PCI-e SATA Controllers

M2N78-LA (Violet 6) motherboard 64 bit
16 GB DDR3 memory
AMD Phenom II X4 logo quadcore 2.8 GHz
1 TB SSD
4TB Hybrid SSD/HDD
Windows 7 Home Premium
Corsair 300R case
Corsair 750M power supply

I think my onboard SATA controller is messed up so I want to try some PCI-e SATA controllers.:

https://www.newegg.com/Product/Product.aspx?Item=15-150-095

How can I tell whether I have PCI-e 1.0 or 2.0?
Would the peripheral bus disk speeds be any faster or slower than the SATA bus?

(This is a tl;dr of this thread:
http://www.tomshardware.com/answers/id-3523587/motherboard-broken-sata.html)
Reply to mesapegasus
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