GeForce GTX 465 vs Radeon HD 4850 2GB

Intro

Compare all that to the Radeon HD 4850 2GB, which features a GPU core clock speed of 625 MHz, and 2048 MB of GDDR4 RAM running at 993 MHz through a 256-bit bus. It also is made up of 800(160x5) Stream Processors, 40 TAUs, and 16 ROPs.

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, due to 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 little bit (approximately 7%) better 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 will be a lot (about 94%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 2GB, and should be capable of handling 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 maximum amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.