GeForce GT 240 GDDR5 vs Radeon HD 4850 512MB

Intro

Compare all of that to the Radeon HD 4850 512MB, which uses a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 RAM runs at a speed of 993 MHz on this particular card. 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 240 GDDR5		70 Watts
Radeon HD 4850 512MB		110 Watts
	Difference: 40 Watts (57%)

Memory Bandwidth

In theory, the Radeon HD 4850 512MB will be 17% faster than the GeForce GT 240 GDDR5 overall, due to its higher bandwidth. (explain)

Radeon HD 4850 512MB		63552 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 9152 (17%)

Texel Rate

The Radeon HD 4850 512MB will be quite a bit (approximately 42%) more effective at anisotropic filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4850 512MB		25000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 7400 (42%)

Pixel Rate

The Radeon HD 4850 512MB is quite a bit (about 127%) more effective at FSAA than the GeForce GT 240 GDDR5, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon HD 4850 512MB		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 MB per second) that can be transferred across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are processed per second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.