Overclock no longer stable after new graphics card- has this a power supply problem?

[capnfedora]

Hi all. I recently bought an RX Vega 56 after using an RX 550 as a placeholder for sometime. While the card works well, I found shortly after I got the card that my computer would freeze up seemingly at random- no BSOD, just a freeze. After much troubleshooting, I found reverting to factory settings on my Ryzen 1600x solved the problem. I had it overclocked to 4.0GHz at 1.385 v, which didn't crash on me once while I had my RX 550. When I tried overclocking it again, it would freeze.

I'm using a Thermaltake Toughpower 750W PSU. While trying to troubleshoot, I found that Thermaltake doesn't make as great of PSU's as I thought they did. The PSU is still under warranty, but before I return it I want to be sure this is the problem, as I would like to use my overclock again. My GPU is running cool enough at no more than 80C, and while overclocked my CPU was also at a safe temperature.

Specs: https://pcpartpicker.com/list/rM8dXP

 

[jay32267]

Check you PSU voltages while running under a significant load.

 

[sizzling]

Did the crashes only happen under heavy gaming load?

 

[capnfedora]

Did the crashes only happen under heavy gaming load?

Usually. Once it started crashing, it would be more prone to doing it if I rebooted the computer soon after. But most of the time, yes, it was while playing games.

 

[capnfedora]

Check you PSU voltages while running under a significant load.

How do I do this?

 

[Rexper]

How do I do this?

Using a digital multimeter. Find a molex connector that isn't being used, insert the black probe into a black wire of connector (ground), and the red probe into an orange wire (3.3V). Measure the voltages at different computer loads such as idle and gaming. Repeat this procedure except with the red probe in a red wire (5V), and another test with the yellow wire (12V).
If the voltages measured are not within specification (+-5% for each rail) your PSU may be causing issues.

 

[jay32267]

Thanks for explaining that Rexper. There is sometimes a -12 volt supply as well....and many times they say +/- 10%. Although I like 5%

 

[sizzling]

I wonder if it was ever stable but that since you have a new gpu pushing higher FPS the cpu is being put under more load and causing an instability to surface.