Cần tư vấn về máy IBM IntelliStation M Pro 6225 4J7, Nâng cấp sao cho hiệu quả ?

Product MPN MPN 622532U Key Features Form Factor Mini Tower Processor Intel Pentium 4 3.8 GHz Chipset Intel 925X Express Installed Memory 1 GB (DDR2 SDRAM) Operating System Microsoft Windows XP Professional Recommended Use Corporate Business, Small Business Processor Processor Type Intel Pentium 4 Processor Speed 3.8 GHz Processor Manufacturer Intel Installed Qty 1 Max Processors Qty. 1 Motherboard Bus Speed 800 MHz Video Output Interface PCI Express Memory RAM Technology DDR2 SDRAM Installed RAM 1GB Max Supported RAM 4 GB Number of Memory Slots 4 x DIMMs Installed Video Memory 128 MB Supported RAM Speeds 400 MHz Installed Cache Memory 1 MB Technical Features Integrated Input/Output Ports USB 2.0 x 8 • Serial Port x 2 • RJ45 Lan Port x 1 • Parallel Port (ECP/EPP/SPP) x 1 Expansion Bays 2 x 5.25" (External Access) • 1 x 3.5" (Internal Access) • 2 x 3.5" (External Access) Expansion Slots PCI Express x16 x 1 • PCI Express x1 x 1 • PCI x 2 Power Configurations Wake On LAN Header Other Features Hyper Thread Technology Ready • Dual Channel Memory Architecture Hard Drive Hard Drive Capacity 80 GB Hard Drive Interface Serial ATA Hard Drive Rotation Speed 7,200 RPM Controller Type Serial ATA • DMA/ATA-100 (Ultra) CD / DVD DVD combo Audio / Video Audio Input Microphone Jack • 1 x Line In Audio Output Type Sound Card • Headphones • Line out Integrated Audio AC97 Audio Codec Max. Video Resolution 3840 x 2400 Networking Networking Type Integrated 10/100/1000 Network Card Data Link Protocol Ethernet • Fast Ethernet • Gigabit Ethernet Cho mình hỏi cấu hình này cần nâng cấp ram và card màn hinh ko, có cần gắn thêm cái quạt đằng sau ko mình chỉ chơi game online nếu nâng cấp card màn hình thì nâng cấp loại nào cho thích hợp và ram nào cho thích hợp Cám ơn!