GeForce GT 240 GDDR5 vs Radeon HD 4850 2GB

Intro

Compare all of that to the Radeon HD 4850 2GB, which makes use of a 55 nm design. AMD has clocked the core frequency at 625 MHz. The GDDR4 RAM works at a frequency of 993 MHz on this card. It features 800(160x5) SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 40 Watts (57%)

Memory Bandwidth

The Radeon HD 4850 2GB should in theory perform just a bit faster than the GeForce GT 240 GDDR5 overall. (explain)

Radeon HD 4850 2GB		63552 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 2GB should be much (about 42%) better at texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 7400 (42%)

Pixel Rate

The Radeon HD 4850 2GB will be much (approximately 127%) better at AA than the GeForce GT 240 GDDR5, and also should be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 4850 2GB		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: Bandwidth is the largest amount of data (in units of megabytes per second) that can be moved over the external memory interface in a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.