-26A and a 350-400W PSU minimum GeForce 7900 GS – 22-23A and a 350W PSU minimum GeForce 7800 All - 26A and a 400W PSU minimum GeForce 7800 GS AGP - 20A and a 400W PSU minimum GeForce 7600 GT – 22-26A and a 350W PSU minimum GeForce 7600 GS – 15-17A and a 350W PSU minimum GeForce 7300 GT – 15A and a 300W PSU minimum GeForce 7300 GS – 15A and a 300W PSU minimum ATI Radeon HD 5970 CrossfireX - 70A and a 900W PSU minimum Radeon HD 5970 - 50A and a 600W PSU minimum Radeon HD 5870 CrossfireX - 55-60A and a 700W PSU minimum Radeon HD 5870 - 40A and a 500W PSU minimum Radeon HD 5850 CrossfireX - 55-60A and a 650W PSU minimum Radeon HD 5850 - 35-40A and a 500W PSU minimum Radeon HD 5830 - 35-40A and a 500W PSU minimum Radeon HD 5770 - 34A and a 500W PSU minimum Radeon HD 5750 - 30A and a 450W PSU minimum Radeon HD 5670 - 26A and a 400W PSU minimum Radeon HD 5570 - 24A and a 350W PSU minimum Radeon HD 5450 - 22A and a 300W PSU minimum Radeon 4890 - 32A and a 550W PSU minimum Radeon 4870 X2 CrossfireX - 1000W PSU minimum Radeon 4870 X2 - 600W PSU minimum Radeon 4870 - 32A and a 500W PSU minimum Radeon 4850 - 30A and a 450W PSU minimum Radeon 4830 - 26A and a 400W PSU minimum Radeon 4770 Crossfire - 34A and a 750W PSU minimum Radeon 4770 - 26A and a 400-500W PSU minimum Radeon 4670 - 26A and a 400W PSU minimum Radeon 4650 - 24A and a 350-400W PSU minimum Radeon 4550 - 20A and a 300W PSU minimum Radeon X3870 X2 - 30A and a 550W PSU minimum Radeon X38xx series - 28A and a 450W PSU minimum Radeon X2900 XT Crossfire - 45A and a 800W PSU is recommended for high-end rigs Radeon X2900 XT - 35A and a 500W PSU is recommended for high-end rigs Radeon X2900 Pro - 35A and a 500W PSU minimum Radeon X2600 XT - 25A and a 400W PSU minimum Radeon X2400 XT - 20A and a 350-400W PSU minimum Radeon X1950 XTX – 20A and a 420W PSU minimum Radeon X1950 Pro – 20A and a 420W PSU minimum Radeon X1900 XTX – 25A and a 520W PSU minimum Radeon X1900 XT – 22-25A and a 520W PSU minimum Radeon X1900 GT – 22A and a 400W PSU minimum Radeon X1650 Pro – 18A and a 350W PSU minimum Power supply recommendations: 700W - 1000W OCZ Z Series 1000W - 83A on a single +12V rail Corsair TX 950W - 78A on a single +12V rail PC Power & Cooling Silencer 910W - 74A on a single +12V rail Corsair TX 850W - 70A on a single +12V rail OCZ Z Series 850W - 71A on a single +12V rail XFX 850W Black Edition - 62A on a single +12V rail Corsair TX 750W - 60A on a single +12V rail PC Power & Cooling Silencer 750W Quad - 60A on a single +12V rail 300W - 650W Corsair TX 650W - 52A on a single +12V rail Seasonic X-Series 650W - 54A on a single +12V rail XFX 650W XXX Edition - 52A on a single +12V rail Rosewill Green Series 630W - 50A on a single +12V rail Corsair VX 550W - 41A on a single +12V rail Ultra X4 500W - 32A on a single +12V rail Corsair VX 450W - 33A on a single +12V rail PC Power & Cooling Silencer 420W ATX - 30A on a single +12V rail Corsair CX 400W - 30A on a single +12V rail PC Power & Cooling Silencer 370W ATX - 27A on a single +12V rail MSI Forum

I reach 3.8GHz with 1.45V almost stable (2 or 3 hours of prime) 100% stable only @ 3.7Ghz (C2) with CCF-120. Not bad your overclok.

This is my first ECS motherboard I'm very happy for her, decent overclock, all the connections I need for my HTPC, glad to see that the manufacturer is putting more effort into their products. With the 785GM-M my GSkill Ripjaws 1600MHz (red) work perfectly, which did not happen with the GB790GPT-UD3H, gskill forums are full of complaints of this combination and gives no solution, but no problem with the ECS.

About 45 seconds, after Ccleaner and disable some programs at start (steam, ventrilo, MS security essentials, messeger) 25 seconds.

Change the FSB of your CPU from 200 to 266 using unlinked mode to keep your memory a normal frec. Will earn a performance boost quick and easy.

Good result to start. My 555 does not reach 3.7Ghz unlocked (3.6ghz max stable). I had better luck with my 720 unlocked runs at 4GHz without problems.

I achieve 200MHz of memory overclock with the same card.