GeForce 825M vs Radeon HD 4550 512MB

Intro

Compare those specifications to the Radeon HD 4550 512MB, which has a core clock frequency of 600 MHz and a GDDR3 memory speed of 800 MHz. It also features a 64-bit memory bus, and makes use of a 55 nm design. It features 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4550 512MB		25 Watts
GeForce 825M		33 Watts
	Difference: 8 Watts (32%)

Memory Bandwidth

In theory, the GeForce 825M will be 13% faster than the Radeon HD 4550 512MB in general, because of its greater data rate. (explain)

GeForce 825M		14400 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 825M will be quite a bit (about 183%) faster with regards to texture filtering than the Radeon HD 4550 512MB. (explain)

GeForce 825M		13600 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 8800 (183%)

Pixel Rate

The GeForce 825M should be quite a bit (more or less 183%) more effective at anti-aliasing than the Radeon HD 4550 512MB, and also able to handle higher screen resolutions better. (explain)

GeForce 825M		6800 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 4400 (183%)

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 largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher 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 texture map elements (texels) that can be applied per second. This is worked out by multiplying the total number of texture units of the card by the core clock 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 maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. 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 memory bandwidth is, the lower the ability to get to the maximum fill rate.