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Windows 7 Ultimate x64 Upgraded RAM from 4gb to 8gb. Seems slower.
I recently bought a 4gb stick of RAM. and installed it onto my Aspire X3950 Motherboard. The two previous sticks are "GU512303EP0202 Unifosa 2GB GDDR3-1333 DIMM RAM Memory" and the are installed in the 2 slots of the 'white' channel. The new 'third' stick I just installed is "PNY Optima 4GB 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666) Desktop Memory Model MD4096SD3-1333", and it is installed in the the first slot of the 'black' channel. They are identical in every aspect as far as I can tell. My computer seems to be running slower than usual. It will lag at times I've never experienced lag before. I've tried looking around the forums, and can not figure out what to do with my particular situation. ANY help would be greatly appreciated :)