Microsoft has confirmed upper hardware limits for XP set out as follows 1 Main storage Max built in flash drive of 16 GB and or a hard drive of no more than 160 GB 2 Graphics No greater than DirectX 9 0 capability 3 Main memory No greater than 1 GB 4 CPU has to be single core and no more than 1 GHz unless it s one of the following Intel Atom N270 N230 Z500 Z510 Z520 Z530 Z540 or Intel Celeron 220 or AMD Geode LX Athlon 2650e Sempron 210U or VIA C7 M ULV Neon U2300 U2400 and U2500 CPU 5 Screen size NetBook Up to 10 2 inches Large screen NetBook Up to 14 1 inches NetTop No limit given From ITExaminer 12 May