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Radeon HD 4870 2GB vs Radeon R9 M295X

Intro

The Radeon HD 4870 2GB uses a 55 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 RAM is set to run at a speed of 900 MHz on this specific model. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 ROPs.

Compare those specs to the Radeon R9 M295X, which makes use of a 28 nm design. AMD has set the core frequency at 750 MHz. The GDDR5 memory is set to run at a speed of 1375 MHz on this specific card. It features 2048 SPUs along with 128 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M295X 125 Watts
Radeon HD 4870 2GB 150 Watts
Difference: 25 Watts (20%)

Memory Bandwidth

The Radeon R9 M295X should theoretically perform much faster than the Radeon HD 4870 2GB overall. (explain)

Radeon R9 M295X 176000 MB/sec
Radeon HD 4870 2GB 115200 MB/sec
Difference: 60800 (53%)

Texel Rate

The Radeon R9 M295X should be much (approximately 220%) more effective at AF than the Radeon HD 4870 2GB. (explain)

Radeon R9 M295X 96000 Mtexels/sec
Radeon HD 4870 2GB 30000 Mtexels/sec
Difference: 66000 (220%)

Pixel Rate

The Radeon R9 M295X is quite a bit (about 100%) better at AA than the Radeon HD 4870 2GB, and also should be able to handle higher resolutions more effectively. (explain)

Radeon R9 M295X 24000 Mpixels/sec
Radeon HD 4870 2GB 12000 Mpixels/sec
Difference: 12000 (100%)

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 4870 2GB

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 4870 2GB Radeon R9 M295X
Manufacturer AMD AMD
Year Jun 25, 2008 2014
Code Name RV770 XT Unknown
Memory 2048 MB 4096 MB
Core Speed 750 MHz 750 MHz
Memory Speed 3600 MHz 5500 MHz
Power (Max TDP) 150 watts 125 watts
Bandwidth 115200 MB/sec 176000 MB/sec
Texel Rate 30000 Mtexels/sec 96000 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 24000 Mpixels/sec
Unified Shaders 800(160x5) 2048
Texture Mapping Units 40 128
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
Fab Process 55 nm 28 nm
Transistors 956 million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of information (measured in MB per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 texture map elements (texels) that are applied in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the video card will be at handling 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 record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 2GB

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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