External Graphics Card for Laptop
View Single Post
Join Date: Dec 2007
01-05-2011, 10:25 AM
Originally Posted by
This ViDo looks good in theory. But I fear that the USB 2.0 bandwith (~50MByte/s) is too low. The PCIe has a bandwith of ~500 MByte/s. If you need to copy a moderate amount of textures, around 400 MByte into the GPU's memory then you have a massive lag (8 sec instead of 0,8 sec).
USB 3.0 will not have that bottleneck, but USB 2.0 does at the moment.
The dock uses an Expresscard card to connect to the laptop. Expresscard does support PCIe connection speeds. That being said, you will still get come performance degradation when using something like this.