New build switching off

[DEL 707]

I put together a new PC build today.

My basket at Overclockers UK:

• 1 x AMD Ryzen 7 Eight Core 2700X 4.35GHz (Socket AM4) Processor - Retail= £319.99
• 1 x Toshiba 2TB P300 7200RPM Performance Hard Drive (HDWD120UZSVA)= £52.99
• 1 x MSI Optix G24C 24" 1920x1080 VA FREESYNC 144Hz 1ms Curved Widescreen Gaming Monitor= £209.99
• 1 x OcUK Value Blu-ray / DVDRW combi SATA - OEM= £55.99
• 1 x Phanteks Enthoo Pro M Glass Midi Tower Case - Black= £94.99
• 1 x Bitfenix Formula Series 750W 80 Plus Gold Power Supply= £82.99
• 1 x Alpenfohn Ben Nevis Advanced CPU Cooler - 130mm= £25.99
• 1 x Gigabyte Aorus RGB 16GB (2x8GB) DDR4 PC4-25600C16 3200MHz Dual/Quad Channel Kit= £199.99
• 1 x Gigabyte Radeon RX VEGA 64 WindForce OC 8GB HBM2 PCI-Express Graphics Card= £439.99
• 1 x Gigabyte Aorus GA-AX370-Gaming K7 AMD X370 (Socket AM4) DDR4 ATX Motherboard= £149.99
• 1 x Kingston 16GB DataTraveler 100 G3 USB 3.0 Flash Drive (DT100G3/16GB)= £4.49

Total: £1,653.29 (includes shipping: £15.90)
​

Was all going well, Windows installed, updated chipset and graphics drivers. Motherboard BIOS is on it's latest release.
Cards running at 144Hz and Freesync is enabled.

I tried to play Vermintide 2, the machine turns off after a few seconds. It won't turn back on until I disconnect it from the mains.
Works if I run the game at it's lowest settings, but once I go higher it crashes.
I ran a Prime95 small FTT's test for over 10 minutes with no problem, max temp was 75oC.
Downloaded and ran Furmark and as soon as a click GPU Stress Test, the machine turns off.
What I don't understand is that I was able to complete a 3DMark bench test earlier.

It looks to me like the graphics card is connected properly.

 

[ANDARIAL]

All cables in tightly?
Got another psu you could try?
Try a different wall socket maybe?
Same for a new/different kettle lead

 

[DEL 707]

Thanks.

Made this post in a bit of a panicky moment.
A couple of people replied on my build thread and suggested I use 2 different PCIe cables, instead of the 1.
So far so good, Furmark running and not crashing!

 

[ANDARIAL]

Glad you got it sorted

 

[Figo]

Thanks.

Made this post in a bit of a panicky moment.
A couple of people replied on my build thread and suggested I use 2 different PCIe cables, instead of the 1.
So far so good, Furmark running and not crashing!

Yup that will do it! glad its sorted...

 

[EsaT]

That was working as intended.
Bitfenix Formula has those current limited wire groups, called "multple rails" by marketroids and card simply spikes over current limit.
Though those should be set at 35A, so that card is sure really gulping up "juice".
https://www.techpowerup.com/reviews/Bitfenix/BF750F/2.html

"Single" rail PSU wouldn't have done that.
Though for input voltage and ground reference stability (current causes voltage losses in both) it's anyway always better to use separate cables to feed graphics card's connectors.

 

[X x X]

That was working as intended.
Bitfenix Formula has those current limited wire groups, called "multple rails" by marketroids and card simply spikes over current limit.
Though those should be set at 35A, so that card is sure really gulping up "juice".
https://www.techpowerup.com/reviews/Bitfenix/BF750F/2.html

"Single" rail PSU wouldn't have done that.
Though for input voltage and ground reference stability (current causes voltage losses in both) it's anyway always better to use separate cables to feed graphics card's connectors.

I got a fury x .. using one wire.
Shall i use both ?