GeForce GTX 465 vs Radeon HD 4850 512MB

Intro

Compare those specifications to the Radeon HD 4850 512MB, which comes with GPU core speed of 625 MHz, and 512 MB of GDDR3 memory running at 993 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB		110 Watts
GeForce GTX 465		200 Watts
	Difference: 90 Watts (82%)

Memory Bandwidth

The GeForce GTX 465, in theory, should be much faster than the Radeon HD 4850 512MB in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 39040 (61%)

Texel Rate

The GeForce GTX 465 will be a small bit (about 7%) faster with regards to AF than the Radeon HD 4850 512MB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 1708 (7%)

Pixel Rate

If running with high levels of AA is important to you, then the GeForce GTX 465 is a better choice, by a large margin. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4850 512MB		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 MB per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high 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 by the core 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines 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 fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.