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RAM recognised by Windows, not BIOS ?

I

ifmhome

n00b
Joined
Jun 12, 2012
Messages
5
Hi
I added a 4gb ECC stick to the exisiting (suppled) 2Gb stick in my new HP Proliant microserver.
Windows says 6GB installed, but only 3.8GB usuable. Bios only recognises 4Gb.
CPU-z also says 6gb installed, but clearly I cant use it without the BIOS recognising it.

Tried resetting by removing the CMOS backup battery and shorting the reset pins - but to no avail.

Individually, the 4gb and 2gb sticks work and are recognised as expected, but no combination in either slot of the combined pair delivers 6gb usable or recognised by the BIOS.

As the Proliant microserver has limited BIOS parameters accessible and I am on BIOS 41 - which I beleive is the latest - I cant see what else to try ?

Any ideas please !
Thanks
 
See if there is a bios update for your motherboard.
Look in the bios settings and see if there is a "memory hole remapping" setting.
Also from what i've read, you need to have 2 matching sticks of memory for this computer.
Running 2 different size sticks of ram apparently will not work correctly on that board.
Please see this chart for supported memory options for your computer...

http://h18004.www1.hp.com/products/quickspecs/13716_na/13716_na.HTML#Memory
 
Last edited:
Many thanks for your reply and help

I think I am already on the most recent bios - and I dont see the memory remap option

I have read on other posts on the microserver of people mixing memory sizes without problem, but perhaps you are right - cant see any other options !:confused:
 
I added a 4gb ECC stick to the exisiting (suppled) 2Gb stick in my new HP Proliant microserver.
Click to expand...

Are both sticks ECC? Are they both the same voltage? Are they both DDR3 1333 or lower?
 
Windows Home Server (if that is what you are running) prior to 2011 only recognizes 4GB RAM http://msdn.microsoft.com/en-us/lib...px#physical_memory_limits_windows_home_server 2011 upgraded this support to 8GB I believe. The motherboard in the latest PMS supports up to 8GB RAM (which particular model do you have). You need to be running an x64 version of regular Windows to support more than 4GB addressable. As to why CPU-z shows more, it is probably just probing the connected devices. Depending on device, mixing and matching RAM module sizes can cause problems. Sometimes the larger has to be in the first slot, sometimes the smaller and sometimes it doesn't work at all.
 
Hi - many thanks for the responses
Both sticks are ECC
I am running WHS2011 (wish I wasnt given the problems with the connector, but thats another story)

As I said, I really cant see why it wont pick up the 6gb ?
 
It could be the size difference between dimms or a voltage difference causing the bios to ignore one of the dimms. I have seen this before.
 
If you look at the link you posted http://h18004.www1.hp.com/products/quickspecs/13716_na/13716_na.HTML#Memory This model only officially lists memory either a single DIMM in one slot or the other, or two DIMMS of identical size in each slot. It doesn't say you can mix and match disparate sizes. You can have 1 two, 1 four, 2 twos or 2 fours. That's it as far as what they recommend. Just because it says the chart does not represent all possible memory configurations, it doesn't necessarily mean that anything but what is listed will work (that's something pretty standard about HP publications)
 
Agreed - thanks

There are plenty of posts of users fitting an additional stick and the total memory being added to the exisiting 1Gb or 2Gb HP supplied stick - so I thought I just had an error or needed to change something

Perhaps not in this case !
 
Microservers ar pretty unique in that you can mix n match all manner I memory.

Eg mix ecc and non ecc
Mix differing sizes of memory

Hell they even run with some memory modules 16gig

Dumb question.... But is ( like windows 7 ) there two versions of whs 2011.... Eg a 32bit one and a 64bit one?

If so... Which one did you use?

.
 
Hi
I didnt know there were a 32 and 64 bit version of WHS2011 - I thought it was 64 only ?
 
ifmhome said:
Agreed - thanks

There are plenty of posts of users fitting an additional stick and the total memory being added to the exisiting 1Gb or 2Gb HP supplied stick - so I thought I just had an error or needed to change something

Perhaps not in this case !
Click to expand...

I didn't say it wouldn't work. It all depends on which model you have (and which hardware revision of that model you have). I just pointed out what the specs say IS implicitly supported.
 
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