GeForce GT 240 GDDR5 vs Radeon HD 4670 512MB

Intro

Compare that to the Radeon HD 4670 512MB, which comes with GPU core speed of 750 MHz, and 512 MB of GDDR4/GDDR3/DDR3/DDR2 memory set to run at 1000 MHz through a 128-bit bus. It also features 320(64x5) SPUs, 32 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The GeForce GT 240 GDDR5 should theoretically perform quite a bit faster than the Radeon HD 4670 512MB in general. (explain)

GeForce GT 240 GDDR5		54400 MB/sec
Radeon HD 4670 512MB		32000 MB/sec
	Difference: 22400 (70%)

Texel Rate

The Radeon HD 4670 512MB is quite a bit (approximately 36%) faster with regards to texture filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4670 512MB		24000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 6400 (36%)

Pixel Rate

The Radeon HD 4670 512MB should be a lot (approximately 36%) faster with regards to AA than the GeForce GT 240 GDDR5, and able to handle higher screen resolutions without slowing down too much. (explain)

Radeon HD 4670 512MB		6000 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 1600 (36%)

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 max amount of information (measured in megabytes per second) that can be moved across the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 number of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount 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 drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.