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Question

My PSU might have died and/or is old?

Feb 26, 2016 3:45PM PST

Hi I was recently playing CSGO and when I was in the middle of playing my computer turned off completely. I waited a few minutes and tried to turn it back on and it did not turn back on, so I unplugged the power waited a little, i hit the power button with it unplugged then I switched which outlet the power unit was plugged into and tried to turn back on my computer and it turned back on. My Psu and cpu is about 3 years old, I cleaned out my cpu and put a new cooler in there that has thermal paste and seems to be working, 22-28c in idle on motherboard. I also put in a new graphics card with a 8 pin connector. So do you think that my Psu died? I have the EVGA supernova NEX 750b. I appreciate any help thanks. it is not just Csgo it's whenever my computer is under a nice amount of load it shuts down, I did a small 3dmark test and walked away and came back and my pc was turned off, i tried to turn it back on and it did not turn back on until i switched the psu off and on, do you think my psu could be causing my pc to shut down during load?

Discussion is locked

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Clarification Request
Need a little more.
Feb 26, 2016 4:06PM PST

Think of the typical US car. If you drive it at 120 MPH it will need repair soon. Not so much at 65. Same idea for PSUs. I can't find PC details so I can't give a nod to this or that.

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Sure
Feb 26, 2016 4:19PM PST

Sorry!, here's my pc specs

Processor: AMD FX(tm)-8350 Eight-Core Processor
Memory: 16384MB RAM
AMD Radeon (TM) R9 390 Series
Disk & DVD/CD-ROM Drives
------------------------
Drive: C:
Model: TOSHIBA DT01ACA100 ATA Device

I have all the information you could need, let me know if you need anything else tyvm!

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what's the wattage of the PSU?
Feb 26, 2016 4:25PM PST

Dafydd.

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The wattage is
Feb 26, 2016 4:26PM PST

750 Watts

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From Tomshardware.
Feb 26, 2016 4:59PM PST

You didn't supply the exact R9 390 so let's use the peak Watts from this picture.
http://media.bestofmicro.com/0/H/514529/gallery/Power_w_600.png

So at peak we have 383 Watts.
The CPU has a TDP of 125 Watts and we add 40 Watts for the drives.

This clearly blows past the PSU's 20 Ampere rails ( http://www.newegg.com/Product/Product.aspx?Item=N82E16817438007 shows a QUAD RAIL unit) and would give you seemingly random power downs.

If only you had a single rail model then I'd check if we approached an Ampere issue but here, it's pretty clear this is the wrong PSU.

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The graphics card
Feb 26, 2016 5:02PM PST

The graphics card is the MSI R9 390, I heard that the max wattage for it is 300 watts

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And the rail is 20A which is 240 Watts.
Feb 26, 2016 5:33PM PST

300 is over the rail's capacity. I'll just write it. Stick to single rail PSUs unless you are conversant with Amps, Watts, Rail balancing, etc.

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Ok tyvm! im buying a the EVGA SuperNOVA 750 B2 80+ BRONZE
Feb 26, 2016 7:50PM PST

I did research and i was recommended the EVGA SuperNOVA 750 B2 80+ BRONZE, do you think it will hold up? someone told me it was fantastic