GeForce 9400 GT 256MB vs Radeon HD 6570 (OEM) 2GB

Intro

Compare those specs to the Radeon HD 6570 (OEM) 2GB, which features core clock speeds of 650 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs along with 24 TAUs and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

As far as performance goes, the Radeon HD 6570 (OEM) 2GB should in theory be quite a bit superior to the GeForce 9400 GT 256MB overall. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB should be quite a bit (about 255%) more effective at anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 11200 (255%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB should be much (more or less 136%) faster with regards to AA than the GeForce 9400 GT 256MB, and will be capable of handling higher screen resolutions without slowing down too much. (explain)

Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 3000 (136%)

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 MB 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. In the case of DDR memory, it must be multiplied by 2 once again. If 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the card will be at 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 that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour 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 quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.