benefits of PCI-E Gen 4.0/5.0 GPU riser cable

[orange_smurf]

Hi, I have a Vertical Graphics Card Holder Kit from Cooler Master that fits perfectly in my case. The product page states, "This product is only compatible for devices that support the PCI-E 3.0 specification. If you use this product with a motherboard that supports PCI-E 4.0, please enter into BIOS option and select PCI-E 3.0 before installation".

I plan on buying an RX 9070XT, so, my question is, is it worth swapping out the cable for one that supports PCI-E 4.0/5.0, or is it just a waste of money? From what I've read, a PCI-E 3.0 cable should be fine, but, is there less chance of having issues with a PCI-E 4/5 cable? i.e. are there any real term benefits?

Thanks in advance.


My basket at OcUK:

• 1 x Kolink PCI-E Gen 5.0 Riser Cable 90 Degrees - 300mm Black (SKU: CAS-KLK-01404) = £54.95
• 1 x Kolink PCI-E Gen 4.0 Riser Cable 90 Degrees - 220mm Black (SKU: CA-06U-KK) = £36.95

 

[orange_smurf]

Afaik, a 5090 loses around 4% (on average) with a PCI-E 3.0 board, so I'd expect the loss to be fairly small, BUT RDNA4 is a completely different architecture and has less VRAM.

I'd just wait a few more days for reviewers to post what they found, even though I suspect the answer will be: don't bother.

I'd hold off for now, not sure how reliable Gen5 risers are at the moment.

I don't know how I missed it, but, "Tech Jesus" covered the topic recently; NVIDIA RTX 5090 PCIe 5.0 vs. 4.0 vs. 3.0 x16 Scaling Benchmarks.

I'll take your advice and hold off for now, given that RDNA4 is untested.