Compare any two graphics cards:
Radeon HD 5770 vs Radeon HD 6670 (OEM) 1GB
IntroThe Radeon HD 5770 uses a 40 nm design. AMD has clocked the core speed at 850 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this particular card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.
Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which makes use of a 40 nm design. AMD has clocked the core speed at 800 MHz. The GDDR5 memory runs at a frequency of 1000 MHz on this card. It features 480 SPUs as well as 24 Texture Address Units and 8 ROPs.
(No game benchmarks for this combination yet.)
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The Radeon HD 5770 should in theory be a bit faster than the Radeon HD 6670 (OEM) 1GB in general. (explain)
Texel RateThe Radeon HD 5770 should be a lot (more or less 77%) more effective at texture filtering than the Radeon HD 6670 (OEM) 1GB. (explain)
Pixel RateIf using a high screen resolution is important to you, then the Radeon HD 5770 is a better choice, by a large margin. (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.
Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.
Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be moved across the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.
Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.
Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.