Question 1

Would this power supply be enough for a gtx 770, and a b75m-d3v motherboard with a I-5 processor? 64 bit 8 gig ram.

Accepted Answer

This powersupply would b plenty. Im running a i7 3970x with 64gb ram and a nvidia gtx 780 acx cooler with a seasonic 1250watt supply and i have no issues. This supply should b fine.

Question 2

How do you turn this thing on? One of the answers said the power is always on, but the manual says to turn the "IO" switch to "1", but there is no "IO" switch. The answer also said there was a safety switch on the power cable, but I don't see one. I tried shorting the motherboard on/off jumpers, but that didn't work.

Accepted Answer

It might be defective.  I bought one that didnt turn on at all also, i contacted LEPA to get it replaced and they gave me a run around. i still have it, I spent 500 bucks and its not working. mine sat for a while not being used and i missed my window to return it. The company doesn't stay behind their warranty, return it if you can. Im out of money on mine.

Question 3

I want to run three gpus in crossfire but they say minimum system requirement 750watt psu that would mean i need one greater than 2,225watts or would this be fine these are the gpus SAPPHIRE R9 290X 4GB GDDR5 this is the system A88X-G45 GAMING with AMD A10-7850K and 32gb (4 x 8GB) 240-Pin DDR3 SDRAM DDR3 2400 ram do you think this psu would be enough for this build?

Accepted Answer

The Sapphire GPU has a 8-pin and a 6-pin power connector so max is 300 watts(PCIe=75w, 6-pin=75w, 8-pin=150w). It doesn't say but most likely it runs at 250w so 3x250w=750. TDP for the cpu is 95w. Say 10w per hard drive and some for RAM/Motherboard.
Call it about 1000w minimum and you may want 1200 at least to be safe.
The minimum requirement of 750w psu is for one video card + normal system of MB/RAM/CPU/HD/etc. with some leeway to not overwork the psu.

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