Question about PC Chips A21G Motherboard
This motherboard has the memory dual channel feature and only has 2 memory slots. Right now I am using just one with 521 but I can not start the system. Should I use the 2 slots with the same size memory?
Hi, Your system would run better with 2 equal RAM chips but will also run well enough on one. the main reason for a system not to boot is that the Ram is not fitted properly or in the Wrong dimm slot. Use a torch and see which slot is marked as dimm1, this is usualy the one nearest the CPU.
If this does not work then test the RAM in another computer, it may be faulty.
Posted on Nov 17, 2007
Yes use 2 memory
Posted on Nov 17, 2007
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Posted on Jan 02, 2017
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Aug 10, 2011 | Intel D915GLVG Motherboard
Jun 02, 2011 | Gigabyte GA-8I915P Duo Pro Motherboard
You can install 128 MB, 256 MB, 512 MB, and 1GB DDR SDRAM DIMMs into the DIMM sockets using the memory configurations in this section.
• Install only identical (the same type and size) DDR DIMM pairs
using the recommended configurations.
• Make sure that the memory frequency matches the CPU FSB
(Front Side Bus). Refer to the Memory frequency/CPU FSB
synchronization table on the next page.
• This motherboard does not support double-sided 16-bit DDR DIMMs.
• Do not create a three-DIMM configuration in dual-channel mode. The
third DIMM is ignored in the dual-channel operation.
Recommended memory configurations
Memory frequency/CPU FSB synchronization
* Use only identical DDR DIMM pairs.
Mode DIMM1 DIMM2 DIMM3 DIMM4
Single-channel (1) Installed - - -
(2) - Installed - -
(3) - - Installed -
(4) - - - Installed
Dual-channel* (1) Installed - Installed -
(2) - Installed - Installed
(3) Installed Installed Installed Installed
CPU FSB DDR DIMM Type Memory Frequency
800 MHz PC3200 400 MHz
533 MHz PC3200/PC2700 400/333 MHz
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