Folding Forum

A friend of mine has a motherboard with one available PCIEx 2.0 slot with a transfer rate of 4x.

I sent him a Nvidia GTX 1650 Non Super no power connector to use it for folding.

According to the manufacturer the card is a PCIEx 3.0 16x card. The physical PCIEx 2.0 slot fits the card, the only issue that worries me is the fact that the transfer rate for that slot is 4x.

When I tested the card in a PCIEx 3.0 slot 16x/8x physical form and 16x/8x transfer rate, the card was using ~25% of the bandwidth available (GPUZ).

After checking the PCIEx specifications from Wikipedia:

PCIEx 3.0 slot with 1x transfer rate = 985 MB/s

PCIEx 3.0 slot with 8x transfer rate= 7880 MB/s

25% of 7880 MB/s = 1970 MB/s


PCIEx 2.0 slot with 1x transfer rate = 500 MB/s

PCIEx 2..0 slot with 4x transfer rate = 2000 MB/s

Theoretically that should be enough. What do you think?

Has anyone tested a Nvidia GTX 1650 Non Super no power connector on a PCIEx 2.0 with 4x transfer rate slot?

On Windows it may bottleneck a little but on Linux that is no problem.

Thank you for your reply foldy.

I am afraid that this will be used in Windows along with a Nvidia GTX 1660 TI that is placed in the main PCIEx motherboard slot.

Do you have an estimation for the bottleneck value? 5%, 10%, 15%?