topic Re: rx8640 memory question in Integrity Servers

rx8640 memory question

KPS — Wed, 09 Dec 2009 03:42:45 GMT

We have a memory question regarding an RX8640.

It looks like 512GB is the maximum memory capacity on the rx8640 according to the HP website where I'm looking at Integrity Midrange Section.

I'm assuming this means 512GB with all 4 cells popoulated with all dimm slots filled with the maximum sized dimms? If so am I safe to believe that the max memory per each cell is 128GB?

Any help on this with clarification would really be appreciated.

Thanks,
/KPS

Re: rx8640 memory question

Denver Osborn — Wed, 09 Dec 2009 04:00:07 GMT

You are correct.

The rx8640 can have up to 4 cells, each cell will have a max of 16 DDR2 DIMM slots. Memory is installed in pairs, the largest DIMM is 8GB... 128GB per cell max. Fill up all 4 cells with the max memory config and you're limited to 512GB.

Look over the quick specs for more detail
http://h18000.www1.hp.com/products/quickspecs/12471_div/12471_div.HTML#Configuration

*search the page for "rx8640 Recommended Memory Configurations"

-denver

Re: rx8640 memory question

freddy_21 — Wed, 09 Dec 2009 04:07:56 GMT

hi KPS,
For RX8640 have SEU ( Server Expension Unit ) with max total cellboard is 8.

1 cellboard have 16 slot memory, and the max size memory for one slot is 4 GB

8*16*4=512 GB.

regards
Freddy

Re: rx8640 memory question

freddy_21 — Wed, 09 Dec 2009 04:13:44 GMT

Hi KPS,

Sorry i am wrong about SEU, Total max cellboard is 4. SEU contain I/O only.

max memory for one slot is 8 GB. I think Denver right about that.

Sorry for my fault.

Regards
Freddy

Re: rx8640 memory question

Denver Osborn — Wed, 09 Dec 2009 04:15:36 GMT

freedy, SEU is for I/O, you won't get an additional 4 cell boards by adding the server expansion unit... it buys you 16 pci-x slots... no more memory or cpu. just i/o expansion.

max dimm is 8GB, installed in pairs. total 512GB supported.

-denver

Re: rx8640 memory question

KPS — Wed, 09 Dec 2009 15:14:13 GMT

Thanks everyone for your replies.

Looks like these are the final *MAX TOTALS*

MAX Memory for RX8640 - 512MB
MAX Memory per Cell - 128MB
MAX DIMM SIZE on RX8640- 8192MB

Thanks everyone for all the useful information. Points assigned!

Regards,
/KPS