D915PDT motherboard graphics card upgrade problem, expert in!

Question 1:. Will these two graphics cards work on this motherboard? Are there any compatibility issues? If it works, will it affect the performance of the graphics card?

You can use 2.0 versus 1.0 only to increase the transmission bandwidth and strengthen the graphics card power supply, for the high-end graphics cards have a greater impact, for the 5670 this level of graphics cards do not have much impact, you can not feel it

Question 2: Which of these two graphics cards is more appropriate point? I've heard that the 5670 is better than the GT240 in terms of performance, right?

By all accounts, the 5670 is better than the GT240 in most applications

Question 3: If I upgrade my motherboard, will these cards work on my new motherboard?

Of course you can, as long as the motherboard has a PIC-E graphics slot

Question 4: Also, how do you tell the difference between a Sapphire HD5670 512M GDDR5 Extreme Edition 3 and a Sapphire HD5670 512M GDDR5 Extreme Edition 2?

Generation 2:

Core frequency 700MHz

Memory frequency 4000MHz

Generation 3:

Core frequency 850MHz

Memory frequency 5000MHz