GeForce GTX 870M vs Radeon HD 7850

Intro

Compare those specifications to the Radeon HD 7850, which has core speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 memory. It features 1024 SPUs along with 64 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 7850		5200 points
GeForce GTX 870M		4770 points
	Difference: 430 (9%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 870M		110 Watts
Radeon HD 7850		130 Watts
	Difference: 20 Watts (18%)

Memory Bandwidth

The Radeon HD 7850, in theory, should perform quite a bit faster than the GeForce GTX 870M in general. (explain)

Radeon HD 7850		153600 MB/sec
GeForce GTX 870M		96000 MB/sec
	Difference: 57600 (60%)

Texel Rate

The GeForce GTX 870M should be quite a bit (approximately 91%) more effective at AF than the Radeon HD 7850. (explain)

GeForce GTX 870M		105392 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 50352 (91%)

Pixel Rate

The Radeon HD 7850 should be a lot (approximately 22%) faster with regards to FSAA than the GeForce GTX 870M, and also will be capable of handling higher screen resolutions while still performing well. (explain)

Radeon HD 7850		27520 Mpixels/sec
GeForce GTX 870M		22584 Mpixels/sec
	Difference: 4936 (22%)

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 (measured in megabytes per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.