GeForce 920M vs Radeon HD 7870

Intro

Compare all that to the Radeon HD 7870, which makes use of a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM works at a frequency of 1200 MHz on this specific model. It features 1280 SPUs as well as 80 TAUs 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 7870		6230 points
GeForce 920M		1180 points
	Difference: 5050 (428%)

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 7870 should perform quite a bit faster than the GeForce 920M overall. (explain)

Radeon HD 7870		153600 MB/sec
GeForce 920M		14400 MB/sec
	Difference: 139200 (967%)

Texel Rate

The Radeon HD 7870 should be much (about 162%) better at anisotropic filtering than the GeForce 920M. (explain)

Radeon HD 7870		80000 Mtexels/sec
GeForce 920M		30528 Mtexels/sec
	Difference: 49472 (162%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 7870 is superior to the GeForce 920M, by far. (explain)

Radeon HD 7870		32000 Mpixels/sec
GeForce 920M		7632 Mpixels/sec
	Difference: 24368 (319%)

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 (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.