Yeah, we need to find out waht you got and waht you need it for then we can give you the best spec for your money
However, if you wanted to get new ram id go for this spec..
REFERENCE DESCRIPTION QUANTITY PRICE COST REMOVE
CP-165-AM AMD Athlon 64 3800+ 2.4GHz (Socket AM2) - Retail (CP-165-AM)
£69.95 £69.95
MB-147-AS Asus M2N-E (Socket AM2) PCI-Express DDR2 Motherboard (MB-147-AS)
£59.95 £59.95
MY-038-CR Crucial 1GB DDR PC2700 CAS2.5 Dual Channel Kit (CT2KIT6464Z335) (2x512MB) (MY-038-CR)
£54.95 £54.95
HD-024-SA Samsung SpinPoint P HD160JJ 160GB SATA-II 8MB Cache - OEM (HD-024-SA)
£34.95 £34.95
CD-020-AS Asus DRW-1608P3S 16x16 DVD±RW Dual Layer ReWriter (Black) - Retail (CD-020-AS)
£24.50 £24.50
CA-009-HP Hiper HPU-4M580 Type R 580W ATX2.2 PSU - Black (CA-009-HP)
£44.95 £44.95
GX-095-AS Asus ATI Radeon EAX-X1300 Pro-TD 256MB DDR2 AVIVO TV-Out/DVI (PCI-Express) - Retail (GX-095-AS)