Radeon HD 4830 512MB Game Requirement Analysis
Radeon HD 4830 is a high-end GPU based on the 55nm, third unified shader architecture, R700.
It's based on the RV790 LE Core (related to Radeon HD 4860) and offers 640 Shader Processing Units, 32 TMUs and 16 ROPs a 256-bit memory interface of standard GDDR3. The central unit runs at 575MHz and the memory clock runs at up to 900MHz.
It performs much worse when compared to Radeon HD 4850/Radeon HD 4870 due to being paired with standard GDDR3, featuring less Shading Units & TMUs and being relatively underclocked. However, it's expected to consume only up to 95 Watt.
Some of today's modern games should run fluently at high settings but with modest resolutions. DirectX 11 games aren't supported.