Looking for a replacement PSU

DMASie

Prominent
Apr 24, 2017
3
0
510
Hi all,

My system has been randomly rebooting for the last couple of weeks and has been getting progressively more frequent, it even reboots when I'm on the BIOS page.

My system is:
Corsair Graphite Series 600T Case with 2x 200mm fans
Coolermaster Silent Pro M850 PSU
Z97 GAMING 7
i5 4690k
Cooler Master Hyper 212 EVO (120mm)
Cooler Master 120mm Blade Master PC Fan
HyperX FURY Series 8 GB (2 x 4 GB) DDR3 1866 MHz
HyperX FURY Series 16 GB (2 x 8 GB) DDR3 1866 MHz
Sapphire Radeon NITRO R9 390 OC Gaming GPU 8 GB
LiteOn IHAS124-19B 24x Internal DVDRW
1 x Crucial M500 240GB SSD
2 x Seagate SATA 500GB HDDs

I checked the voltages and temperatures in the bios and it looks fine, I reset the BIOS to default.
I ran Memtest86+ when it started rebooting and found no problems with the ram.
I removed all hardware but my SSD and one stick of RAM and connected to the integrated graphics and it's still randomly rebooting.
I have tried the PSU in my old amd phenom ii x4 965 system and loaded it with my R9 390X, 5x SATA HDDs, DVD writer and 8GB DDR2 and it has been running for the last 3 days without any problems.

So is it the PSU or motherboard that's faulty?

If it's the motherboard I can RMA it.

If it's the PSU I'm looking at:

Corsair RMx Series RM850x
£121.07 (10 years warranty)
http://www.corsair.com/en-us/rmx-series-rm850x-850-watt-80-plus-gold-certified-fully-modular-psu

EVGA Supernova 850 G2
£122.92 (10 Year Warranty)
http://www.evga.com/Products/Product.aspx?pn=220-G2-0850-XR

EVGA SuperNOVA 850 G3
£129.93 (10 Year Warranty)
http://www.evga.com/products/Product.aspx?pn=220-G3-0850-X1

Corsair RMi Series RM850i
£135.98 (10 years warranty)
http://www.corsair.com/en-gb/rmi-series-rm850i-850-watt-80-plus-gold-certified-fully-modular-psu

Cooler Master Vanguard V850
£140.98 (Only 5 Year Warranty)
http://www.coolermaster.com/powersupply/v-series-psu/v850/

Does anyone have experience with any of these? or recommendations other than I have listed in the same price range?