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PCIe 4 riser

Meronar
By Meronar
in Graphics Cards
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I've heard that if you use a PCIe 3 riser cable with a PCIe 4 GPU and video card it can cause issues, and you need to set the slot back to 3 in BIOS. I recently picked up an NZXT H1 and wanted to know if anyone could verify this for me so I could pick up a new riser cable before the case arrives rather than having to wait for that too. Thanks for any help!

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that was an early issue with X570 boards, last I heard it was patched thoroughly

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I was having exactly this thought earlier today - will my current riser cable (which I'm assuming is PCIe 3.0 compatible not 4.0 by default) cause issues when I upgrade my GPU later this year. It's a Thermaltake item I bought new off ebay, it came sealed in an antistatic bag but no box or label so I guess I'll do a bit of investigation via Google using the serial number on the cable itself.

 

I'll probably just try it when I upgrade my GPU and expect issues, if I don't get any then great, if I do then I guess I'll have to spend an extra bit to buy a 4.0 rated item, meh.

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I had issues with any video going extremely slow (youtube, twitch, and local files), and also my audio device (output to monitor) kept disappearing. Setting the PCIEx16 mode in the BIOS to Gen 3 fixed all these problems. Not going to worry about upgrading the riser cable until I see reports that there's a benefit for GPUs.

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The problem with using PCIE 4 risers in mini itx builds is that 4.0 risers usually have a max operating temp at around 50°C. Temperatures in mini itx cases may surpass 50°C when under load, which makes the riser go to 3.0 speeds.

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