Question Is this old 750w enough?

[Rigs]

I've got a pretty old Corsair TX750w PSU that I've been using for years now. Haven't had any problems until now. I recently upgraded my PC, but kept the old PSU, thinking it would do the job.

My current specs are:
OS: Windows 10 Pro (latest updates)
CPU: 9600k OC'd to 4.8Ghz (1.3v)
GPU: AMD Vega 64 Reference
MOBO: MSI MPG z390 Plus
RAM: 2x 16GB DDR4 3200 Corsair Vengeance RGB PRO
Cooler: EVO 212
Storage: Sabrent Rocket 1TB NVMe with 4 other SATA drives
PSU: Corsair TX750w

link to PSU on amazon: https://www.amazon.com/Corsair-CMPSU-750TX-750-Watt-Certified-compatible/dp/B000X2677A

Anyway, when I'm gaming sometimes a loud high pitched continuous beep comes from the tower. I assume it is the MOBO warning me that there isn't enough power or that my temps are too high.
When this beeping occurs, the GPU is at around 70-75C and the CPU is 65-70C. Not sure what to try to remedy this.

Edit: I'm going to try to lower the CPU voltage, and see if that has any affect. Havent had any crashes at 1.3v so I'm thinking 1.28 should be fine.

 

[vapour]

That is very good quality unit, you can use it

 

[Rigs]

I found the cause of the beeping. It's from setting my maximum GPU power limit to +50%. This allowed the GPU to draw over 300w from the PSU under load. Setting the limit to +20% seems to work fine; however, I'm wondering why the beeping occurs when there should still be enough power from the PSU. Any ideas?

 

[Csib1337]

You Can count the beeps and check after. The number of beeps means a message. The only problem with old Psu is that its old. Psus Are always working if its too old maybe malfunction can occur and cause a more expensive damage than a Psus price. 750w is cool enough.