Tag Archives: 32GB

Awaiting 32GB HCDIMMs

Industry needs availability on a wide range of servers

When 32GB HCDIMMs become available, they will be the memory module of choice in the 32GB segment.

This will be applicable to both the regular Romley servers as well as the non-Intel-POR (plan-of-record) servers like the IBM x3750 M4 server.

The reason is that:

– HCDIMMs are RDIMM-compatible
– HCDIMMs run at higher speed than LRDIMMs
– HCDIMMs outperform LRDIMMs in latency and throughput even when HCDIMMs are run at the lower same speeds as LRDIMM

Their qualification on a wide range of servers is essential for the industry to get access to the best memory available.

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HyperCloud to own the 32GB market ?

Marketability as a better RDIMM

UPDATE: 07/09/2012 – buyout
UPDATE: 07/09/2012 – strategic value of RDIMM-compatibility and misconceptions debunked
UPDATE: 07/27/2012 – confirmed HCDIMM similar latency as RDIMMs
UPDATE: 07/27/2012 – confirmed LRDIMM latency and throughput weakness

Is Netlist a buyout candidate ?

Is LRDIMM a dead-end product ?

Is it easier to market a better RDIMM that includes all the features of an LRDIMM ?

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Non-viability of 32GB RDIMMs

The primacy of load reduction and rank multiplication for 32GB

UPDATE: added 07/06/2012: Netlist on 8Gbit DRAM die non-availability
UPDATE: added 07/06/2012: Inphi on 8Gbit DRAM die non-availability

32GB RDIMMs are all 4-rank (quad-rank).

4-rank creates a high memory load on the memory bus.

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Memory choices for SuperMicro X9 Romley servers

Absence of 1333MHz at 3 DPC – for 16GB memory modules

Like IBM and HP, SuperMicro too offers improved speeds and 1600MHz RDIMMs.

SuperMicro also supports LRDIMMs.

However, SuperMicro does not offer HyperCloud (yet).

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Memory choices for Dell 12G Romley servers

Absence of 1333MHz at 3 DPC – for 16GB memory modules

Like IBM and HP, Dell too offers improved speeds and 1600MHz RDIMMs.

Dell also supports LRDIMMs.

However, Dell does not offer HyperCloud (yet).

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