I ordered About 10 sticks of Dell SNPP9RN2C/8G , These are 8gb PC3-10600 sticks.
Here is a link. ( it is the 1st Type of Ram offered)
After putting these sticks in a t3500 I was receiving "non optimal ram config" error (the bios see's the 8gb stick). I could not get rid of this so I tried to only put the 8gb stick in. This caused the pc to not boot at all.
After looking up some stuff I found the tech manual for the t3500. Reading this I found out the t3500 only supports up to a 4gb stick per slot. Then I thought why would dell make this the 1st option when you go to purchase upgrades for a t3500. Also, On the web page for the the RAM, The 1st table does not show the t3500 listed for compatibility. However, The list lower on the page does. ( http://accessories.us.dell.com/sna/productdetail.aspx?c=us&l=en&s=dhs&cs=19&sku=A6353143&mfgpid=201440&chassisid=8560
Now after all this I Find BIOS update A11 says this under "fixed & enhancements" "Enhanced the memory map algorithm for 128GB configuration" . After installing the latest BIOS update (A17) and trying the ram again, Only putting the 8gb stick in , I still dont boot.( http://www.dell.com/support/drivers/us/en/04/DriverDetails?driverId=J7N1X&fileId=2964784371
Does A17 not contain this memory change? Why would dell offer this ram for the t3500? Or am I just missing something?