Is this a good gaming PC?

SuperBaked

Honorable
Jun 24, 2013
12
0
10,510
Dell XPS 8500-6843WHT Desktop PC

Intel Core i7-3770
12GB DDR3
2TB SATA Hard Drive+32GB SSD
AMD Radeon HD7770 Graphics
Windows 8

Priced @ 1,299.00 USD

Is the graphic card upgradable? I've heard Dell's aren't but I've been out of PC gaming for over a decade.
 
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PCPartPicker part list / Price breakdown by merchant / Benchmarks

CPU: Intel Core i5-4670K 3.4GHz Quad-Core Processor ($239.99 @ Newegg)
CPU Cooler: Cooler Master Seidon 120M 86.2 CFM Liquid CPU Cooler ($34.99 @ Newegg)
Motherboard: Gigabyte GA-Z87X-UD3H ATX LGA1150 Motherboard ($169.99 @ Newegg)
Memory: Corsair Vengeance 8GB (2 x 4GB) DDR3-1600 Memory ($59.99 @ Newegg)
Storage: Western Digital Caviar Blue 1TB 3.5" 7200RPM Internal Hard Drive ($65.98 @ Outlet PC)
Video Card: Asus GeForce GTX 770 2GB Video Card ($399.99 @ NCIX US)
Case: Fractal Design Define R4 (Black Pearl) ATX Mid Tower Case ($84.99 @ Microcenter)
Power Supply: XFX 550W 80 PLUS Bronze Certified ATX12V / EPS12V Power Supply ($45.99 @ NCIX US)
Total: $1071.91
(Prices include shipping, taxes, and discounts when available.)
(Generated by PCPartPicker 2013-06-24 11:37 EDT-0400)