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Radeon R9 280 vs Radeon R9 295X2

Intro

The Radeon R9 280 has clock speeds of 933 MHz on the GPU, and 1250 MHz on the 3072 MB of GDDR5 memory. It features 1792 SPUs along with 112 Texture Address Units and 32 Rasterization Operator Units.

Compare all of that to the Radeon R9 295X2, which has a core clock speed of 1018 MHz and a GDDR5 memory speed of 1250 MHz. It also uses a 512-bit memory bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 TAUs, and 64 Raster Operation Units.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon R9 295X2 21205 points
Radeon R9 280 7961 points
Difference: 13244 (166%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 280 250 Watts
Radeon R9 295X2 500 Watts
Difference: 250 Watts (100%)

Memory Bandwidth

In theory, the Radeon R9 295X2 should be 167% quicker than the Radeon R9 280 overall, because of its higher bandwidth. (explain)

Radeon R9 295X2 640000 MB/sec
Radeon R9 280 240000 MB/sec
Difference: 400000 (167%)

Texel Rate

The Radeon R9 295X2 will be quite a bit (about 243%) faster with regards to anisotropic filtering than the Radeon R9 280. (explain)

Radeon R9 295X2 358336 Mtexels/sec
Radeon R9 280 104496 Mtexels/sec
Difference: 253840 (243%)

Pixel Rate

The Radeon R9 295X2 will be much (about 336%) faster with regards to full screen anti-aliasing than the Radeon R9 280, and should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 295X2 130304 Mpixels/sec
Radeon R9 280 29856 Mpixels/sec
Difference: 100448 (336%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon R9 280

Amazon.com

Check prices at:

Radeon R9 295X2

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 295X2
Manufacturer AMD AMD
Year March 2014 April 2014
Code Name Tahiti Pro Vesuvius
Memory 3072 MB 4096 MB (x2)
Core Speed 933 MHz 1018 MHz (x2)
Memory Speed 5000 MHz 5000 MHz (x2)
Power (Max TDP) 250 watts 500 watts
Bandwidth 240000 MB/sec 640000 MB/sec
Texel Rate 104496 Mtexels/sec 358336 Mtexels/sec
Pixel Rate 29856 Mpixels/sec 130304 Mpixels/sec
Unified Shaders 1792 2816 (x2)
Texture Mapping Units 112 176 (x2)
Render Output Units 32 64 (x2)
Bus Type GDDR5 GDDR5
Bus Width 384-bit 512-bit (x2)
Fab Process 28 nm 28 nm
Transistors 4313 million 6200 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 largest amount of data (measured in MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR type memory, the result should be multiplied by 2 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 anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units by the core clock 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 applied in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. 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 quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

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Radeon R9 280

Amazon.com

Check prices at:

Radeon R9 295X2

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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