PC requirements

The Elder Scrolls V: Skyrim - Dawnguard System Requirements

The Elder Scrolls V: Skyrim - Dawnguard needs at least Dual Core 2.0GHz or equivalent processor, 2 GB RAM and Direct X 9.0c compliant video card with 512MB of RAM graphics. For the recommended experience you want Quad-core intel or AMD CPU, 4 GB RAM and DirectX 9.0c compatible NVIDIA or AMD ATI video card with 1GB of RAM (Nvidia GeForce GTX 260 or higher; ATI Radeon 4890 or higher) graphics.

Verified Sources: Steam store listing
The Elder Scrolls V: Skyrim - Dawnguard minimum and recommended PC specifications
Component Minimum Recommended
Operating system Windows7/Vista/XP PC (32 or 64 bit) —
Processor Dual Core 2.0GHz or equivalent processor Quad-core intel or AMD CPU
Memory 2 GB RAM 4 GB RAM
Graphics Direct X 9.0c compliant video card with 512MB of RAM DirectX 9.0c compatible NVIDIA or AMD ATI video card with 1GB of RAM (Nvidia GeForce GTX 260 or higher; ATI Radeon 4890 or higher)
Storage 6 GB HD space 6 GB HD space
Not sure how your PC compares? Use the Can I Run It checker — pick your CPU and GPU and it tells you which column you land in.

Other platforms

The Elder Scrolls V: Skyrim - Dawnguard is also available on these systems, where hardware is fixed and no per-PC check is needed:

Quick answers

Running The Elder Scrolls V: Skyrim - Dawnguard on PC

Can my PC run The Elder Scrolls V: Skyrim - Dawnguard?
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 The Elder Scrolls V: Skyrim - Dawnguard need?
6 GB HD space
What is the difference between minimum and recommended specs?
Minimum means the game starts and is playable, usually at 30fps on low settings at 1080p. Recommended is the developer's target for a smooth 60fps experience at high settings.