High density Corsair XMS3 won't run

Hi,
My first post here so any help welcome, please.

One of my RAM modules went faulty so I did a RMA return to Corsair.
Unfortunately, the replacement stick is high density RAM.
Corsair's response to my request is:

Based on Intel's specification for their Q45 chipset, the memory controller can read up to 2Gb IC modules:

2Gb IC, single rank (8 IC chips total on module) = 2GB module
2Gb IC, dual rank (16 IC chips on module) = 4GB module
4Gb IC, single rank (8 IC) = 4GB module

As you can see, there are two ways to create a memory module - a dual rank, lower density IC or a single rank, high density IC. If the CMX4GX3M1A1333C9 does not work on your system, it is more than likely that it is based on the 4Gb IC technology which the Q45 chipset cannot use. I mentioned "likely" because the IC chip market is very dynamic and as such, our modules are manufactured based on the availability of these chips.


When I asked them how I could proceed, I've had no response.
Is there a way of knowing whether they would send high or low density replacement?
I need a 4GB low density DDR3 module.
Do they call the module by the same reference number, irrespective of what chips are in it?

The computer is a Dell Optiplex 780DT

Thanks for any help.

Well unless you installed the ram yourself Dell should be responsible directly for there faulty stick of ram. It should be them contacting Corsair and getting a replacement to the specification required. It could be a case of the fact Corsair build the type of ram for dell and its not quite the same as a retail stick would be. I know this isn't a this will fix it answer but hopefully it helps in some way.