GeForce 825M vs Radeon HD 5450

Intro

Compare those specs to the Radeon HD 5450, which features GPU clock speed of 650 MHz, and 512 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also features 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450		19 Watts
GeForce 825M		33 Watts
	Difference: 14 Watts (74%)

Memory Bandwidth

In theory, the GeForce 825M is 13% faster than the Radeon HD 5450 in general, due to its greater data rate. (explain)

GeForce 825M		14400 MB/sec
Radeon HD 5450		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M is much (about 162%) more effective at anisotropic filtering than the Radeon HD 5450. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 5450		5200 Mtexels/sec
	Difference: 8400 (162%)

Pixel Rate

The GeForce 825M should be quite a bit (about 162%) better at AA than the Radeon HD 5450, and capable of handling higher screen resolutions better. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 5450		2600 Mpixels/sec
	Difference: 4200 (162%)

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: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses 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 can be 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 video 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 that the graphics chip can possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the the core 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 rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.