[SOLVED] PC Shuts down (while gaming) after GPU upgrade

[teqson]

Hey. My PC randomly shuts down while gaming. I bet my PSU can't handle the new GPU. (I had a 970, recently got a 1080ti)
My PSU is quite old and I'm running a lot of stuff of it. Two screens, 3 storage drives, a sound card, and a huge CPU cooler. I know I have to upgrade my Thermaltake SE 530W PSU. I can get a fairly new 1000W Corsair RM1000X for a low price. Should I get it even though I won't use its full power? I know it's an overkill but I can get it for cheaper than a lower powered PSU. Quite strangely the PC shuts off only while gaming. I've done a benchmark on 3DMark and it went through without a hitch. Should I do something else or just upgrade the PSU?
Thanks.
My specs are:

ASRock Z170 Pro 4S
i7 6700K OC@4.4GHz
AORUS GTX 1080Ti
16GB Ballistix RAM
Thermaltake SE 530W

 

[Dark Lord of Tech]

Upgrade to a decent NEW 650w PSU.

 

[teqson]

Upgrade to a decent NEW 650w PSU.

Do you think it's enough power?

 

[Dark Lord of Tech]

Not really , because of the poor quality.

 

[teqson]

Not really , because of the poor quality.

I meant would 650W be enough to run my whole rig.

 

[nobspls]

There is a drastic difference for power requirements from a GTX970 vs GTX1080ti. A good 530W PSU when new would be borderline at best. And the Thermaltake SE 530W PS is only rated for 38Amps on the 12 volt lines which really not adequate for a GTX1080ti.

 

[Dark Lord of Tech]

I meant would 650W be enough to run my whole rig.

YES a good 650W would be a perfect fit.

 

[teqson]

Would this one do? https://www.silentiumpc.com/en/product/supremo-fm2-gold-750w/
It seems to be pretty solid.