Compare any two graphics cards:
GeForce 8600 GT 1GB GDDR3 vs Radeon HD 3690/3830
IntroThe GeForce 8600 GT 1GB GDDR3 comes with core clock speeds of 540 MHz on the GPU, and 700 MHz on the 1024 MB of GDDR3 RAM. It features 32 SPUs along with 16 Texture Address Units and 8 ROPs.
Compare those specifications to the Radeon HD 3690/3830, which comes with a clock frequency of 668 MHz and a GDDR3 memory speed of 828 MHz. It also makes use of a 128-bit memory bus, and uses a 55 nm design. It features 320(64x5) SPUs, 16 TAUs, and 16 ROPs.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
The Radeon HD 3690/3830, in theory, should be just a bit faster than the GeForce 8600 GT 1GB GDDR3 in general. (explain)
Texel RateThe Radeon HD 3690/3830 should be a lot (approximately 24%) faster with regards to texture filtering than the GeForce 8600 GT 1GB GDDR3. (explain)
Pixel RateThe Radeon HD 3690/3830 is quite a bit (approximately 147%) better at AA than the GeForce 8600 GT 1GB GDDR3, and should be capable of handling higher resolutions better. (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 information (counted in MB per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better 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 applied per second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.
Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.