GeForce 8400 GS 512MB vs Radeon HD 6570 (OEM) 1GB

Intro

Compare all of that to the Radeon HD 6570 (OEM) 1GB, which features a core clock speed of 650 MHz and a GDDR3 memory frequency of 900 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It features 480 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Radeon HD 6570 (OEM) 1GB		50 Watts
	Difference: 10 Watts (25%)

Memory Bandwidth

As far as performance goes, the Radeon HD 6570 (OEM) 1GB should theoretically be a lot better than the GeForce 8400 GS 512MB in general. (explain)

Radeon HD 6570 (OEM) 1GB		28800 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 22400 (350%)

Texel Rate

The Radeon HD 6570 (OEM) 1GB should be quite a bit (more or less 200%) more effective at texture filtering than the GeForce 8400 GS 512MB. (explain)

Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 10400 (200%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6570 (OEM) 1GB is superior to the GeForce 8400 GS 512MB, by far. (explain)

Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 2600 (100%)

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 maximum amount of data (counted in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This 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 processed per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also 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, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.