GeForce GTX 465 vs Radeon HD 4850 2GB

Intro

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

Display Graphs

Hide Graphs

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

The GeForce GTX 465 should theoretically perform much faster than the Radeon HD 4850 2GB overall. (explain)

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

Texel Rate

The GeForce GTX 465 is a little bit (approximately 7%) faster with regards to anisotropic 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 quite a bit (approximately 94%) better at AA than the Radeon HD 4850 2GB, and also should be capable of handling higher resolutions while still performing well. (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 largest amount of information (measured in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total amount of texture units of the card 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.