GeForce 820M vs Radeon HD 4550 512MB

Intro

Compare all of that to the Radeon HD 4550 512MB, which comes with clock speeds of 600 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 RAM. It features 80(16x5) SPUs as well as 8 TAUs and 4 Rasterization Operator 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

Theoretically speaking, the GeForce 820M should be a lot faster than the Radeon HD 4550 512MB in general. (explain)

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

Texel Rate

The GeForce 820M is quite a bit (approximately 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

If using a high resolution is important to you, then the GeForce 820M is superior to the Radeon HD 4550 512MB, not by a very large margin though. (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 maximum amount of data (in units of megabytes per second) that can be moved past the external memory interface in one second. It is worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better 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 amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core clock 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 applied per second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.