GeForce 825M vs Radeon HD 5570

Intro

Compare that to the Radeon HD 5570, which has clock speeds of 650 MHz on the GPU, and 900 MHz on the 512 MB of DDR3 memory. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 825M		33 Watts
Radeon HD 5570		43 Watts
	Difference: 10 Watts (30%)

Memory Bandwidth

In theory, the Radeon HD 5570 is 100% faster than the GeForce 825M in general, due to its higher data rate. (explain)

Radeon HD 5570		28800 MB/sec
GeForce 825M		14400 MB/sec
	Difference: 14400 (100%)

Texel Rate

The GeForce 825M will be a small bit (more or less 5%) more effective at texture filtering than the Radeon HD 5570. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 5570		13000 Mtexels/sec
	Difference: 600 (5%)

Pixel Rate

The GeForce 825M should be a lot (more or less 31%) more effective at full screen anti-aliasing than the Radeon HD 5570, and also able to handle higher screen resolutions more effectively. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 5570		5200 Mpixels/sec
	Difference: 1600 (31%)

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 (in units of MB per second) that can be transferred past the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total 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 in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out 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 filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.