请各位电脑高手解答

想用黎挽BF4 & COD10
CPU: Intel Core i7-4770 Haswell (3.4G, 8M Cache, HD 4600 Graphics,84W,LGA1150) Ram:Kingston 4+8G DDR3-1600 Ram (4G × 2) (8G x 1)
Rom光碟机:24X CD/DVD Multi烧录机
Case: Cooler Master Elite 431 Plus
Power Supply : Cooler Master 620W
Cooling :Cooler Master Seidom 120XL一体式水冷散热器
Sound Card 音效卡: 主板内置5.1/7.1声道高清音效输出
VGA显示咭: ASUS GTX770-DC2OC-2GD5
MAINBOARD: MSI Z77A-GD55
HDD : 2000G硬碟(7200RPM/64M Cache/SATA3 6Gbps)
1)请问咁样大慨要几钱？
2)我想问咁既组合岩唔岩？(会唔会边部分过劲/废)
3)仲有r9 280x & gtx 770 边个好用啲？
4)仲有啲咩要修改？

8500-9000

Intel Xeon E3-1230v3 Haswell (3.3GHz,8M Cache,LGA 1150,22nm) CPU BOX HK$ 1980
GIGABYTE G1.Sniper B5 B85,DDR3,LGA 1150,USB3.0,SATA3 6Gb/s ATX M/B HK$ 870
Kingston DDR3 1600MHz 8GB (1x8GB) Ram KVR16N11/8 HK$ 583
WD Blue WD10EZEX 1TB SATA3 6Gb/s /64MB HDD HK$ 429
Plextor 128GB PX-128M5S M5S Series 2.5" SATA3 6Gb/s SSD HK$ 765
MSI DI-N770TG4 GTX770 OC 4GB GDDR5 PCI-E3.0 HK$ 3100
LG GH24NSB0 24X DVD Writer /SATA/黑色 HK$ 130
ANTEC HCG620M High Current Gamer (Modular 模组) 620W 80Plus Bronze Cable Management 火牛 HK$ 680
Cooler Master N400(NSE-400-KWN2) 透明侧窗 USB3.0+XTRAFLO Fan 中直立式机壳 HK$ 419
~~~~~~~~~~~~~~~~~~ TOTAL $8956 ~~~~~~~~~~~~~~~~~~
E3-1230v3 = 无内显的 i7！

如cpu买4771：
Intel Core i7-4771 Haswell (3.5GHz, 8M Cache, LGA 1150, 22nm) CPU BOX HK$ 2399
~~~~~~~~~~~~~~~~~~ TOTAL $9375 ~~~~~~~~~~~~~~~~~~

要散热好d，加只cpu cooler！
Cooler Master Hyper 212X HK$ 245