[업그레이드] 이 컴퓨터 사양이이면 업글을 해야 할까요?

아니면 사는게 더 싸게 먹힐까요? 

그래픽카드만 갈아 줄려고 했는데 메인보드가 호환이 안되거나 그러면 사는게 쌀듯해서요 

조언 부탁드립니다 

		Computer:
			Computer Type	ACPI x64-based PC
			Operating System	Microsoft Windows 7 Professional
			OS Service Pack	Service Pack 1
			Internet Explorer	8.0.7601.17514
			DirectX	DirectX 11.0
			Computer Name	K-PC
			User Name	k
			Logon Domain	k-PC
			Date / Time	2014-08-14 / 12:15
		Motherboard:
			CPU Type	QuadCore Intel Core i5 750, 2733 MHz (20 x 137)
			Motherboard Name	Gigabyte GA-P55-UD3R (4 PCI, 1 PCI-E x1, 2 PCI-E x16, 4 DDR3 DIMM, Audio, Gigabit LAN)
			Motherboard Chipset	Intel Ibex Peak P55, Intel Lynnfield
			System Memory	8187 MB (DDR3 SDRAM)
			BIOS Type	Award Modular (10/26/09)
			Communication Port	Ae½A Æ÷Æ®(COM1)
			Communication Port	CA¸°AI Æ÷Æ®(LPT1)
		Display:
			Video Adapter	AMD Radeon HD 5700 Series (1024 MB)
			Video Adapter	AMD Radeon HD 5700 Series (1024 MB)
			Video Adapter	AMD Radeon HD 5700 Series (1024 MB)
			3D Accelerator	ATI Radeon HD 5770 (Juniper)
			Monitor	AI¹Y PnP ¸ð´IAI [NoDB] (2118507468089)
		Multimedia:
			Audio Adapter	ATI Radeon HDMI @ ATI Juniper/Broadway - High Definition Audio Controller
			Audio Adapter	Realtek ALC888/1200 @ Intel Ibex Peak PCH - High Definition Audio Controller [B-2]