Thought I would throw this in for comparison. When I bought custom pcs back in 2009 for both my wife and I, I used the same NZXT case for both. Then recently I had to change out her MB, and while at it put in my original video card from 2009. The only difference in the cases is I had to take out a side fan to make room for a new CPU cooler recently.
Operating System
Windows Vista Home Basic 64-bit SP2
CPU
AMD Athlon II X4 620 31 °C
Propus 45nm Technology
RAM
4.00GB Dual-Channel DDR2 @ 267MHz (4-4-4-12)
Motherboard
ASRock 960GC-GS FX (CPUSocket) 34 °C
Graphics
JC199D (1024x768@75Hz)
ATI AMD 760G (ASRock)
512MB NVIDIA GeForce GTS 250 (EVGA) 37 °C
CrossFire Disabled
Storage
298GB Hitachi HDT721032SLA360 ATA Device (SATA) 35 °C
Optical Drives
TSSTcorp CDDVDW SH-S223B ATA Device
YMaxCorp magicJackPlus CD USB Device
Audio
Realtek High Definition Audio
500 Watt power supply
Yes I have windows 7, while hers is Vista, that is a recent addition to my computer, as is the CPU cooler
http://www.newegg.com/Product/Product.aspx?Item=N82E16835103065
and the video card. So essentially they look identical, but under the hood are two entirely different beasts.