this motherboard supports only PCI E 1.1, but 2.0 and 3.0 are supposed to work with 1.1 motherboards.
many of the lower priced AM3 boads used the old Nvidia chipset, dating back to the 754/939 days, it has suffered some minor upgrades and name changes, but still pretty much the same old nforce 6100 + 430 or 410, even if it's called 7025/630 (still 7025, the IGP is from the geforce 6-7 era, should give you a clue about how old it is), so the features are what you would expect back in 2005... PCIE 1.1, HT1000MHz (optimized for AMD K8 s939/am2), but since HT kept compatibility and the memory controller is on the CPU, it can work fine, even with a FX 8350...