[font=“Arial”]I really wanted to simplify my CUDA testing and since I had two spare PCIe x1 slots in my workstation I modified two older cards to fit.
A Dremel tool, safety glasses and a steady hand were required. The low-end cards are now x1 devices.
Now I can test against most compute capabilities without using another machine or swapping cards. No 1.0 or 1.3 but 1.1 and 1.2 are close enough to those compute capabilities.
Here are some bandwidth numbers in MB/sec:
gpu pcie sm_cc h>d d>h device
------- ------- ----- ---- ---- ------
GTX 680 2.0 x8 3.0 2628 3250 155331
GTX 480 2.0 x8 2.0 2638 3277 147911
GT 545 2.0 x8 2.1 2642 3201 35650
GT 240 1.1 x1 1.2 165 205 21224
9400 GT 1.1 x1 1.1 165 205 7083
The last two GPUs are in the PCIe 1.1 x1 slots so those numbers aren’t a surprise.
I haven’t smelled any smoke yet! External Image[/font]