upgrading RAM for the 1st time, a few questions

[da_mic_1530]

sorry to noob up this tech forum but just want a few questions answered before I hit the buy button

I have the following motherboard ;

Chipset VIA KM400A + VT8237
Memory 2 x DDR400 slots
200W power supply

I wish to add
http://www.overclockers.co.uk/showproduct.php?prodid=MY-006-OK&groupid=701&catid=8&subcat=481

1. Will the Ram work
2. Is it just plug and play?
3. Will I notice a large increase in peformance (background detail below)

Cheers


basically I'm running XP on the following system

AMD 2Ghz (Roughly)
512mb Ram (2 x 256mb sticks)
ATI radeon 9000 128mb AGP

the rest is irrelevant

Anyway this pc is mostly used as a media centre outputting on a 27inch HD TV, as you can imagine the above spec does not handle this very well, but does a passable job, though I would like to add some new RAM to boost the performance

 

[da_mic_1530]

yeah would I be better going for a stick of 1 gig ram, then upgrading to 2 if and when i need it (would only lose £5 when not buying them together)

As for the gfx card, it runs suprisingly well actually, can play call of duty 1, sim city 4, half life 2 etc all on the tv, don't know what resolutions but it looks great, not that it's used much for gaming

As standard web browsing and dvd stuff its great, and no fan so it's silent