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GeForce GTX 870M vs Radeon HD 7790

Intro

The GeForce GTX 870M features core speeds of 941 MHz on the GPU, and 1000 MHz on the 3072 MB of GDDR5 memory. It features 1344 SPUs along with 112 Texture Address Units and 24 Rasterization Operator Units.

Compare all that to the Radeon HD 7790, which comes with core speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 memory. It features 896 SPUs along with 56 Texture Address Units and 16 ROPs.

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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

GeForce GTX 870M 4770 points
Radeon HD 7790 4330 points
Difference: 440 (10%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
GeForce GTX 870M 110 Watts
Difference: 25 Watts (29%)

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should have the same performance. (explain)

Texel Rate

The GeForce GTX 870M should be quite a bit (approximately 88%) more effective at AF than the Radeon HD 7790. (explain)

GeForce GTX 870M 105392 Mtexels/sec
Radeon HD 7790 56000 Mtexels/sec
Difference: 49392 (88%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 870M is a better choice, by a large margin. (explain)

GeForce GTX 870M 22584 Mpixels/sec
Radeon HD 7790 16000 Mpixels/sec
Difference: 6584 (41%)

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

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GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 7790

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model GeForce GTX 870M Radeon HD 7790
Manufacturer nVidia AMD
Year March 12 2014 March 2013
Code Name GK104 Bonaire XT
Memory 3072 MB 1024 MB
Core Speed 941 MHz 1000 MHz
Memory Speed 4000 MHz 6000 MHz
Power (Max TDP) 110 watts 85 watts
Bandwidth 96000 MB/sec 96000 MB/sec
Texel Rate 105392 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 22584 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 1344 896
Texture Mapping Units 112 56
Render Output Units 24 16
Bus Type GDDR5 GDDR5
Bus Width 192-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.1
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (in units of MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel 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 get to the max fill rate.

Display Prices

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GeForce GTX 870M

Amazon.com

Check prices at:

Radeon HD 7790

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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