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Compare any two graphics cards:
GeForce 9500 GT 1GB GDDR3 vs Radeon HD 4650 1GB
IntroThe GeForce 9500 GT 1GB GDDR3 has core speeds of 550 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR3 RAM. It features 32 SPUs along with 16 TAUs and 8 ROPs.
Compare those specs to the Radeon HD 4650 1GB, which uses a 55 nm design. AMD has clocked the core frequency at 600 MHz. The GDDR3 RAM works at a speed of 700 MHz on this particular model. It features 320(64x5) SPUs as well as 32 Texture Address Units and 8 Rasterization Operator Units.
Power Usage and Theoretical Benchmarks
Power Consumption (Max TDP)
Theoretically speaking, the GeForce 9500 GT 1GB GDDR3 should be 14% quicker than the Radeon HD 4650 1GB in general, due to its higher data rate. (explain)
Texel RateThe Radeon HD 4650 1GB will be quite a bit (approximately 118%) better at anisotropic filtering than the GeForce 9500 GT 1GB GDDR3. (explain)
Pixel RateThe Radeon HD 4650 1GB is just a bit (more or less 9%) faster with regards to full screen anti-aliasing than the GeForce 9500 GT 1GB GDDR3, 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.
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: Bandwidth is the max amount of information (measured in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. 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 are processed in one second. This number is worked out by multiplying the total number of texture units by the core speed of the chip. The better the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.
Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.