Tag Archives: cloud computing

Memory options for the IBM System x3650 M4 server – 32GB memory modules

For 32GB memory modules – the problem with 32GB RDIMMs

32GB RDIMM will only be available in 4-rank (4-rank).

Continue reading

3 Comments

Filed under Uncategorized

Memory options for the IBM System x3650 M4 server – 16GB memory modules

For 16GB memory modules use at 1 DPC and 2 DPC

If the memory you need is going to require 1 DPC, or 2 DPC, you are better off buying the IBM RDIMMs.

Continue reading

4 Comments

Filed under Uncategorized

Memory options for the HP DL360p and DL380p servers – 32GB memory modules

For 32GB memory modules – the problem with 32GB RDIMMs

Currently HP does not list a 32GB RDIMM in the docs (although it may still offer it).

http://h18004.www1.hp.com/products/quickspecs/14225_na/14225_na.html
Overview
HP SmartMemory

The reason is that the 32GB RDIMM will only be available in 4-rank (4-rank).

Continue reading

3 Comments

Filed under Uncategorized

Memory options for the HP DL360p and DL380p servers – 16GB memory modules

For 16GB memory modules use at 1 DPC and 2 DPC

If the memory you need is going to require 1 DPC, or 2 DPC, you are better off buying the HP Smart Memory RDIMMs.

Continue reading

4 Comments

Filed under Uncategorized

Installing memory on 2-socket servers – memory mathematics

Background – 2-sockets, memory channels and DPC

On a 2-socket server (2 processors on the motherboard), each Romley processor has 4 memory channels (up from 3 of pre-Romley). On each memory channel if you use 3 DPC (3 DIMMs per channel) you have:

Continue reading

2 Comments

Filed under Uncategorized

The need for high memory loading and it’s impact on bandwidth

The need for high memory loading

The memory you use in your home desktop computer are UDIMMs (unregistered DIMMs).

You often use 2GB or 4GB of memory on such systems.

Memory requirements on servers for virtualization, CAD, in-memory databases, high performance computing are much greater – for example 256GB or 384GB or 768GB in a 2-processor server.

Continue reading

5 Comments

Filed under Uncategorized

Second take

UPDATE: added 06/24/2012: Invensas on LRDIMM design inferiority vs. HyperCloud

Basically LRDIMMs and DDR4 are both going to be using NLST IP.

This article gives a good introduction:

Continue reading

Leave a comment

Filed under Uncategorized