How much memory is 2gb?

Can i install Kingston ValueRam 4Gb Kit 2x 2Gb DDR2 800MHz RAM Memory to my PC and how much RAM will i have?

• 1 x 600 watt ATX power supply Tagan TG600-U33 2FORCE-ll SERIES 1 x Corsair TWIN2X2048-6400C4 2GB (2x XMS2 1GB) Twin2X PC-6400 DDR2 RAM, 2x240-pin DIMMs, Non ECC Unbuff 1 x Enermax Uber Chakra case ECA5001-B with two Blue LED fans (25cm + 12cm), No PSU 1 x Galaxy GF 9800GTX+ PCI-E 2.0 512MB DDR3 256-bit, 738/2200MHz, Dual-Link DVI, HDTV, HDCP, SLI Ready, 1 x Gigabyte S775, GA-EP45-UD3P, P45, 1600 MHz, DDR2 1366+, PCI-E(CrossFireX), eSATA/Raid10/2Glan 1 x Intel CORE 2 DUO E8400/3.00GHz/6MB CACHE/1333FSB/LGA775/45NM 1 x Internal SATA, Seagate Barracuda, 1000GB, 3Gb/s 32MB 7200.11, ST31000333AS 1 x Pioneer DVD Burner, DVR-216BK, SATA Interface, Black, 10x/20x Dual/Single OEM And how do u think Crysis will ran at the highest settings with the added RAM included. :)

• Answer:

  what OS are running? XP will only see 3.25 gigs .. Vista needs to be 64-bit to see all 6GBs when you add the 4GBs to your motherboard.. the board itself will hold 16GBs of memory 4 x 1.8V DDR2 DIMM sockets supporting up to 16 GB of system memory Dual channel memory architecture Support for DDR2 1366+*/1066/800/667 MHz memory modules make sure you put them in the right slots to put it in dual channel mode.