GeForce GTX 870M vs Radeon HD 7850

Intro

Compare that to the Radeon HD 7850, which features a clock frequency of 860 MHz and a GDDR5 memory speed of 1200 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It features 1024 SPUs, 64 TAUs, and 32 ROPs.

Display Graphs

Hide Graphs

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

Performance-wise, the Radeon HD 7850 should in theory be quite a bit better than the GeForce GTX 870M overall. (explain)

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

Texel Rate

The GeForce GTX 870M should be much (about 91%) faster with regards to texture filtering 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 is a lot (more or less 22%) faster with regards to anti-aliasing than the GeForce GTX 870M, and also capable of handling higher resolutions better. (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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported over the external memory interface in a second. It's calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied per second. This figure is calculated 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 video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.