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GeForce GTX 880M vs Radeon R9 285

Intro

The GeForce GTX 880M features a clock frequency of 954 MHz and a GDDR5 memory frequency of 1000 MHz. It also uses a 256-bit bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 Texture Address Units, and 32 ROPs.

Compare those specs to the Radeon R9 285, which features core clock speeds of 918 MHz on the GPU, and 1375 MHz on the 2048 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 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

Radeon R9 285 8500 points
GeForce GTX 880M 6360 points
Difference: 2140 (34%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 880M 130 Watts
Radeon R9 285 190 Watts
Difference: 60 Watts (46%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 285 will be 38% faster than the GeForce GTX 880M overall, because of its greater data rate. (explain)

Radeon R9 285 176000 MB/sec
GeForce GTX 880M 128000 MB/sec
Difference: 48000 (38%)

Texel Rate

The GeForce GTX 880M should be a small bit (more or less 19%) more effective at texture filtering than the Radeon R9 285. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon R9 285 102816 Mtexels/sec
Difference: 19296 (19%)

Pixel Rate

The GeForce GTX 880M will be a bit (about 4%) better at full screen anti-aliasing than the Radeon R9 285, and also should be capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon R9 285 29376 Mpixels/sec
Difference: 1152 (4%)

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 880M

Amazon.com

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Radeon R9 285

Amazon.com

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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 880M Radeon R9 285
Manufacturer nVidia AMD
Year March 12 2014 September 2014
Code Name GK104 Tonga PRO
Memory 4096 MB 2048 MB
Core Speed 954 MHz 918 MHz
Memory Speed 4000 MHz 5500 MHz
Power (Max TDP) 130 watts 190 watts
Bandwidth 128000 MB/sec 176000 MB/sec
Texel Rate 122112 Mtexels/sec 102816 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 29376 Mpixels/sec
Unified Shaders 1536 1792
Texture Mapping Units 128 112
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million 5000 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 12.0
OpenGL Version OpenGL 4.5 OpenGL 4.4

Memory Bandwidth: Bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially 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 880M

Amazon.com

Check prices at:

Radeon R9 285

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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