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We are planning to buy two different servers from HP. They will be used in project where we do lot of statistical analysis and Java development/testing etc. Servers are :

a) Part :ML350e 2403 CTO Model : HP ProLiant ML350e Gen8

b)Part No. 737650-375 Model : HP ProLiant ML10

RAM Models considered as per availability : a) 8GB Single Module Part No : 647897-b21
b) 16 GB Single Module Part NO: 647901-b21
(I believe both are registered ones)

Operating system: Testing Phase 1: Windows Server 2008 Testing Phase 2 : Centos (whichever latest ed. available)

Should we go for Registered type or Unregistered?

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How much RAM will you need? –  ewwhite Jan 28 at 13:41

2 Answers 2

up vote 3 down vote accepted

For your platform, the difference between UDIMMs and RDIMMs is price (lower), performance (lower) and maximum capacity (lower). Both UDIMMs and RDIMMs are supported just fine, but cannot be mixed.

Maximum (RDIMM) 192 GB (12 x 16 GB) RDIMM
Maximum (UDIMM) 96 GB (12 x 8 GB) UDIMM

Given a choice, I don't buy UDIMMs unless I know the system will have low RAM requirements. It really comes down to knowing there are more restrictions on UDIMMs and that I'd be making a compromise. The gap between them has narrowed in the current generation of servers, so both seem to be options.

I would strongly suggest that you give the ML350p Gen8 a look, though. The HP Dynamic Smart Array included on the lower-end ML350e Gen8 servers will cause you trouble in the long-run, especially if you intend to use this system with Linux.

See:

What "PAL Shim AllocRequest returning NULL" meens?

Installing Ubuntu 12.04 on HP Proliant DL380e with 1TB SAS Drive

Install Oracle Linux 6.4 on HP ProLiant DL380e Gen8 server

Poor SQL performance on HP ProLiant ML310e Gen8 v2 with raid10

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Go with registered memory, anything else is a compromise, plus that model can only take 96GB of UDIMMs whereas it can take double that of RDIMMs.

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