H87M-E User's Manual
Page 15
... total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is recommended to protect the CPU. Use a maximum of 3GB system memory if you are using a 32-bit Windows® OS. - Install a 64-bit Windows® OS ...motherboard, the actual usable memory for the OS can be about 3GB or less. For optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from a DDR or DDR2 module. ASUS H87M-E 1-7 For effective use of memory, we recommend that you do any of the following: ...
... total size of the lower-sized channel for the dual-channel configuration. Any excess memory from the higher-sized channel is recommended to protect the CPU. Use a maximum of 3GB system memory if you are using a 32-bit Windows® OS. - Install a 64-bit Windows® OS ...motherboard, the actual usable memory for the OS can be about 3GB or less. For optimal compatibility, we recommend that you install memory modules of the same version or date code (D/C) from a DDR or DDR2 module. ASUS H87M-E 1-7 For effective use of memory, we recommend that you do any of the following: ...