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Radeon R9 280 vs Radeon R9 M295X

Intro

The Radeon R9 280 uses a 28 nm design. AMD has clocked the core frequency at 933 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this specific card. It features 1792 SPUs along with 112 Texture Address Units and 32 ROPs.

Compare that to the Radeon R9 M295X, which features core clock speeds of 750 MHz on the GPU, and 1375 MHz on the 4096 MB of GDDR5 RAM. It features 2048 SPUs along with 128 Texture Address Units and 32 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X 125 Watts
Radeon R9 280 250 Watts
Difference: 125 Watts (100%)

Memory Bandwidth

Performance-wise, the Radeon R9 280 should theoretically be quite a bit better than the Radeon R9 M295X in general. (explain)

Radeon R9 280 240000 MB/sec
Radeon R9 M295X 176000 MB/sec
Difference: 64000 (36%)

Texel Rate

The Radeon R9 280 should be just a bit (approximately 9%) more effective at anisotropic filtering than the Radeon R9 M295X. (explain)

Radeon R9 280 104496 Mtexels/sec
Radeon R9 M295X 96000 Mtexels/sec
Difference: 8496 (9%)

Pixel Rate

The Radeon R9 280 is a lot (approximately 24%) better at full screen anti-aliasing than the Radeon R9 M295X, and able to handle higher screen resolutions while still performing well. (explain)

Radeon R9 280 29856 Mpixels/sec
Radeon R9 M295X 24000 Mpixels/sec
Difference: 5856 (24%)

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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Radeon R9 280

Amazon.com

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Radeon R9 M295X

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 Radeon R9 280 Radeon R9 M295X
Manufacturer AMD AMD
Year March 2014 2014
Code Name Tahiti Pro Unknown
Memory 3072 MB 4096 MB
Core Speed 933 MHz 750 MHz
Memory Speed 5000 MHz 5500 MHz
Power (Max TDP) 250 watts 125 watts
Bandwidth 240000 MB/sec 176000 MB/sec
Texel Rate 104496 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 29856 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1792 2048
Texture Mapping Units 112 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 4313 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR 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 worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core 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 is also dependant on many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon R9 280

Amazon.com

Check prices at:

Radeon R9 M295X

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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