If it doesn't show in using your computer then don't worry about it.
It shows my PCI-e 2.0 x4 slot as a PCI-e 1.1 x4 slot in GPU-Z.
It also sometimes shows just AMD K10 for the processor in CPU-Z.
alot of times some things are off, only worry about it if you notice it affecting your computer.
I'm playing Saints row 3 and with everything High/2xMSAA I get like 60% gpu usage and 30-40ish fps (unless im looking at the ground or small area).
Now, I thought this was a CPU bottleneck but my CPU is only being used at 60-70%.
Someone even did a benchmark with an i5 2500k with only 2...