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GeForce GT 315 vs Radeon R5 M255

Intro

The GeForce GT 315 comes with a clock frequency of 625 MHz and a DDR3 memory frequency of 790 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is comprised of 48 SPUs, 16 TAUs, and 8 ROPs.

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the GeForce GT 315 should in theory be a lot better than the Radeon R5 M255 in general. (explain)

GeForce GT 315 25280 MB/sec
Radeon R5 M255 16000 MB/sec
Difference: 9280 (58%)

Texel Rate

The Radeon R5 M255 will be quite a bit (approximately 88%) better at texture filtering than the GeForce GT 315. (explain)

Radeon R5 M255 18800 Mtexels/sec
GeForce GT 315 10000 Mtexels/sec
Difference: 8800 (88%)

Pixel Rate

If using a high resolution is important to you, then the Radeon R5 M255 is the winner, and very much so. (explain)

Radeon R5 M255 7520 Mpixels/sec
GeForce GT 315 5000 Mpixels/sec
Difference: 2520 (50%)

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 GT 315

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 GT 315 Radeon R5 M255
Manufacturer nVidia AMD
Year November 2009 June 2014
Code Name GT216 Jet Pro
Memory 512 MB 2048 MB
Core Speed 625 MHz 940 MHz
Memory Speed 1580 MHz 2000 MHz
Power (Max TDP) 52 watts (Unknown) watts
Bandwidth 25280 MB/sec 16000 MB/sec
Texel Rate 10000 Mtexels/sec 18800 Mtexels/sec
Pixel Rate 5000 Mpixels/sec 7520 Mpixels/sec
Unified Shaders 48 320
Texture Mapping Units 16 20
Render Output Units 8 8
Bus Type DDR3 DDR3
Bus Width 128-bit 64-bit
Fab Process 40 nm 28 nm
Transistors 486 million (Unknown) million
Bus PCIe 2.0 PCIe 3.0 x8
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the card's bus width by its memory 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 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 texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Raster Operations Pipelines by the the core 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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GeForce GT 315

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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