GeForce GT 240 GDDR5 vs Radeon HD 4670 1GB

Intro

Compare those specs to the Radeon HD 4670 1GB, which features core speeds of 750 MHz on the GPU, and 1100 MHz on the 1024 MB of GDDR4/GDDR3/DDR3/DDR2 memory. It features 320(64x5) SPUs along with 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, in theory, should perform much faster than the Radeon HD 4670 1GB in general. (explain)

GeForce GT 240 GDDR5		54400 MB/sec
Radeon HD 4670 1GB		35200 MB/sec
	Difference: 19200 (55%)

Texel Rate

The Radeon HD 4670 1GB will be quite a bit (about 36%) more effective at anisotropic filtering than the GeForce GT 240 GDDR5. (explain)

Radeon HD 4670 1GB		24000 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 6400 (36%)

Pixel Rate

The Radeon HD 4670 1GB will be quite a bit (about 36%) better at anti-aliasing than the GeForce GT 240 GDDR5, and also will be capable of handling higher screen resolutions better. (explain)

Radeon HD 4670 1GB		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 largest amount of information (measured in megabytes per second) that can be transported across the external memory interface within a second. The number is worked out by multiplying the 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 4 instead. The better the card's memory bandwidth, 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 per second. This is worked out by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.