R610 memory confusion

Question

Well, apparently this ML doesn't like pastes, and I don't feel like re-typing. Straight to the point then:

I've got 4 sticks of Dell A5184178. 16GB PC3-10600 DDR3-1333 Low Voltage Dual Rank ECC CL-9 etc.

Thinking I'd get 64GB at 1333 Mhz, but on boot only says 64GB 800 MHz, any memory config I try. How do I get 64GB at 1333MHZ?

theflash1932 · Answer

If you are using two quad-rank DIMMs per channel, the memory speed will be limited to 800MHz. If using two dual-rank DIMMs per channel, the memory speed will be limited to 1067MHz. 1333MHz can only be achieved on this generation of Intel processors using one dual-rank DIMM per channel.

"ML"?

DELL-Manfred W · Answer

Hi mlpscadaJust in case you need a reference, check out this manual on Page 116:-ftp://ftp.dell.com/Manuals/all-products/esuprt_ser_stor_net/esuprt_poweredge/poweredge-r610_Owner%27s%20Manual2_en-us.pdf Hope this helps.

mlpscada · Answer

Thanks for the page reference. These are not quad ranked, so I can dismiss that.

If I'm reading the table that starts on page 118 correctly, will putting the memory sticks in slots A1,A4,B1,B4 result in the most optimal memory placement?

mlpscada · Answer

'ML' (Mailing List) should have been 'forum', apologies. These aren't quad ranked, so I can dismiss that consideration. Is a 'channel' the 'A' and 'B' designators, or the '1','2','3' etc designators? Thanks

DELL-Manfred W · Answer

Hi mlpscada

Yes, you are correct. For 2x CPUs, for Optimzer memory mode, for 4x memories, you need to populate A1, A4, B1, B4 for single channel.

There are 3 channels for each CPU

A1, A4 = channel 2

A2, A5 = channel 1

A3, A6 = channel 0

Hope this helps.

PowerEdge Hardware General

R610 memory confusion

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