Yes the Gigabyte UD3R it just have 1 PCI Express 2.0 x16 slot.
Let me tell you that I tried the Intel Core 2 Duo E8500 Wolfdale 3.16GHz on two mobos: Gigabyte UD3R and MSI P6N SLI Platinum and the performance of the processor on the MSI is way better, u can notice the performance at once, you don't have to run a lot of tests to compare and see the difference, I did not like the Gigabyte UD3R, for now on I will stick to MSI or ASUS mobos.