Precision M4800 Slowest Computer I have ever owned

Is there a way to find out which of the 4 memory slots the Precision m4800 are made for which type of memory. I find it interesting that my m4800 came from the factory with memory in slots 2 and 3 and not in slots 0 and 1. The memory reports in as DDR3 with correct speeds, but my laptop is the slowest PC I have ever owned. I have done a lot of checking and it sure looks like a memory access or bus issue that makes anything using general memory really slow. Novabench give me a score of 330 on the Dell M4800 but my Toshiba that is slower gets a novabench score of 1200 and all the tests are right at 10 times faster on the Toshiba. It sure looks like a memory / bus thing. I have tried every trick and diagnostic that I could think of and the boot ones report a great laptop but windows runs really slow as though memory is the slowest thing. SOLVED – POWER SUPPLY Affects MEMORY SPEED You have to use the newer 9 AMP power supply with the M4800. If you are using the older 6.7 AMP power supply that is with many docking stations your entire system will slow down drastically. You will receive no warning from within windows that it is your power supply that is forcing the system to operate in slow mode. There is a bios warning on time but your IT department probably cleared that message on first boot and you will never see it again. Check you power supply to make sure it is the 9 AMP one.