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HP Pro 3000 SFF Memory Upgrade problem

Posted on 2013-11-11
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Last Modified: 2013-11-23
we have a few HP Pro 3000 SFF desktops ( VS798UT ) each with 2gb memory (Samsung M378B5673FHO-CH9) We have tried upgrading the memory with 3 different DIMM's and the desktop will not boot, blank screen, no keyboard lights and no BIOS beeps. All our research says that the specs for the desktop are: PC3-10600 DDR3 240-pin CL9 1.5v unbuffered non-ecc. Placing the old memory back in by itself and it boots up just fine.

We have tried:
Crucial  CT2CP25664BA1399
Kingston KVR133D3S8N9H/2G
Kingston KVR1333D3N9H/4G

These should all meet the specs, but we get the same results. We have tried 2 different machines and every possible memory combination.

What possibly could we be missing? I would try to get the OEM memory , but HP isn't caring it anymore and everysite I search lists it as unavailable or available for order (which I don't trust they would be able to do.)
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Question by:Joseph Strong
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Expert Comment

by:Bill Bach
ID: 39640293
Are you installing two or 4 DIMM's, and what size?  If you are installing 2, they MUST be in sockets 1 & 3 (Blue or white).  If installing 4, they should all be the same for the best results.  

There are a few more requirements for supported memory modules here:
   http://h20565.www2.hp.com/portal/site/hpsc/template.PAGE/public/kb/docDisplay/?spf_p.tpst=kbDocDisplay&spf_p.prp_kbDocDisplay=wsrp-navigationalState%3DdocId%253Demr_na-c01924649-2%257CdocLocale%253D%257CcalledBy%253D&javax.portlet.begCacheTok=com.vignette.cachetoken&javax.portlet.endCacheTok=com.vignette.cachetoken

FYI -- I used the Kingston web site to look these up and found KTH9600BS/2G.  Did you get something different from them?
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Expert Comment

by:nobus
ID: 39640909
They must NOT be installed in sockets 1 & 3; that's only required if you want them to run in dual channel mode
the page you referred to above says :
The system will automatically operate in single channel mode, dual channel mode, or flex mode, depending on how the DIMMs are installed

it also says :
In addition, the computer supports:
•512-Mbit, 1-Gbit, and 2-Gbit non-ECC memory technologies

•single-sided and double-sided DIMMs
•DIMMs constructed with x8 and x16 DDR devices; DIMMs constructed with x4 SDRAM are not supported


so that's why 4GB dimms won't function
and CT2CP25664BA1399 is unknow - some typo's  maybe??
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Accepted Solution

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Joseph Strong earned 0 total points
ID: 39657827
It turns out that the HP required low density chips and the we had been getting High density one's.
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Author Closing Comment

by:Joseph Strong
ID: 39671124
call to Crucial tech support provided answer to question.
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