GeForce 8400 GS 512MB vs Radeon R5 M255

Intro

Compare those specs to the Radeon R5 M255, which features core clock speeds of 940 MHz on the GPU, and 1000 MHz on the 2048 MB of DDR3 memory. It features 320 SPUs as well as 20 Texture Address Units and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon R5 M255 will be 150% quicker than the GeForce 8400 GS 512MB in general, because of its greater data rate. (explain)

Radeon R5 M255		16000 MB/sec
GeForce 8400 GS 512MB		6400 MB/sec
	Difference: 9600 (150%)

Texel Rate

The Radeon R5 M255 should be quite a bit (approximately 262%) better at anisotropic filtering than the GeForce 8400 GS 512MB. (explain)

Radeon R5 M255		18800 Mtexels/sec
GeForce 8400 GS 512MB		5200 Mtexels/sec
	Difference: 13600 (262%)

Pixel Rate

The Radeon R5 M255 will be quite a bit (about 189%) faster with regards to full screen anti-aliasing than the GeForce 8400 GS 512MB, and should be able to handle higher screen resolutions without losing too much performance. (explain)

Radeon R5 M255		7520 Mpixels/sec
GeForce 8400 GS 512MB		2600 Mpixels/sec
	Difference: 4920 (189%)

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 MB per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, 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 amount of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.