GeForce 920M vs Radeon HD 7970

Intro

Compare all of that to the Radeon HD 7970, which features a clock speed of 925 MHz and a GDDR5 memory frequency of 1375 MHz. It also uses a 384-bit memory bus, and uses a 28 nm design. It is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7970		8225 points
GeForce 920M		1180 points
	Difference: 7045 (597%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon HD 7970, in theory, should perform a lot faster than the GeForce 920M in general. (explain)

Radeon HD 7970		264000 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 249600 (1733%)

Texel Rate

The Radeon HD 7970 is a lot (more or less 288%) more effective at AF than the GeForce 920M. (explain)

Radeon HD 7970		118400 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 87872 (288%)

Pixel Rate

The Radeon HD 7970 should be quite a bit (more or less 288%) more effective at FSAA than the GeForce 920M, and also capable of handling higher resolutions while still performing well. (explain)

Radeon HD 7970		29600 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 21968 (288%)

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 max amount of data (counted in MB per second) that can be moved past the external memory interface in a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's 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 applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory per 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 - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.