Poor service and questionable hardware setup

Bought this from Amazon just because it is lightweight and has a processor and a video card tha might be powerful enough to run my graphic intensive modeling. After using it for several days, I found two things to share with you:
1. Processor: The Computer Properties has a processor information of T7700 2.4GHz(which is right for this model), but the Device Manager-Processor shows T7500 2.2GHz. I was surpsised when I first saw this, and called Sony. The tech gave me a long email address to download a new driver to solve the problem. Sony should put this in its update list.
2.Memory upgrade: I bought 2x2Gb OCZ PC2-5400 CAS-555 trying to replace 2X1Gb Hynix(original) PC2-5300 CAS-555. But the bios only gives 3Gb.( My Sony VGN-NR180 bios shows the right 4Gb memory.) The Sony tech said PC2-5400 is the wrong spec, only PC2-5300 is right. Ridiculous. They are all the same but marketing by different manufacturers. Right now I'm struggling with different memories.