Compare any two graphics cards:
Radeon HD 7770 vs Radeon R9 270X
IntroThe Radeon HD 7770 makes use of a 28 nm design. ATi has clocked the core frequency at 1000 MHz. The GDDR5 memory works at a speed of 1125 MHz on this card. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.
Compare those specifications to the Radeon R9 270X, which makes use of a 28 nm design. ATi has clocked the core frequency at 1000 MHz. The GDDR5 RAM runs at a frequency of 1400 MHz on this specific card. It features 1280 SPUs along with 80 Texture Address Units and 32 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
In theory, the Radeon R9 270X will be 149% faster than the Radeon HD 7770 in general, due to its greater data rate. (explain)
Texel RateThe Radeon R9 270X will be much (approximately 100%) better at anisotropic filtering than the Radeon HD 7770. (explain)
Pixel RateThe Radeon R9 270X should be quite a bit (about 100%) more effective at anti-aliasing than the Radeon HD 7770, and should be able to handle higher resolutions more effectively. (explain)
Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.
Price ComparisonPlease note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.
Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. It's worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.
Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.