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GeForce GTX 880M vs Radeon R9 M265X

Intro

The GeForce GTX 880M features clock speeds of 954 MHz on the GPU, and 1000 MHz on the 4096 MB of GDDR5 memory. It features 1536 SPUs as well as 128 TAUs and 32 ROPs.

Compare those specifications to the Radeon R9 M265X, which features GPU clock speed of 575 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also features 640 SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GTX 880M should in theory be a lot superior to the Radeon R9 M265X overall. (explain)

GeForce GTX 880M 128000 MB/sec
Radeon R9 M265X 72000 MB/sec
Difference: 56000 (78%)

Texel Rate

The GeForce GTX 880M will be a lot (more or less 431%) better at texture filtering than the Radeon R9 M265X. (explain)

GeForce GTX 880M 122112 Mtexels/sec
Radeon R9 M265X 23000 Mtexels/sec
Difference: 99112 (431%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 880M is superior to the Radeon R9 M265X, by a large margin. (explain)

GeForce GTX 880M 30528 Mpixels/sec
Radeon R9 M265X 9200 Mpixels/sec
Difference: 21328 (232%)

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

Check prices at:

Radeon R9 M265X

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 880M Radeon R9 M265X
Manufacturer nVidia AMD
Year March 12 2014 May 1 2014
Code Name GK104 Venus Pro
Memory 4096 MB 2048 MB
Core Speed 954 MHz 575 MHz
Memory Speed 4000 MHz 4500 MHz
Power (Max TDP) 130 watts (Unknown) watts
Bandwidth 128000 MB/sec 72000 MB/sec
Texel Rate 122112 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 30528 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 1536 640
Texture Mapping Units 128 40
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 12 DirectX 11.2
OpenGL Version OpenGL 4.5 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transferred past the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one 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. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 880M

Amazon.com

Check prices at:

Radeon R9 M265X

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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