GeForce GT 440 1.5GB vs Radeon HD 4850 2GB

Intro

Compare all of that 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 along with 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 440 1.5GB		56 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 54 Watts (96%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 2GB should be 47% quicker than the GeForce GT 440 1.5GB in general, because of its higher data rate. (explain)

Radeon HD 4850 2GB		63552 MB/sec
GeForce GT 440 1.5GB		43200 MB/sec
	Difference: 20352 (47%)

Texel Rate

The Radeon HD 4850 2GB should be much (more or less 75%) more effective at texture filtering than the GeForce GT 440 1.5GB. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
GeForce GT 440 1.5GB		14256 Mtexels/sec
	Difference: 10744 (75%)

Pixel Rate

The GeForce GT 440 1.5GB should be a lot (approximately 43%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 2GB, and also able to handle higher resolutions better. (explain)

GeForce GT 440 1.5GB		14256 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 4256 (43%)

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: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 are processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics 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 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 calculated by multiplying the number of ROPs 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 is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.