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Gaming Performance Comparison
In terms of overall gaming performance, the graphical capabilities of the AMD Radeon HD 7770 Vapor-X GHz OC Edition are noticeably better than the AMD Radeon R7 250 2GB GDDR5.
The HD 7770 has a 100 MHz higher core clock speed and 16 more Texture Mapping Units than the R7 250. This results in the HD 7770 providing 20 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.
The HD 7770 has a 100 MHz higher core clock speed and 8 more Render Output Units than the R7 250. This results in the HD 7770 providing 9.6 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.
The R7 250 was released over a year more recently than the HD 7770, and so the R7 250 is likely to have better driver support, meaning it will be more optimized for running the latest games.
The R7 250 has 1024 MB more video memory than the HD 7770, so is likely to be much better at displaying game textures at higher resolutions. However, overall, the HD 7770 has superior memory performance.
The HD 7770 has 9.6 GB/sec greater memory bandwidth than the R7 250, which means that the memory performance of the HD 7770 is marginally better than the R7 250.
The Radeon R7 250 2GB GDDR5 has 384 Shader Processing Units and the Radeon HD 7770 Vapor-X GHz OC Edition has 640. However, the actual shader performance of the R7 250 is 345.6 and the actual shader performance of the HD 7770 is 576. The HD 7770 having 230.4 better shader performance and an altogether better performance when taking into account other relevant data means that the HD 7770 delivers a noticeably smoother and more efficient experience when processing graphical data than the R7 250.
The Radeon R7 250 2GB GDDR5 requires 65 Watts to run but there is no entry for the Radeon HD 7770 Vapor-X GHz OC Edition. We would recommend a PSU with at least 400 Watts for the R7 250.
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|Recommended RAM||8 GB||vs||8 GB|
|Recommended Screen Size||1600x900||1600x900|
|Recommended PSU||400 Watts & 20 Amps||-|
|Mini Review||Radeon R7 250 is a middle-class graphics card based on the GCN architecture. |
It packs a core codenamed Oland XT, previously used on Radeon HD 8670 (OEM). Therefore, it offers 384 Shader Processing Units, 24 TMUs and 8 ROPs, on a 128-bit bus width of fast GDDR5. While the central unit runs at 1000MHz and goes up to 1050MHz, in Turbo Mode, the memory clock operates at 1150MHz.
Its performance is somewhat comparable to Radeon HD 7750, though the latter will perform better at DirectX 11 games.
Please note that are also DDR3 variants which are significantly slower and that this GDDR5 version should come in 1GB and 2GB versions, though both will offer the same performance.
|Radeon HD 7770 Vapor-X GHz OC Edition is a special edition of the fast-middle-class Radeon HD 7770. See the standard version for more information about it. |
The differences include increased memory and core clocks, from 1125MHz to 1300MHz and from 1000MHz to 1100MHz, respectively. A new quiet and efficient cooling system, called Vapor-X, is also available.
Benchmarks indicate a 8% performance boost when compared to the standard Radeon HD 7770.
Benchmarks indicate that the most demanding games (e.g. Metro 2033) still require reduced settings to be played smoothly.