Dell R810 server with Flexmem Bridge Tech

[mab1376]

http://www.anandtech.com/show/3648/xeon-7500-dell-r810/5

I'm trying to see if getting this server with 2 CPU's instead of 4 will have a major impact on memory performance since by using the Flexmem bridge you are loosing 4 memory controllers which would normally be built into the x7560 CPU's I'm looking to get.

It makes sense that it would, but I cant find anything definitive. I'm going to be using this for HyperV visualization.

I would be maxing out the RAM at 512GB.

 

[Disparia]

Your situation would not be better served with 2 or 3 2P boxes with maxed or near-maxed memory? Going to assume that you've already picked an R810 for a reason and will get on with the answer

I'd say you'd be fine, as the number of controllers is appropriate to the number of CPU's installed.

This may help:
http://www.dell.com/downloads/global/products/pedge/en/poweredge-server-11gen-whitepaper-en.pdf

On break at work, only skimmed it, but looks like it has some good information on the bridge.

 

[mab1376]

Reading a bit further I found that it seems the way the board is designed knocks each proc down to 1 MC each.

I'm trying to pick between this R810/R910 or the HP Proliant DL580 G7.

 

[JF-AMD]

Why not an R815 with Opteron? You could put 4 Opteron processors in with the same memory footprint as an R810 with only 2 memory procs. At a lower price. With 4 memory channels per processor. Also, because they have they have the memory buffers, there are extra latency steps.

Look into it.

Dual x7560, 16 total cores @ 2.26GHz, 512GB memory $47.1K (USD) with all base options
Quad Opteron 6174, 48 total cores @ 2.2GHz, 512GB memory $42.7K (USD) with all base options

Save more than 10%, get 3X the cores and faster memory throughput, sounds like a good deal to me.

 

[yogurt_21]

we use r710's at work and ship them as media appliances for a dual cpu option they're not that bad.

but if you're truly going for a 512gb server it's best to work this out with a rep rather than a forum, especially one that tends to lean more consumer than server.

I can tell you that the r710's as configured with 12gb mem through dell's website are $5k, through our rep they're $3k.

now i don't know if a 40+K server could offer a 40% savings through a rep, but it's definetly worth the time to check, especially if this isn't the last server you're going to be building.