GeForce 920M vs Radeon HD 7970

Intro

Compare those specifications to the Radeon HD 7970, which comes with core clock speeds of 925 MHz on the GPU, and 1375 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

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

In theory, the Radeon HD 7970 will be 1733% faster than the GeForce 920M in general, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon HD 7970 should be quite a bit (about 288%) faster with regards to AF than the GeForce 920M. (explain)

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

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7970 is superior to the GeForce 920M, and very much so. (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: Bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the graphics 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 graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the clock 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 is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.