GeForce 920M vs Radeon HD 6770 1GB

Intro

Compare all that to the Radeon HD 6770 1GB, which has a core clock frequency of 900 MHz and a GDDR5 memory speed of 1050 MHz. It also makes use of a 128-bit memory bus, and uses a 40 nm design. It features 800 SPUs, 40 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 6770 1GB should theoretically be quite a bit faster than the GeForce 920M overall. (explain)

Radeon HD 6770 1GB		67200 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 52800 (367%)

Texel Rate

The Radeon HD 6770 1GB is a little bit (approximately 18%) faster with regards to anisotropic filtering than the GeForce 920M. (explain)

Radeon HD 6770 1GB		36000 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 5472 (18%)

Pixel Rate

The Radeon HD 6770 1GB should be a lot (approximately 89%) more effective at anti-aliasing than the GeForce 920M, and also should be capable of handling higher screen resolutions better. (explain)

Radeon HD 6770 1GB		14400 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 6768 (89%)

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: Memory bandwidth is the largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It's worked out by multiplying the interface width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total texture units of the card by the core clock 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 the video card could possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.