Asus P5SD2-A - Manual (Page 13)

• You may install varying memory sizes in Channel A and Channel B. The system maps
the total size of the lower-sized channel for the dual-channel configuration. Any excess
memory from the higher-sized channel is then mapped for single-channel operation.
• Always install DIMMs with the same CAS latency. For optimum compatibility, we
recommend that you obtain memory modules from the same vendor.
• Due to the memory address limitation on 32-bit Windows OS, when you install 4GB
or more memory on the motherboard, the actual usable memory for the OS can be
about 3GB or less. For effective use of memory, we recommend that you install a 64-bit
Windows OS when having 4GB or more memory installed on the motherboard.
• Some old-version DDR2-667 DIMMs may not match Intel ® ’s On-Die-Termination (ODT)
requirement and will automatically downgrade to run at DDR2-533. If this happens,
contact your memory vendor to check the ODT value.
• Due to chipset limitation, DDR2-667 with CL=3 will be downgraded to run at DDR2-533
by default setting. If you want to operate with lower latency, adjust the memory timing
manually. There will be 4MB reduction in total memory when enabling ASUS Thermostat
function under Single Channel mode.
Qualified Vendors Lists (QVL)
DDR2 667 Qualified Vendors List
(continued on the next page)
Size Vendor Model Brand SS/DS Part NO.
DIMM support
A* B*
256MB Kingston KVR667D2N5/256 Elpida SS E2508AB-6E-E • •
256MB Kingston KVR667D2N5/256 Kingston SS D3216TLSAKL3U • •
256MB Kingston KVR667D2N5/256 Infineon SS HYB18T256800AF3SW65 33154 • •
512MB Kingston KVR667D2N5/512 Kingston SS D6408TE8WL-27 • •
512MB Kingston KVR667D2N5/512 Elpida SS E5108AGBG-6E-E • •
1G Kingston KVR667D2N5/1G Kingston DS D6408TE8WL-3 • •
1G Kingston KVR667D2N5/1G Kingston DS D6408TEBGGL3U • •
1G Kingston KVR667D2N5/1G Elpida DS E5108AGBG-6E-E • •
512MB Samsung KR M378T6553CZ0-CE6 Samsung SS K4T51083QC • •
512MB Samsung KR M378T6453FZ0-CE6 Samsung DS K4T56083QF-ZCE6 • •
512MB Samsung M378T6553CZ3-CE6 Samsung SS K4T51083QC-ZCE6 • •
1G Samsung M378T2953CZ3-CE6 Samsung DS K4T51083QC-ZCE6 • •
1G Samsung KR M378T2953CZ0-CE6 Samsung DS K4T51083QC-ZCE6 • •
256MB Qimonda HYS64T32000HU-3S-A Qimonda SS HYB18T512160AF-3SSSS17310 • •
512MB Qimonda HYS64T32000HU-3S-A Qimonda SS HYB18T5128000AF-3SSSS27416 • •
512MB Qimonda HYS64T64000HU-3S-A Qimonda SS HYB18T512800AF3SFSS05346 • •
1G Qimonda HYS64T128020HU-3S-A Qimonda DS HYB18T512800AF3SSSS28104 • •
512MB Corsair VS512MB667D2 Corsair SS 64M8CFEGPS0900647 • •
512MB Corsair VS512MB667D2 Corsair DS MIII0052532M8CEC • •
1G Corsair VS1GB667D2 Corsair DS MID095D62864M8CEC • •
1G Corsair XMS2-5400 Corsair DS Heat-Sink Package • •
256MB HY HYMP532U64CP6-Y5 AB Hynix SS HY5PS121621CFP-Y5 • •
512MB HY HYMP564U64AP8-Y4 AA Hynix SS HY5PS12821AFP-Y4 • •
512MB HY HYMP564U64AP8-Y5 AA Hynix SS HY5PS12821AFP-Y5 • •
1G HY HYMP512U64AP8-Y5 AB Hynix DS HY5PS12821AFP-Y5 • •
1G HY HYMP512U64CP8-Y5 AB Hynix DS HY5PS12521CFP-Y5 • •
512MB Kingmax KLCC28F-A8EB5 Elpida SS E5108AE-6E-E • •
512MB Kingmax KLCC28F-A8KB5 Kingmax SS KKEA88B4LAUG-29DX • •
1G Kingmax KLCD48F-A8KB5 Kingmax DS KKEA88B4LAUG-29DX • •
Chapter 1: Product introduction 1-4