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Radeon HD 7870 XT vs Radeon R9 M295X

Intro

The Radeon HD 7870 XT comes with a core clock speed of 925 MHz and a GDDR5 memory speed of 1500 MHz. It also features a 256-bit memory bus, and uses a 28 nm design. It is comprised of 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon R9 M295X, which has GPU core speed of 750 MHz, and 4096 MB of GDDR5 memory set to run at 1375 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

Display Graphs

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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

The Radeon HD 7870 XT, in theory, should be a small bit faster than the Radeon R9 M295X in general. (explain)

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

Texel Rate

The Radeon R9 M295X is a bit (approximately 8%) more effective at texture 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

The Radeon HD 7870 XT should be a lot (approximately 23%) more effective at FSAA than the Radeon R9 M295X, and also will be able to handle higher resolutions more effectively. (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: Bandwidth is the max amount of information (counted in megabytes per second) that can be moved over the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 are applied in one second. This figure is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write 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 filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max 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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