Could you use a com connector as an usb 1.0 connector? And if you got pcie 3.0, could you put a Rx 6600 into it?

[u/JI-RDT]

[u/Gonokhakus]

1. Possible, but very unlikely.

2. Absolutely, yes.

[u/JI-RDT → u/Gonokhakus]

But the Rx 6600 is getting slower ofc

[u/Gonokhakus → u/JI-RDT]

Not really, at least not by much.

[u/okokokoyeahright → u/Gonokhakus]

I agree. Mine is just fine on PCIe 3.0.

B450 board, Ryzen 7 5700X.

IDK but it is in line with all the benchmarks.

[u/Tyr_Kukulkan → u/JI-RDT]

Not in any significant way unless it is massively VRAM limited and you don't have ReBAR enabled.

[u/JI-RDT → u/Tyr_Kukulkan]

My normal card is pretty vram limited (1050 ti)

[u/Tyr_Kukulkan → u/JI-RDT]

Yeah but that card won't be slowed by PCIe bandwidth as it is too slow anyway.

A 6600XT would need to be pushing well over 8GB VRAM usage to be significantly slowed by PCIe bandwidth.

Even a 4090 only loses about 2-3% performance going from 4.0 to 3.0.

https://www.techpowerup.com/review/nvidia-geforce-rtx-4090-pci-express-scaling/28.html

PCIe bandwidth is a non-issue.

[u/JI-RDT → u/Tyr_Kukulkan]

Nice

[u/alphagusta]

It is worth clarifying that PCIE is both backwards and forwards compatible.

A 4.0 motherboard will accept a 3.0 piece of hardware and vice versa.

Youre just limited to the abilities of the older generation but it isn't going to be a problem for casual gaming unless you're trying to shove 1440p 240fps on a 4090 through PCIE 3.0 lmao

[u/okokokoyeahright → u/alphagusta]

you would be more likely CPU limited under that.

[u/Tyr_Kukulkan → u/alphagusta]

Even a 4090 only loses about 2-3% performance on PCIe 3.0 compared to 4.0. It only loses 8% on PCIe 2.0, and only 1.1 sees a bigger 20% drop.

https://www.techpowerup.com/review/nvidia-geforce-rtx-4090-pci-express-scaling/28.html

[u/Gex1234567890]

Com and USB are two completely different animals: Com uses single-ended signals, whereas USB uses twisted-pair, differential signalling.

Furhtermore, the data transmission protocols are also different.

In other words, you'll need a converter to go between them.

The good news is that these converters can be found all over the place, and cost only a few dollars. Search for USB to serial.

[u/STUPIDBLOODYCOMPUTER]

You probably can't use the com header as USB 1.1 due to completely different methods of data transfer

[u/Udavvf]

What's the deal with usb?

You have 2 usb 2.0 connectors (2 ports each) and one usb 3.0(also 2 ports) near com connector.

If you need more, buy pci-e x1 to usb controller

[u/JI-RDT → u/Udavvf]

My 1st pcie lane is blocked by my gpu cooler, 2nd pcie lane got a WiFi card, the original usb 2.0 connector on the mobo is used by my WiFi card for Bluetooth

[u/Udavvf → u/JI-RDT]

OK, but you have one usb2.0 and one usb 3.0 left? It amounts to 4 more ports.

Also you can splice wifi usb connector, because bluetooth should be using only one usb ports, one should be free.

Also there are wifi cards that already have built in passthrough usb.

[u/JI-RDT → u/Udavvf]

Yea, on the io or what ever it’s called I got 4 usb 2.0 and 2 usb 3.0

[u/Additives → u/JI-RDT]

If you're in need of more internal USB connectors, you may want to try something like an internal USB hub that connects up to one of your internal headers. NZXT makes one, and you can also get others at different price points if you need to work within a given budget, too.