GeForce 930M vs Radeon HD 4550 512MB

Intro

Compare that to the Radeon HD 4550 512MB, which features a core clock speed of 600 MHz and a GDDR3 memory speed of 800 MHz. It also uses a 64-bit bus, and makes use of a 55 nm design. It is made up of 80(16x5) SPUs, 8 Texture Address Units, and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce 930M should theoretically be just a bit superior to the Radeon HD 4550 512MB in general. (explain)

GeForce 930M		14400 MB/sec
Radeon HD 4550 512MB		12800 MB/sec
	Difference: 1600 (13%)

Texel Rate

The GeForce 930M should be quite a bit (about 364%) faster with regards to anisotropic filtering than the Radeon HD 4550 512MB. (explain)

GeForce 930M		22272 Mtexels/sec
Radeon HD 4550 512MB		4800 Mtexels/sec
	Difference: 17472 (364%)

Pixel Rate

The GeForce 930M is a lot (about 209%) more effective at anti-aliasing than the Radeon HD 4550 512MB, and will be capable of handling higher resolutions better. (explain)

GeForce 930M		7424 Mpixels/sec
Radeon HD 4550 512MB		2400 Mpixels/sec
	Difference: 5024 (209%)

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 max amount of information (in units of megabytes per second) that can be moved across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 are processed in one second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

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