Acer "x3810" Tower/Case Upgrade help

Read about my computer info:

System Manufacturer Acer
System Model Aspire X3810
System Type x64-based PC
Processor Pentium(R) Dual-Core CPU E5200 @ 2.50GHz, 2500 Mhz, 2 Core(s), 2 Logical Processor(s)
SMBIOS Version 2.6
Hardware Abstraction Layer Version = "6.0.6001.18000"
Name Intel(R) G45/G43 Express Chipset
PNP Device ID PCI\VEN_8086&DEV_2E22&SUBSYS_02501025&REV_03\3&11583659&0&10
Adapter Type Intel(R) 4 Series Express Chipset Family, Intel Corporation compatible
Adapter Description Intel(R) G45/G43 Express Chipset
Adapter RAM 1.76 GB (1,894,344,704 bytes)
Installed Drivers igdumd64.dll,igd10umd64.dll
Driver Version 7.15.10.1666
INF File oem17.inf (iEGL0 section)
Bits/Pixel 32
I/O Port 0x0000DC00-0x0000DC07
IRQ Channel IRQ 16
I/O Port 0x000003B0-0x000003BB
I/O Port 0x000003C0-0x000003DF
Memory Address 0xA0000-0xBFFFF
Name Intel(R) G45/G43 Express Chipset
PNP Device ID PCI\VEN_8086&DEV_2E23&SUBSYS_02501025&REV_03\3&11583659&0&11
Adapter Description Intel(R) G45/G43 Express Chipset
Adapter RAM Not Available
Installed Drivers igdumd64.dll,igd10umd64.dll
Driver Version 7.15.10.1666
INF File oem17.inf (iEGL1 section)
Memory Address 0xFE300000-0xFE3FFFFF
Driver c:\windows\system32\drivers\igdkmd64.sys (7.15.10.1666, 9.80 MB (10,276,352 bytes), 4/8/2009 11:17 PM)
Power supply: 220 watts

i want to upgrade my desktop tower computer case i am not sure what to pick all i know is i need one that is bigger the one that came with my desktop it is too small i was trying to install my pci express hd card and it wont fit cause i dont have an extra inch or 2 so it can fit so i need to get a bigger case to use it so what count i upgrade to with an acer aspire mini sff desktop T^T

Which "hd card" you trying to put in there?