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The Radeon RX 7900 XT(X) Owners Thread.

Has anyone had an issue with random massive FPS drops? Just recently built a new system, 7800X3D and a 7900 XT. New Windows 11 install. I'm on the 23.5.2 drivers. All chipset, etc drivers installed. I've only really played Rust since setting this system up and for the most part, it runs fine. But I'll get very infrequent and random FPS drops. Down from say 90+ fps down to 8fps. This last for about 10 seconds then returns to normal. No idea what is causing it or what the pattern is.

A guy I play Rust with who also has an all AMD system says it happens to him too and not just on Rust (so its not game specific). He just put it down to AMD drivers!
 
That is not normal at all. Have you overclocked either of the cards at all ? They are quite tricky to get a stable OC and if you do not do it right then you will experience exactly what you are seeing.

Oh one more thing that may be the issue. You say you updated the chipset drivers , did it have the normal 7000 series chipset drivers before you updated for the 7800X3D chipset drivers ? If this is the case it is a known issue and you have to do a clean instal of windows then instal the 7800X3D chipset drivers.

Edit- Have you enabled SAM in the BIOS ?

  1. Enter the System BIOS.
  2. Navigate to Advanced Settings or Advanced menu.
  3. Enable “Above 4G Decoding” and “Re-Size BAR Support”
 
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Not that many details but the TLDR are all the PCB are high quality and nothing major to be concerned about on any of them. The Asrock Aqua card has the highest power limit with a bios update and the XFX Merc has the noisiest and worst cooler out of the AIB partner cards.
If only I still had my X570 Aqua.
 
That is not normal at all. Have you overclocked either of the cards at all ? They are quite tricky to get a stable OC and if you do not do it right then you will experience exactly what you are seeing.

Oh one more thing that may be the issue. You say you updated the chipset drivers , did it have the normal 7000 series chipset drivers before you updated for the 7800X3D chipset drivers ? If this is the case it is a known issue and you have to do a clean instal of windows then instal the 7800X3D chipset drivers.

Edit- Have you enabled SAM in the BIOS ?

  1. Enter the System BIOS.
  2. Navigate to Advanced Settings or Advanced menu.
  3. Enable “Above 4G Decoding” and “Re-Size BAR Support”
Will check the bios later but pretty sure it’s enabled. I installed Windows and had all the drivers ready to install on a usb drive so they got installed pretty quickly after first boot.
 
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You cant faulty OcUK free shipping. Ordered Late friday afternoon, and delivered today.

Now its been a while since I had a AMD GPU. Can someone point me in the direction of setting it up, undervolting etc.
There's an Auto Undervolt feature in AMD software > Performance > Tuning menu. https://www.amd.com/en/support/kb/faq/dh3-020

Try that for starters and see how you go. It'll probably reduce core voltage -0.025mv or so.
 
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You cant faulty OcUK free shipping. Ordered Late friday afternoon, and delivered today.

Now its been a while since I had a AMD GPU. Can someone point me in the direction of setting it up, undervolting etc.
Been awhile for me as well, last amd cards we had were 5850s, 5870, 7970.

This video gives a basic but good starting point to understand what to do, seems easy enough just a bit tedious if you want to try push for better UV/OC.

I'd imagine the same applys to the xt. Least I hope it's a good guide hah.
 
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