GeForce 820M vs Radeon HD 4550 256MB

Intro

Compare all that to the Radeon HD 4550 256MB, which has a GPU core clock speed of 600 MHz, and 256 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also is comprised of 80(16x5) Stream Processors, 8 Texture Address Units, and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 820M		15 Watts
Radeon HD 4550 256MB		25 Watts
	Difference: 10 Watts (67%)

Memory Bandwidth

Theoretically speaking, the GeForce 820M should be 25% quicker than the Radeon HD 4550 256MB overall, because of its higher bandwidth. (explain)

GeForce 820M		16000 MB/sec
Radeon HD 4550 256MB		12800 MB/sec
	Difference: 3200 (25%)

Texel Rate

The GeForce 820M should be much (about 140%) faster with regards to AF than the Radeon HD 4550 256MB. (explain)

GeForce 820M		11504 Mtexels/sec
Radeon HD 4550 256MB		4800 Mtexels/sec
	Difference: 6704 (140%)

Pixel Rate

If using a high resolution is important to you, then the GeForce 820M is the winner, not by a very large margin though. (explain)

GeForce 820M		2876 Mpixels/sec
Radeon HD 4550 256MB		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 data (counted in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the video 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 maximum number of pixels that the graphics chip could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.