GeForce 825M vs Radeon HD 5570

Intro

Compare those specifications to the Radeon HD 5570, which uses a 40 nm design. AMD has set the core frequency at 650 MHz. The DDR3 RAM works at a frequency of 900 MHz on this particular card. It features 400(80x5) SPUs along with 20 Texture Address Units and 8 ROPs.

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

Theoretically, the Radeon HD 5570 should be quite a bit faster than the GeForce 825M in general. (explain)

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

Texel Rate

The GeForce 825M is a little bit (approximately 5%) faster with regards to AF than the Radeon HD 5570. (explain)

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

Pixel Rate

If using high levels of AA is important to you, then the GeForce 825M is a better choice, by far. (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 max amount of information (counted in MB per second) that can be transferred over the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant 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 maximum fill rate.