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GeForce GTX 460 1GB vs Radeon R5 M255

Intro

The GeForce GTX 460 1GB comes with a clock frequency of 675 MHz and a GDDR5 memory speed of 900 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It is comprised of 336 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

Compare all that to the Radeon R5 M255, which features a clock frequency of 940 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GTX 460 1GB, in theory, should be a lot faster than the Radeon R5 M255 in general. (explain)

GeForce GTX 460 1GB 115200 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 99200 (620%)

Texel Rate

The GeForce GTX 460 1GB should be quite a bit (approximately 101%) more effective at anisotropic filtering than the Radeon R5 M255. (explain)

GeForce GTX 460 1GB 37800 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 19000 (101%)

Pixel Rate

The GeForce GTX 460 1GB will be a lot (approximately 187%) more effective at FSAA than the Radeon R5 M255, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

GeForce GTX 460 1GB 21600 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 14080 (187%)

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 460 1GB

Amazon.com

Check prices at:

Radeon R5 M255

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 460 1GB Radeon R5 M255
Manufacturer nVidia AMD
Year July 2010 June 2014
Code Name GF104 Jet Pro
Memory 1024 MB 2048 MB
Core Speed 675 MHz 940 MHz
Memory Speed 3600 MHz 2000 MHz
Power (Max TDP) 160 watts (Unknown) watts
Bandwidth 115200 MB/sec 16000 MB/sec
Texel Rate 37800 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 336 320
Texture Mapping Units 56 20
Render Output Units 32 8
Bus Type GDDR5 DDR3
Bus Width 256-bit 64-bit
Fab Process 40 nm 28 nm
Transistors 1950 million (Unknown) million
Bus PCIe x16 PCIe 3.0 x8
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the max amount of data (in units of megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the 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 applied per second. This number is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The better the texel rate, the better the video card will be at 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 the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce GTX 460 1GB

Amazon.com

Check prices at:

Radeon R5 M255

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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