GeForce 920M vs Radeon HD 4670 1GB

Intro

Compare all of that to the Radeon HD 4670 1GB, which comes with a core clock frequency of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1100 MHz. It also features a 128-bit bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 4670 1GB should be quite a bit faster than the GeForce 920M in general. (explain)

Radeon HD 4670 1GB		35200 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 20800 (144%)

Texel Rate

The GeForce 920M should be a lot (approximately 27%) faster with regards to AF than the Radeon HD 4670 1GB. (explain)

GeForce 920M		30528 Mtexels/sec
Radeon HD 4670 1GB		24000 Mtexels/sec
	Difference: 6528 (27%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce 920M is a better choice, by far. (explain)

GeForce 920M		7632 Mpixels/sec
Radeon HD 4670 1GB		6000 Mpixels/sec
	Difference: 1632 (27%)

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 maximum amount of information (measured in megabytes per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a 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 figure is calculated by multiplying the amount 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.