GeForce 920M vs Radeon HD 5770

Intro

Compare all of that to the Radeon HD 5770, which comes with GPU clock speed of 850 MHz, and 1024 MB of GDDR5 memory set to run at 1200 MHz through a 128-bit bus. It also features 800(160x5) Stream Processors, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 5770, in theory, should be quite a bit faster than the GeForce 920M in general. (explain)

Radeon HD 5770		76800 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 62400 (433%)

Texel Rate

The Radeon HD 5770 will be a small bit (approximately 11%) more effective at anisotropic filtering than the GeForce 920M. (explain)

Radeon HD 5770		34000 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 3472 (11%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 5770 is superior to the GeForce 920M, by far. (explain)

Radeon HD 5770		13600 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 5968 (78%)

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 information (measured in MB per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines 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, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.