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GeForce GTX Titan vs Radeon R9 M265X

Intro

The GeForce GTX Titan comes with a GPU core speed of 837 MHz, and the 6144 MB of GDDR5 RAM is set to run at 1502 MHz through a 384-bit bus. It also features 2688 SPUs, 224 Texture Address Units, and 48 Raster Operation Units.

Compare all of that to the Radeon R9 M265X, which has GPU core 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 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX Titan should perform a lot faster than the Radeon R9 M265X overall. (explain)

GeForce GTX Titan 288384 MB/sec
Radeon R9 M265X 72000 MB/sec
Difference: 216384 (301%)

Texel Rate

The GeForce GTX Titan should be much (more or less 715%) more effective at anisotropic filtering than the Radeon R9 M265X. (explain)

GeForce GTX Titan 187488 Mtexels/sec
Radeon R9 M265X 23000 Mtexels/sec
Difference: 164488 (715%)

Pixel Rate

The GeForce GTX Titan is a lot (about 337%) better at FSAA than the Radeon R9 M265X, and also should be able to handle higher resolutions more effectively. (explain)

GeForce GTX Titan 40176 Mpixels/sec
Radeon R9 M265X 9200 Mpixels/sec
Difference: 30976 (337%)

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 Titan

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

Display Specifications

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Model GeForce GTX Titan Radeon R9 M265X
Manufacturer nVidia AMD
Year February 2013 May 1 2014
Code Name GK110 Venus Pro
Memory 6144 MB 2048 MB
Core Speed 837 MHz 575 MHz
Memory Speed 6008 MHz 4500 MHz
Power (Max TDP) 250 watts (Unknown) watts
Bandwidth 288384 MB/sec 72000 MB/sec
Texel Rate 187488 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 40176 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 2688 640
Texture Mapping Units 224 40
Render Output Units 48 16
Bus Type GDDR5 GDDR5
Bus Width 384-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 7080 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (in units of MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, 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 the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce GTX Titan

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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