GeForce GT 240 GDDR5 vs Radeon HD 4850 1GB

Intro

Compare all that to the Radeon HD 4850 1GB, which features core speeds of 625 MHz on the GPU, and 993 MHz on the 1024 MB of GDDR4 memory. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon HD 4850 1GB		110 Watts
	Difference: 40 Watts (57%)

Memory Bandwidth

The Radeon HD 4850 1GB, in theory, should be a little bit faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon HD 4850 1GB		63552 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 1GB will be a lot (more or less 42%) better at AF than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4850 1GB		25000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 7400 (42%)

Pixel Rate

The Radeon HD 4850 1GB is much (approximately 127%) faster with regards to FSAA than the GeForce GT 240 GDDR5, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 4850 1GB		10000 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 5600 (127%)

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 (counted in megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The higher 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 the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.