Hi Steve Thanks for the info. From your picture, you are using Intel E5503 which supports only 800MHz memory speed. You can refer to Intel page for more info:- [URL] Here's a technical guide for T410, refer to page 32 on the supported processor descriptions and features:- [URL] Hope this helps.  
I installed in my Dell T410 (2) sticks of Crucial 8GB DDR3 PC3-10600 • CL=9 • Dual Ranked • x8 based • Registered • ECC • DDR3-1333 • 1.35V • 1024Meg x 72.  Memory is in socket 1 and 2.  No other memory is installed.  Upon boot, memory says it is running at 800MHz.  Installed CPU-Z to verify.  It says it is running at 400MHz which doubled is my 800MHz.  From everthing I read, the memory should be at at 1067 MHz.  Went into BIOS and did not see any setting that could be changed.  I did notice that it is running at 1.5volts instead of 1.35V.  I reinstalled the (4) 2GB sticks that were in before with same specs as above except it wasn't registered.  It ran at the same speed (800MHz). Shouldn't this memory be running at a faster speed?  Thanks, Steve Reynolds
Dell T410 Memory Running Too Slow