Compare any two graphics cards:
Radeon HD 3690/3830 vs Radeon HD 4650 1GB
IntroThe Radeon HD 3690/3830 has a GPU core speed of 668 MHz, and the 256 MB of GDDR3 memory runs at 828 MHz through a 128-bit bus. It also is comprised of 320(64x5) SPUs, 16 TAUs, and 16 ROPs.Compare those specs to the Radeon HD 4650 1GB, which uses a 55 nm design. AMD has set the core speed at 600 MHz. The GDDR3 memory runs at a frequency of 700 MHz on this specific model. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 ROPs.
Display Graphs
Power Usage and Theoretical BenchmarksPower Consumption (Max TDP)
Memory BandwidthTheoretically, the Radeon HD 3690/3830 should be a bit faster than the Radeon HD 4650 1GB in general. (explain)
Texel RateThe Radeon HD 4650 1GB will be quite a bit (approximately 80%) faster with regards to anisotropic filtering than the Radeon HD 3690/3830. (explain)
Pixel RateIf running with high levels of AA is important to you, then the Radeon HD 3690/3830 is superior to the Radeon HD 4650 1GB, and very much so. (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 Comparison
Display Prices
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. Specifications
Display Specifications
Memory Bandwidth: Memory bandwidth is the max amount of data (counted in MB per second) that can be transported across the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions. Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the graphics 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 maximum amount of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.
Display Prices
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.
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