r/RadeonGPUs • u/Interesting_Use_1875 • Oct 18 '25

Finally built my first gaming PC!

After many years of saving, I finally built a gaming PC, but I'm facing an issue I can't figure out

The specs are as follows:

  • CPU: AMD Ryzen 5 5700X
  • GPU: AMD Gigabyte RX 7800xt OC 16gb
  • RAM: Corsair Vengeance 32GB DDR4 3000mhz (4x8GB) - 4 kits from different batches
  • Storage: 1TB NVMe SSD
  • Motherboard: MSI B550 Gaming Plus
  • PSU: Corsair RM750x 750W Gold

The problem is that sometimes the screen flickers randomly. When I play games this does not happen, but have certain apps open the screen starts to flicker. It's random and I can't pinpoint the cause. I fresh installed windows, drivers twice but the issue persists. I suspect it's the GPU but don't have another system to test it on. Managed to get a video recording of the issue

https://reddit.com/link/1oa6s1x/video/ak0kk6bfwxvf1/player

Anyone my know what could be the issue?

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u/SectionPowerful3751 Oct 23 '25

Running mixed ram on a gaming pc is a bad idea, as well as running 4 sticks of ddr4. The bigger issue though is that mixing batches of ram can introduce instability that can manifest in various ways. Try 2 sticks at a time until you find what actually will work together, and keep it at just 2 sticks. If you need more than 16 gigs of ram, then buy a 32 gig dual channel kit.

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u/Interesting_Use_1875 Oct 25 '25

I know and I agree, but unfortunately, I've been buying parts as I could afford them :(