OK so im replacing a PSU on my SFF lenovo m82 computer that came with a 240watt psu. I added a low profile gtx 750ti and am getting power offs during gameplay. It should be enough power with 240watts to cover it but for the life of me i cannot figure out why it keeps shutting off and i have tried everything out it must be the psu at this point. possibly my psu is bad.
this mother board only has a 14 pin connector. it does no use 5v or 3.3v only 12v at 12amps(motherboard) and cpu 12v at 15amps, it does have 5.02vsb at 2.5amps and -12v at .2amps.
so this is a TFX form factor psu, so there are a few options but no many. most have lower amperage ratings on the 12v than mine does now even though they are rated at 300w (amps reserved for 3.3 and 5v)
so i came across this and already purchased the seasonic psu 300w
http://www.ebay.com/itm/251679406102?_trksid=p2059210.m2749.l2648&ssPageName=STRK%3AMEBIDX%3AIT
it has 20amp at 3.3v, 5v 20amp, 12v1 at 18amps, 12v2 at 18amps -12v at .6amps +5vsb at 2amps.
im going to have to modify/splice to get the old connector on the new plug.
I wont need the 3.3 or 5v, so cut those wires off.
now im left with 2 12v lines with 18 amps each. which is 2 amps higher for the cpu and 2 amps higher for the motherboard.
should this work for me? i dont understand why 12v 18amp and 12v2 18amp should be 216 watts each thats over 400watts right there why is the psu rated at 300watt? i dont get the math on how that calculate this. could i really pull 18amps from each 12v line continously?
the old supply says 12v1 + 12vCPU not excede 230watts but when you do the math 12amp and 16 amp thats 336watts? how are they calculating this? my new psu says 252watts max between the two 12v outputs. so im only getting 22 watts more.....
thanks for reading im sure it got confusing at points.
this mother board only has a 14 pin connector. it does no use 5v or 3.3v only 12v at 12amps(motherboard) and cpu 12v at 15amps, it does have 5.02vsb at 2.5amps and -12v at .2amps.
so this is a TFX form factor psu, so there are a few options but no many. most have lower amperage ratings on the 12v than mine does now even though they are rated at 300w (amps reserved for 3.3 and 5v)
so i came across this and already purchased the seasonic psu 300w
http://www.ebay.com/itm/251679406102?_trksid=p2059210.m2749.l2648&ssPageName=STRK%3AMEBIDX%3AIT
it has 20amp at 3.3v, 5v 20amp, 12v1 at 18amps, 12v2 at 18amps -12v at .6amps +5vsb at 2amps.
im going to have to modify/splice to get the old connector on the new plug.
I wont need the 3.3 or 5v, so cut those wires off.
now im left with 2 12v lines with 18 amps each. which is 2 amps higher for the cpu and 2 amps higher for the motherboard.
should this work for me? i dont understand why 12v 18amp and 12v2 18amp should be 216 watts each thats over 400watts right there why is the psu rated at 300watt? i dont get the math on how that calculate this. could i really pull 18amps from each 12v line continously?
the old supply says 12v1 + 12vCPU not excede 230watts but when you do the math 12amp and 16 amp thats 336watts? how are they calculating this? my new psu says 252watts max between the two 12v outputs. so im only getting 22 watts more.....
thanks for reading im sure it got confusing at points.
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