[SOLVED] New GPU inexplicably crashing my machine

[JoeTb]

Hi

I bought a new GPU this week, which is crashing the PC randomly. I suspect the reason is down to the PSU, but if this is the case I'd appreciate an explanation of why this is. Rather than me just replacing a component "just because", any guidance regarding the technical reason would really help me to avoid similar pitfalls going forwards. Many thanks in advance!

Specs are:
EVGA RTX2070 Super XC Gaming
i5 9600k
PSU is an ACE 750W
Aorus pro z390
16gb ram
Samsum 850 evo SSD 1tb
Monitor is a measly 24" 1080p 60hz display

Firstly, whilst I believe the PSU wattage is more than enough, it doesn't have an 8 pin connector. So GPU requires a 6pin and an 8pin, the 6 pin is fine as is supplied by the PSU, but for the 8 pin I've connected via a 2x molex to 8pin adapter. I've heard this isn't ideal, but hear me out.

The GPU itself performs beautifully and runs Metro Exodus on ultra settings including ray tracing at a silky smooth 60fps at 1080p which is probably helped by the pretty modest display I have. Temp runs at around 50C (120F) but after say 10 minutes the system suddenly shuts down with no warning - everything goes blank, and the GPU fans go mental, suddenly spinning at full whack. I can't get the pc to respond without doing a hard reset, and I turn it straight back on only to find it's like nothing's happened, and again the GPU is running at a reasonable temperature.

If there was a power throttle, surely the fans wouldn't start going nuts like that? To me that's an indication it thinks it's suddenly overheated, but that's not the case either.

It does the same running a non ray tracing game, in this case A Plague Tale Innocence. Runs silky smooth, then just crashes everything after a few minutes with no warning.

I've reinstalled the GPU several times in case of a bad connection, and ensured the driver is up to date.

Any ideas?

Thanks

 

[cdrkf]

Hi

I bought a new GPU this week, which is crashing the PC randomly. I suspect the reason is down to the PSU, but if this is the case I'd appreciate an explanation of why this is. Rather than me just replacing a component "just because", any guidance regarding the technical reason would really help me to avoid similar pitfalls going forwards. Many thanks in advance!

Specs are:
EVGA RTX2070 Super XC Gaming
i5 9600k
PSU is an ACE 750W
Aorus pro z390
16gb ram
Samsum 850 evo SSD 1tb
Monitor is a measly 24" 1080p 60hz display

Firstly, whilst I believe the PSU wattage is more than enough, it doesn't have an 8 pin connector. So GPU requires a 6pin and an 8pin, the 6 pin is fine as is supplied by the PSU, but for the 8 pin I've connected via a 2x molex to 8pin adapter. I've heard this isn't ideal, but hear me out.

The GPU itself performs beautifully and runs Metro Exodus on ultra settings including ray tracing at a silky smooth 60fps at 1080p which is probably helped by the pretty modest display I have. Temp runs at around 50C (120F) but after say 10 minutes the system suddenly shuts down with no warning - everything goes blank, and the GPU fans go mental, suddenly spinning at full whack. I can't get the pc to respond without doing a hard reset, and I turn it straight back on only to find it's like nothing's happened, and again the GPU is running at a reasonable temperature.

If there was a power throttle, surely the fans wouldn't start going nuts like that? To me that's an indication it thinks it's suddenly overheated, but that's not the case either.

It does the same running a non ray tracing game, in this case A Plague Tale Innocence. Runs silky smooth, then just crashes everything after a few minutes with no warning.

I've reinstalled the GPU several times in case of a bad connection, and ensured the driver is up to date.

Any ideas?

Thanks

That PSU is horrible.... £23 on Amazon. The PSU is critical as if it's unstable it can damage your whole machine, it's not something you should cheap out on.

It's almost certainly the cause of your problem. As for why, in simple terms whilst the wattage of that supply is high enough, the stability of the output is likely to be the problem. A good quality supply with good components will provide a smooth constant output and cope with fast changes in the loading (something GPU's are known for as the compute requirements of the scene's being rendered can change rapidly e.g. there is suddenly a big explosion on screen). Cheap low quality power supplies will often drop the voltage or current output briefly when the load changes resulting in a dip or spike- which can result in your machine crashing if the spike is large enough.

 

[RARRAF]

as cdrkf said but you spend all that cash on a RTX2070 and then nothing on the PSU that drives it what a waste.

 

[JoeTb]

Righto, so it's unable to keep up with spikes in power despite being able to supply the overall wattage needed. What should I look for in a decent replacement?

Thanks again for the info

 

[JoeTb]

Gone and ordered a Corsair RM650x. Less overall wattage but hopefully better quality that can handle sudden increases in power requirements.

Thanks

 

[cdrkf]

Gone and ordered a Corsair RM650x. Less overall wattage but hopefully better quality that can handle sudden increases in power requirements.

Thanks

That is a much better unit, that should handle everything no problem. Let us know how you get on!

 

[JoeTb]

That is a much better unit, that should handle everything no problem. Let us know how you get on!

Thanks, will do!

 

[JoeTb]

Little update, I’m almost £100 poorer, but PSU is installed, and managed half an hour of Metro Exodus running at extreme settings including ray tracing, all running smoothly.

Once again many thanks for the great advice!

 

[antonr]

Little update, I’m almost £100 poorer, but PSU is installed, and managed half an hour of Metro Exodus running at extreme settings including ray tracing, all running smoothly.

Once again many thanks for the great advice!

What a useful thread for an onlooker. Dead giveaway that capable psu and stable psu is utmost importance for gpu's and one can only wonder how many of them have surrendered life because of bad psu fault
modes.