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GeForce GTX 650 Ti vs Radeon R5 M255

Intro

The GeForce GTX 650 Ti makes use of a 28 nm design. nVidia has set the core speed at 928 MHz. The GDDR5 RAM works at a speed of 1350 MHz on this specific card. It features 768 SPUs along with 64 TAUs and 16 Rasterization Operator Units.

Compare those specs to the Radeon R5 M255, which comes with a core clock frequency of 940 MHz and a DDR3 memory frequency of 1000 MHz. It also uses a 64-bit memory bus, and makes use of a 28 nm design. It is made up of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the GeForce GTX 650 Ti should perform much faster than the Radeon R5 M255 overall. (explain)

GeForce GTX 650 Ti 86400 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 70400 (440%)

Texel Rate

The GeForce GTX 650 Ti is quite a bit (about 216%) more effective at texture filtering than the Radeon R5 M255. (explain)

GeForce GTX 650 Ti 59392 Mtexels/sec
Radeon R5 M255 18800 Mtexels/sec
Difference: 40592 (216%)

Pixel Rate

The GeForce GTX 650 Ti will be a lot (more or less 97%) better at full screen anti-aliasing than the Radeon R5 M255, and should be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GTX 650 Ti 14848 Mpixels/sec
Radeon R5 M255 7520 Mpixels/sec
Difference: 7328 (97%)

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 650 Ti

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 650 Ti Radeon R5 M255
Manufacturer nVidia AMD
Year October 2012 June 2014
Code Name GK106 Jet Pro
Memory 1024 MB 2048 MB
Core Speed 928 MHz 940 MHz
Memory Speed 5400 MHz 2000 MHz
Power (Max TDP) 110 watts (Unknown) watts
Bandwidth 86400 MB/sec 16000 MB/sec
Texel Rate 59392 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 14848 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 768 320
Texture Mapping Units 64 20
Render Output Units 16 8
Bus Type GDDR5 DDR3
Bus Width 128-bit 64-bit
Fab Process 28 nm 28 nm
Transistors 2540 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x8
DirectX Version DirectX 11.0 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the bus width by the speed of its memory. In the case of DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This figure 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 number of pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 650 Ti

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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