PSU issue I think.

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Joined
5 Oct 2007
Posts
620
Hello,
Last week I upgraded my graphics card from a Nvidia 660ti to a Radeon MSI 290x, a huge increase in power draw, tried it with my old TX 650 corsair and had my first ever instant shutdown of pc, so I looked around and did not have a huge amount of funds so I went with an EVGA 750 supernova the reviews seemed okay for it.

Both items bought from Overclockers

Any intensive game play and I still get an instant shutdown (not a graphics card crash or blue screen just instant no power) so I am assuming I need a better higher W psu.

A lot of the power calculators out there do not really cover what I have on my system some say a 650 is fine others go as high as 800w.

So here is my system, let me know if you think I am going the right way thinking of getting a seasonic or corsair 850.

Note** the only error report I get is after the shutdown asus volt protection kicks in telling my I have an unstable PSU.

i5 2500k intel cpu
Asus P8z77-V LX2
8gb DDR3
Seagate hybrid 1tb drive
Seagate 1.5 tb sata
MSI 290x twin fozzer 4gb
Custom liquid cooling system including
Laing DDC-1 12v
360cm Radiator
3 120cm Sharkoon fans (radiator)
1 120cm Sharkoon fan case
Scythe digital temp and fan speed read out
Internal Blu-ray drive
USB internal 3.0 card powered by psu
Logitech g600 mouse
USB keyboard
Logitech G13 gamepad
Razor megalodon headset (I know this has quite a draw)


I did a 24 hour prime95 test incase it was a cpu issue no problems and cpu never went above 32c


The signs do seem to point towards a psu issue and an OCCT psu direct x 11 test shut my pc down in 15 seconds.

Advice on psu is also appreciated.
 
No overclock on my cpu, the warning comes from the bios not windows software and my bios is fully updated, I have used the overdrive software in CCC to underclock my card my 20% which seems to have solved it till I can afford a new psu (my card was at factory setting not overclocked).
 
Looks like my system with the liquid cooling needs about 780w, if I reduce my card by 20% power/clock no shutdown no problems, take it back up to stock setting and it just peaks in heavy use games above what the EVGA psu can handle, so I am going to save up and grab an 850w.
 
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