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Radeon HD 7870 XT vs Radeon R9 M295X

Intro

The Radeon HD 7870 XT has core speeds of 925 MHz on the GPU, and 1500 MHz on the 2048 MB of GDDR5 RAM. It features 1536 SPUs along with 96 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has set the core speed at 750 MHz. The GDDR5 RAM works at a speed of 1375 MHz on this specific card. It features 2048 SPUs as well as 128 TAUs and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X 125 Watts
Radeon HD 7870 XT 185 Watts
Difference: 60 Watts (48%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 XT will be 9% quicker than the Radeon R9 M295X overall, because of its greater bandwidth. (explain)

Radeon HD 7870 XT 192000 MB/sec
Radeon R9 M295X 176000 MB/sec
Difference: 16000 (9%)

Texel Rate

The Radeon R9 M295X will be just a bit (about 8%) faster with regards to anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon R9 M295X 96000 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 7200 (8%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 7870 XT is the winner, and very much so. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
Radeon R9 M295X 24000 Mpixels/sec
Difference: 5600 (23%)

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 HD 7870 XT

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.

Specifications

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Model Radeon HD 7870 XT Radeon R9 M295X
Manufacturer AMD AMD
Year November 2012 2014
Code Name Tahiti LE Unknown
Memory 2048 MB 4096 MB
Core Speed 925 MHz 750 MHz
Memory Speed 6000 MHz 5500 MHz
Power (Max TDP) 185 watts 125 watts
Bandwidth 192000 MB/sec 176000 MB/sec
Texel Rate 88800 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 1536 2048
Texture Mapping Units 96 128
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-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 11.1 DirectX 11.2
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of MB per second) that can be transferred across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. If it uses 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 AA, High Dynamic Range and high 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 texture units by the core speed of the chip. The higher this number, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of 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

Hide Prices

Radeon HD 7870 XT

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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