GeForce 820M vs Radeon HD 4550 512MB

Intro

Compare all that to the Radeon HD 4550 512MB, which comes with a core clock speed of 600 MHz and a GDDR3 memory frequency of 800 MHz. It also makes use of a 64-bit bus, and uses 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)

GeForce 820M		15 Watts
Radeon HD 4550 512MB		25 Watts
	Difference: 10 Watts (67%)

Memory Bandwidth

In theory, the GeForce 820M should be 25% faster than the Radeon HD 4550 512MB in general, due to its greater data rate. (explain)

GeForce 820M		16000 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 3200 (25%)

Texel Rate

The GeForce 820M will be a lot (more or less 140%) better at AF than the Radeon HD 4550 512MB. (explain)

GeForce 820M		11504 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 6704 (140%)

Pixel Rate

The GeForce 820M is just a bit (more or less 20%) better at AA than the Radeon HD 4550 512MB, and will be able to handle higher screen resolutions better. (explain)

GeForce 820M		2876 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 476 (20%)

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 information (in units of megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.