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ASUS Crosshair II Formula 2-15
2.4.2 Memory congurations
You may install 256 MB, 512 MB, 1 GB, and 2 GB unbuffered ECC/non-ECC
DDR2 DIMMs into the DIMM sockets.
Recommended Memory Congurations
mapped for single-channel operation.
• Always install DIMMs with the same CAS latency. For optimum compatibility,
it is recommended that you obtain memory modules from the same vendor.
than 3GB because the address space is reserved for other critical functions.
This limitation appears on Windows
®
XP/Vista 32-bit operation system which
does not support Physical Address Extension (PAE).
• If you install Windows
®
XP/Vista 32-bit operation system, a total memory of
less than 3GB is recommended.
• This motherboard does not support memory modules made up of 128 Mb
chips.
Notes on memory limitations
• Due to chipset limitation, this motherboard can only support up to 8 GB on
the operating systems listed below. You may install a maximum of 2 GB
DIMMs on each slot.
Mode
Sockets
DIMM_A1 DIMM_A2 DIMM_B1 DIMM_B2
Single-Channel
Populated – – –
– – Populated –
Dual-channel (1)
Populated – Populated –
Dual-channel (2)
Populated Populated Populated Populated
64-bit
Windows
®
XP Professional x64 Edition
Windows
®
Vista x64 Edition