GeForce 8400 GS 512MB vs Radeon HD 5570

Intro

Compare those specs to the Radeon HD 5570, which comes with a core clock speed of 650 MHz and a DDR3 memory frequency of 900 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 400(80x5) SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 8400 GS 512MB		40 Watts
Radeon HD 5570		43 Watts
	Difference: 3 Watts (8%)

Memory Bandwidth

The Radeon HD 5570 should theoretically perform a lot faster than the GeForce 8400 GS 512MB in general. (explain)

Radeon HD 5570		28800 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 22400 (350%)

Texel Rate

The Radeon HD 5570 is much (approximately 150%) more effective at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

Radeon HD 5570		13000 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 7800 (150%)

Pixel Rate

The Radeon HD 5570 will be quite a bit (about 100%) faster with regards to FSAA than the GeForce 8400 GS 512MB, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 5570		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 max amount of data (counted in megabytes per second) that can be transported past the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the 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 amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.