Need some advice

I am rebuilding my pc after about 4yrs and did some research but i have a couple of questions. Also would like a few suggestions.
I already purchased the following

Mother Board: Gigabyte S-series EX38-DS4
Processor: Intel core 2 Duo 3.0 45nm Wolfdale
Video card: Gigabyte GeForce 8800GT

My question is the ram that this board can take is DDR2 1200 PC2 9600 and there seems that not to many manufactures make this speed Patriot has it in extream and Viper Does anyone if it will work with this board and what suggestions for ram for this board

My second question is about Hdd I am looking at a Seagate Barracuda ES.2 ST3250310NS 250GB 7200 RPM 32MB Cache SATA 3.0Gb/s Hard Drive - OEM on Newegg for about $80 each right now i have 2 120 gig seagates in my system running raid 0. Not that i have important data and space isn't a problem right now. What would be better running 3 of these drives as a raid 5 or just getting maybe 2 es.2 500 gig drives 1 for data and 1 for backup Price for the 500 gig is about $132 each

Thanks for your help

 

The EX38-DS4 is certified to run 1200mhz speed memory.
You may experience problems with overclocking (if you're into that) with those components, but they're so fast to start with, there's no real point. Those hard drives are expensive for their size, and RAID5 is only really necessary if you want a lot of redundant storage. I'd go for one or two of these, they're excellent drives:
http://www.newegg.com/Product/Product.aspx?Item=N82E16822136073&Tpk=WD5000AAKS

 

Those drives are made for servers and for speed thats why they are expensive. I also am worried about power issues i have an emermax 600 watt power supply. Was going to get 4 gigs of ram

 

Lol no seriously, the WD drive will be within a couple of percent of the speed. Hard drives just don't vary in speed that much, not S-ATA ones anyway. As for server-grade performance, Seagate drives are certainly reliable, but I use those exact WD drives in a server and have had great success with them. Your PSU will be more than up to the task of those components.

 

Does the difference in the cache matter because the Segate is 32 and WD is 16

 

Not really, no. 16MB is much better than 8MB, but 32 vs 16, there isn't much of a difference.

 

I just realized that my power supply does not have the hookups for power to my new video card my old ati 800 pro uses a modular connector can any one recommend a new power supply eventually want to get a second card and us sli I like entermax looked at the 1000 watt galaxy on newegg but someone said it was not sli

 

You don't need an Enermax Galaxy, get one of these, they're superb:
Trust me 620W is plenty.
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139002