NO
no it will degrade your system
No the emachines t3612 supports pc2 4200 and pc2 5300 240 pin you can check the link also http://crucial.com/store/listparts.aspx?model=T3612
yes you can
Unfortunately you can not. DDR and DDR2 have a different pin arrangement and they will never work in each others slots.
Yes. For example the iMac uses PC2-5300 DDR2 SO-DIMM SDRAM memory.
No, you cannot. PC2 is ddr2 type of memory when PC is ddr. Those types are not compatible.
i think Mac.
1. Do you own(use) a Mac or PC? 2. What do you think works better?
no
NO and don't try
I'm positive they use Macs. They're much better for work. Get a Mac.
Put iTunes on the PC. Use the same iTunes account that is on the Mac.