Dell PowerEdge T310 won't boot after adding RAM

We are attempting to add an additional 4GB of RAM (2-2GB chips) to our Dell T310 server running SBS 2008 (64bit of course). It currently has 8GB of RAM installed (4-2GB chips). The RAM is from Crucial and is the EXACT same as the RAM that is in it now (we removed the original RAM a few months back as it was slightly different than the Crucial).

After intsalling the RAM, the computer sounds like its starting up but screen stays black and never gets to the post screen.

I'm pretty confident that it is NOT the RAM.

(I'm planning on doing a test of switching out the installed RAM with the new RAM to eliminate the actual RAM as the issue)

Any other suggestions?
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PowerEdgeTechConnect With a Mentor IT ConsultantCommented:
Sorry, for some reason I was thinking T410.  On the T310, using UDIMM's you are limited to 8GB of RAM - slots 5 and 6 are unusable with a UDIMM configuration.  To use all 6 slots, you must use RDIMM's:
John KratzerCommented:
Some of the Power Edge servers are finicky about the order of RAM when they are not all equal.
I had this happen with a 2850.  I had to have the smaller memory modules in the first slots with the larger in the next 2.

It is also possible that one of the new memory modules are bad.  Had that with memory "certified" by IBM for a blade server.
rheideAuthor Commented:
Thanks for the comment!
All the chips are 2GB so they should all be equal. I think swapping out the new ones with existing should help eliminate the actual RAM as the problem - just waiting for a good time to do it ;-)
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Scroll down to System memory for tons of information on your servers memory requirements at:

The following is from your manual:
General Memory Module Installation Guidelines
To ensure optimal performance of your system, observe the following general guidelines when configuring your system memory.

  NOTE: Memory configurations that fail to observe these guidelines can prevent your system from starting and producing any video output.  

RDIMMs and UDIMMs cannot be mixed.

Except for memory channels that are unused, all populated memory channels must have identical configurations.

Memory modules of different sizes can be mixed in A1-A3 or B1-B3 (for example, 2-GB and 4-GB), but all populated channels must have identical configurations.

The memory speed of each channel depends on the memory configuration:

For single- or dual-rank memory modules:

One memory module per channel supports up to 1333 MHz.

Two memory modules per channel support up to 1333 MHz.

Three memory modules per channel support up to 800 MHz.

For quad-rank memory modules:

One memory module per channel supports up to 1067 MHz.

Two memory modules per channel are limited to 800 MHz, regardless of memory module speed.

If quad-rank memory modules are mixed with single- or dual-rank modules, the quad-rank modules must be installed in the sockets with the white release levers.

If memory modules with different speeds are installed, they will operate at the speed of the slowest installed memory module(s).

rheideAuthor Commented:
Here is what we have purchased:

Currently installed:
CT1150298 4GB kit (2GBx2), 240-pin DIMM Upgrade for a Dell PowerEdge T310 System * 2

Trying to install:
CT1150298 4GB kit (2GBx2), 240-pin DIMM Upgrade for a Dell PowerEdge T310 System

Be aware of these memory installation guidelines:

- the server can support up to 32GB (RDIMM) only;
- Support 6 R-DIMMs or 4 U-DIMMs,
- Dont mix and match RDIMMS and UDIMMS
- Be aware of memory rankings and on how to properly populate memory modules.
- consider also the speed of each modules when installing with different speed specs (this is the same as disk in an array- the slowest memory (disk) will be followed.


PowerEdgeTechIT ConsultantCommented:
This server will support either RDIMM's or UDIMM's (either way, they must be ECC), but not both at once.  Make sure they are both one or the other.

These are by far the most common, but the memory must be x4 or x8-based DIMM's, and there are restrictions if quad-ranked modules are used (4R).  What "ranks" are your memory modules ... are they all the same (1R, 2R, 4R)?
rheideAuthor Commented:
Does this help at all?
I've highlighted the differences.
rheideAuthor Commented:
Additional details regarding the RAM:

DDR3 PC3-10600 • CL=9 • Unbuffered • ECC • DDR3-1333 • 1.5V • 256Meg x 72 •  Part #: CT1150298
PowerEdgeTechIT ConsultantCommented:
Do you have a single processor or two?
rheideAuthor Commented:
Single. X3440 Xeon Processor, 2.53 GHz8M Cache, Turbo, HT
rheideAuthor Commented:
Thanks PowerEdgeTech - I would never have even thought to check that. Genius.
PowerEdgeTechIT ConsultantCommented:
No problem ... their new servers' memory configurations/requirements are far from simple :)
Glad that was it.
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