hvilken ram skal jeg bruge

hvilken ddr ram skal jeg bruge til dette cpu og bundkort??
pc 2100/2700/eller 3200

CPU
2.53 GHz 
CPUID String 0F24h 
Package Type 478 pin  Core Voltage 1.530 
Bus Speed 533 MHz  Thermal Guideline 59.3W 
Core Stepping B0  Thermal Spec 71°C 
L2 Cache Size 512 KB  Manufacturing Technology
0.13 micron  L2 Cache Speed
2.53 GHz  Bus/Core Ratio 19 

bundkort
ASUS P4V800D x
Only VGA solution for AGP8X and PCI-E
Intel FSB800 and Hyper-Threading Technology
Dual-Channel DDR400
AGP8X/PCI-E Dual-VGA interface Support
RAID 0,1,JBOD
Serial ATA
10/100 Ethernet
8 Port USB 2.0