GeForce GTX 465 vs Radeon HD 4850 2GB

Intro

Compare those specs to the Radeon HD 4850 2GB, which features core clock speeds of 625 MHz on the GPU, and 993 MHz on the 2048 MB of GDDR4 RAM. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB		110 Watts
GeForce GTX 465		200 Watts
	Difference: 90 Watts (82%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 465 is 61% quicker than the Radeon HD 4850 2GB overall, because of its greater bandwidth. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 39040 (61%)

Texel Rate

The GeForce GTX 465 should be a small bit (about 7%) more effective at texture filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 1708 (7%)

Pixel Rate

The GeForce GTX 465 is much (more or less 94%) more effective at full screen anti-aliasing than the Radeon HD 4850 2GB, and able to handle higher screen resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 9424 (94%)

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 information (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by the speed of its memory. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total number of texture units 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 that the graphics card can possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.