NVIDIA GeForce RTX 5090 PCI-Express Scaling

[Upgrayedd]

Wtf is happening with Elden Ring

 

[Dr. Dro]

What is fastest PCIe 1.1 CPU Athlon 6000+

Core 2 Extreme QX9770. Although, if memory serves me right, some of the very latest and absolute fanciest socket 775 boards already supported PCIe 2.0.

 

[Cipher908]

I mean surely people have learned their lesson by now that it doesn't really matter about the bus speed or connection lanes, when they all cried out that RTX 30 series would be unusable if they didn't have a PCIe 4.0 system no matter what CPU they had..

 

[Heiro78]

You're failing at context. The bottleneck is more the CPU than the PCIe bus. The point of W1zzards efforts here is to assure the buying public that if they still have a board with PCIe 4.0 the card performance will not be adversely affected. Even an older gen board with PCIe 3.0 will not bottleneck this card by enough to matter.

Cipher was either being facetious or sarcastic. In other words, they were joking

 

[lexluthermiester]

Cipher was either being facetious or sarcastic. In other words, they were joking

One would hope. Sadly, many who make comments like that aren't.

 

[THU31]

PCI-E 5.0 might actually be useful in the 5060 8 GB, as the card will be running out of VRAM in every new game!

 

[jesdals]

would love to see how the rtx 5090 performs on AM4 and a 5950x

 

[Wirko]

An external GPU enclosure using TB5 (similar to PCIe 5.0 x4) would give you almost all the performance. That's pretty nice.

Hm, it's somewhat worse.
TB5 or USB4 = 80 Gbit/s per direction = PCIe 2.0 x16

But, realistically, with components you can buy today, you get 40 Gbit/s to your eGPU. That's one of the reasons the slowest results of W1zzard's test are relevant too.

 

[lexluthermiester]

would love to see how the rtx 5090 performs on AM4 and a 5950x

My guess is that it's going to be highly dependent on the resolution you play games at. And let's face facts, the 5090 is a 4k monster. If you're not playing at 4k, what are you doing with a 5090?!?

 

[_roman_]

Thanks for the test.

All in all, if you're on a Gen 4 x16 platform, relax, you lose close to nothing with an RTX 5090, and any performance delta from our numbers is only because your processor is slower than a 9800X3D. This also applies to the Alder Lake and Raptor Lake crowd that plans to use an RTX 5090 on a Gen 5 x16 slot that's running at x8 because a Gen 5 NVMe SSD is eating away the remaining lanes. If you're on older Gen 3 x16 or Gen 4 x4 (i.e. you accidentally installed the card in the wrong slot), it would be hard to spot a noticeable performance loss, although there is one to be had. TechPowerUp GPU-Z is a nice way to know if you've messed up your installation. As for the academically-relevant PCIe settings, well, these are our numbers, your RTX 5090 won't crash, but a quarter of its performance will be lost.

So the decision to buy a X670 mainboard in May 2023 was not that worse. I ignored on purpose those X670E or X650E mainboards. 50€ saved for a higher priced mainboard for a feature with really no use for myself.

I assume that 5090 will be available for another two years.

Except a graphic card I have no idea what else I may ever use for a non existing PCIE 5.0 x 16 lanes slot.

--

Interesting scenario would be a Ryzen 5800X3d or 5700X3d with a X470 cheapo mainboard. That should have afaik PCIE 3.0 x 16 electrical lanes on the graphic card.

 

[Akachi86]

How to test lower PCIEX generations with same motherboard? I couldn't read if it was already written.

Most motherboards should have the option to limit the speed of PCIe in the bios/uefi.

Also, nice to see there's still no need to upgrade my motherboard which sports PCIe 4.0.

 

[b1k3rdude]

I think this testing methodology will only have more meat to it once more PCIe 5.0 capable card are released.

 

[sLowEnd]

Seems to do pretty well, even with low bandwidth. Good news for people planning to stick this in an external GPU enclosure, I guess

 

[csendesmark]

Awesome to know that the 5090 will still perform great with my Core2duo E8500 on PCIe 1, can't be having any bottlenecks )

 

[lexluthermiester]

View attachment 381300

It would be a predictable slide show for anything modern.

 

[csendesmark]

It would be a predictable slide show for anything modern.

I disagree,
It would be like .5~.3s nice smooth animation then a massive stall for about the same time, changing back and forth.
I did a similar "joke-test" when I used to work in a computershop with a GeForce GTX280 or 480 and some low end first gen intel LGA775 i3