PC requirements

Assassin's Creed System Requirements

Assassin's Creed needs at least Dual core processor 2.6 GHz Intel® Pentium® D or AMD Athlon™ 64 X2 3800+ (Intel Core® 2 Duo 2.2 GHz or AMD Athlon 64 X2 4400+ or better recommended) and 256 MB DirectX® 10.0-compliant video card or DirectX 9.0-compliant card with Shader Model 3.0 or higher (*see supported list) graphics.

Verified Sources: Steam store listing
Assassin's Creed minimum and recommended PC specifications
Component Minimum
Processor Dual core processor 2.6 GHz Intel® Pentium® D or AMD Athlon™ 64 X2 3800+ (Intel Core® 2 Duo 2.2 GHz or AMD Athlon 64 X2 4400+ or better recommended)
Graphics 256 MB DirectX® 10.0-compliant video card or DirectX 9.0-compliant card with Shader Model 3.0 or higher (*see supported list)
Additional notes DirectX 9.0 or 10.0-compliant sound card (5.1 sound card recommended)
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Other platforms

Assassin's Creed is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running Assassin's Creed on PC

Can my PC run Assassin's Creed?
Compare your CPU, GPU and RAM against the minimum column below. If your parts match or beat every minimum row, the game will launch — though you may need to lower settings. Matching the recommended column is what gets you 60fps at 1080p.
How much storage does Assassin's Creed need?
Storage requirements are not published for this title yet.