MiniPCIe riser

[NecroFlex]

So i'm goofing around and making a small portable gaming pc...sorta. I found a tiny mobo with an i5-4300u on it, it's powered by an external brick and has 2 mPCIe slots (one's half size, the other full size, which also supports mSATA).

So it got me thinking, i know mPCIe risers exist and i know an mPCIe is running at x1 speed (so here it would be limited to 500MBs), which is a bottleneck, but i'm not planning to put anything other than a GT 1030 in there, which is going to be slightly bottlenecked by the 2.0 x1 limit, but should still perform ok.

Problem is, most mPCIe risers i find use USB 3.0 to transfer data, my question now is...how big of a bottleneck will that be? Will it be able to transfer the 500MBs or will it cap out at lower rates, making it unusable?

Was looking at this: https://www.ebay.com/itm/Mini-PCI-E-Express-1X-to-16X-PCI-E-Riser-Card-Adapter-with-50cm-USB-Cable-AC1327/312755767694?hash=item48d1b2498e:g:8pcAAOSwL31dHehn

 

Thanks for the help!