It will work fine. That is Elpida RAM. Companies like Corsair and GSkill don't actually make any products they just rebrand. Elpida is a major manufacturer. So you might very well get these same modules with a Corsair name brand on them.
Not sure what the P in 6400P signifies. The VLP is very low profile. CL6 is cas latency 6. It's not performance memory but you will never know the difference. High end DDR2 800 had a cas of 4.
I am a total idiot and I truly apologize. I just reread the specs on that RAM and it's ECC RAM. ECC RAM is designed for servers and will not work in desktop motherboards. I only read the headline and looked at the picture on the ebay page and it does not mention being ECC. It does say it later in the listing though. So I should have read the whole thing but the seller should have listed it as ECC in the headline.
Actually ECC is generally more expensive than non ECC. DDR2 is just expensive now that it is pretty much obsolete.
Once again sorry about that. First time in the over 4 years I have been posting here that I have goofed like that. At least that I know about! Today is my first day as a moderator too. Guess I started out with a bang! The wrong kind of bang but a bang never the less.