请帮帮手~~想upgrade 部电脑

现时:
主机板:GIGABYTE GA-MA790GP-DS4H
CPU : DualCore AMD Athlon 64 X2, 2700 MHz (13.5 x 200) 5200+
显示卡:ATI Radeon HD 4670 Video Adapter (1024MB)
RAM :Kingston 2G-UDIMM DDR2-800 (400 MHz) x2

1.如果我想用返张低板可以吗???
2.转CPU 转边只好AND 几$$$?
3.displays 要唔要转???
4.RAM洗唔洗+
部电脑都系打机,上网,睇片
现时部电脑开机都要成1m30s-2m 可能部机多野啦
玩GTA4好LAG 好LAG
THX THX 各位大大先

[ 本帖最后由 rickylkh0809 於 2014-6-18 07:25 PM 编辑 ]

有冇人可能帮下手呀??!?!?!

1.no
2.change cpu= change MB, amd fx8320($11XX) or intel i5 $1419
3.yes , i think 750ti will be ok ~$1200
4. if you change Mb, need to change to DDR3 ram, i think 8gb (~$540)