Compare any two graphics cards:
Radeon HD 4670 1GB vs Radeon HD 7790
IntroThe Radeon HD 4670 1GB makes use of a 55 nm design. ATi has clocked the core frequency at 750 MHz. The GDDR4/GDDR3/DDR3/DDR2 RAM is set to run at a frequency of 1100 MHz on this card. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 ROPs.
Compare all that to the Radeon HD 7790, which has a clock speed of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also features a 128-bit memory bus, and uses a 28 nm design. It is comprised of 896 SPUs, 56 TAUs, and 16 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically, the Radeon HD 7790 should be a lot faster than the Radeon HD 4670 1GB overall. (explain)
Texel RateThe Radeon HD 7790 will be much (approximately 133%) more effective at texture filtering than the Radeon HD 4670 1GB. (explain)
Pixel RateThe Radeon HD 7790 is a lot (more or less 167%) faster with regards to anti-aliasing than the Radeon HD 4670 1GB, and also should be capable of handling higher resolutions while still performing well. (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 max amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.
Pixel Rate: Pixel rate is the maximum amount of pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.