it an tower, or a notebook?

it a windows pc?

did you overclocked your memory?

~If it's a tower case pc with windows there are a few thinks you can do:

- if you have overclocked your memory, clock it down to it's oringinal and buy a ram cooler and then leave them like they are (they are probily not build for overclocking, that could be they reason why they are so hot)

- make sure you have set the setting write for you memory

- made sure the area is clean ,remove dust with some toilet-paper, (!dont use alcohol!, this wil destroy your motherboard and memory)

if this doesn't work there is probilly a problem with your memory and/or your dimm riser, then you need to go to a quallty pc store, to let somebody take a look at it

It's a Mac Pro. No, it's not a windows PC, no, I didn't overclock anything. I have the setting right for the memory, I know not to use alcohol, and yes it was cleaned.

I don't know much about macs or any headers on their boards, but could you install Memory cooling fans like in a PC? If the motherboard has a 3-pin header and if the case has room maybe you could. Here's an example of what I'm talking about from Zalman.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835118058

You could look and see if the board has a 3-pin header like a pc's motherboard and if there's clearance for the fans. The Cooling Fan is about 7cm tall too.

If not the fan, you can add coolers to it as well that work with system airflow.

http://www.newegg.com/Product/Product.aspx?Item=N82E16835186044

yeah, I nearly forgot about those, the mac pro doesn't have heatsinks on the memory does it?