GeForce GTX 465 vs Radeon HD 4650 512MB

Intro

Compare those specs to the Radeon HD 4650 512MB, which comes with core clock speeds of 600 MHz on the GPU, and 500 MHz on the 512 MB of DDR2 memory. It features 320(64x5) SPUs along with 32 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 512MB		55 Watts
GeForce GTX 465		200 Watts
	Difference: 145 Watts (264%)

Memory Bandwidth

Performance-wise, the GeForce GTX 465 should theoretically be much superior to the Radeon HD 4650 512MB in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4650 512MB		16000 MB/sec
	Difference: 86592 (541%)

Texel Rate

The GeForce GTX 465 will be much (about 39%) more effective at anisotropic filtering than the Radeon HD 4650 512MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4650 512MB		19200 Mtexels/sec
	Difference: 7508 (39%)

Pixel Rate

The GeForce GTX 465 should be quite a bit (approximately 305%) more effective at AA than the Radeon HD 4650 512MB, and also capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4650 512MB		4800 Mpixels/sec
	Difference: 14624 (305%)

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

Specifications

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called 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 - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.