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Gaming Performance Comparison
In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7750 Sapphire 2GB DDR3 Edition are massively better than the AMD Radeon HD 7640G + HD 7470M Dual.
The HD 7750 was released less than a year after the HD 7640G, and so they are likely to have similar driver support for optimizing performance when running the latest games.
The HD 7750 has 1024 MB more video memory than the HD 7640G, so is likely to be much better at displaying game textures at higher resolutions. This is supported by the fact that the HD 7750 also has superior memory performance overall.
The memory bandwidth of the Radeon HD 7640G + HD 7470M Dual and the Radeon HD 7750 Sapphire 2GB DDR3 Edition are the same, which means the HD 7640G and the HD 7750 have equal limitations when it comes to graphical data transfer.
The Radeon HD 7640G + HD 7470M Dual has 256 Shader Processing Units and the Radeon HD 7750 Sapphire 2GB DDR3 Edition has 512. However, the actual shader performance of the HD 7640G is 109 and the actual shader performance of the HD 7750 is 348. The HD 7750 having 239 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7750 delivers a noticeably smoother and more efficient experience when processing graphical data than the HD 7640G.
We would recommend a PSU with at least 400 Watts for the HD 7750, but we do not have a recommended PSU wattage for the HD 7640G.
|Mini Review||Radeon HD 7640G + HD 7470M Dual is a combination of a Radeon 7640G (integrated graphics) with a Radeon HD 7470M (dedicated). |
This combination is called Asymmetric CrossFire and can also lead to Micro Stuttering.
Benchmarks indicate the performance is better than a single Radeon HD 7470M performing by itself but this will depend a lot from game to game and on the drivers installed.
|Radeon HD 7750 Sapphire 2GB DDR3 Edition is a special edition of the fast-middle-class Radeon HD 7750 1GB DDR3. |
This version has no new features (when compared to the DDR3 version) and so it performs exactly like it.
|Possible GPU Upgrades||-||-|