Gigabyte RAM

[roveto]

Hello, has any body figured out which 2 or more DIMM slots are used to get Dual channel function on the Gigabyte model GA-&BESH-RH (or-F2 rev) model I realize this is a socket 711 and a server MB and is 4 yrs old but the documentation is terrible and that model # comes up with 0 results on the GB site and the Tom's hardware site both. I just got 2x4 KST FB ECC for it and I have 4x1 KST FB ECC in there now. The smaller sticks just seem to reduce the speed. rated at 667 but should be 1333 at Dual function. also any other successful info on this board would be appreciated. Xeon 5140 dual core single, raid 5 with 3x40gb raptors. sata DVD burner lite-on, built in Dual NIC and Display and no other add ons. win2000 server shows 3.4GB ram as expected. Win7 64 bit showed all 12. got 12 with 4gb in A1, B1 and the 1gbs at C1,C2,D1,D2 but surely no dual channel that way... who knows? Manuel(sic),no help. probably 2x4gb in A1 and A2 way to go and park the other 4 sticks.

 

[jaquith]

Assuming GA-7BESH-RH (rev. 2.1) - http://www.gigabyte.us/products/product-page.aspx?pid=2643#sp

Supported:
- 8 x 240-pin DIMM sockets ; DDR2
- Supports up to 32GB 533/667 memory
- 4 Channel memory bus
- Fully Buffered DIMM (FBD) 533/667MHz
- Support 512MB, 1GB, 2GB and 4GB memory
- Single-bit Errors Correction, Multiple-bit Errors Detection ; ECC Fully Buffered
* 1.80v

The X7DBE-X SuperMicro is a similar MOBO - http://www.supermicro.com/products/motherboard/Xeon1333/5000P/X7DBE-X.cfm and the documentation is clear for DIMM installation. See 2-6 - http://www.supermicro.com/manuals/motherboard/5000P/MNL-0869.pdf

 

[roveto]

Best answer selected by roveto.

 

[roveto]

Thanks, there is a somewhat complicated interleaving sequence necessary to get the dual channel effect. The Super-micro has a setting of 1:1 1:2 or 1:4 (default), which I don't think the Gigabyte has, but I'll try the following sequence and see what I get.

1G 4G 1G 4G 1G XX 1G XX this puts the larger ram in back though, so I wonder if
4G 1G 4G 1G XX 1G XX 1G would work as well.

 

[jaquith]

The problem is ALL the Channels must be the SAME SIZE. The simplest is to get (2) more MATCHING '4G' 4GB sticks. 4G 1G 4G 1G 4G 1G 4G 1G

"Populating DIMM modules with pairs of memory
modules of the same size and same type will result in Interleaved Memory which
will increase memory performance."