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Radeon HD 4870 1GB vs Radeon R9 M375X

Intro

The Radeon HD 4870 1GB makes use of a 55 nm design. AMD has set the core speed at 750 MHz. The GDDR5 memory runs at a frequency of 900 MHz on this specific card. It features 800(160x5) SPUs along with 40 TAUs and 16 ROPs.

Compare that to the Radeon R9 M375X, which comes with core speeds of 1015 MHz on the GPU, and 1125 MHz on the 4096 MB of GDDR5 RAM. It features 640 SPUs along with 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 4870 1GB should theoretically be a lot superior to the Radeon R9 M375X in general. (explain)

Radeon HD 4870 1GB 115200 MB/sec
Radeon R9 M375X 72000 MB/sec
Difference: 43200 (60%)

Texel Rate

The Radeon R9 M375X will be a lot (more or less 35%) more effective at AF than the Radeon HD 4870 1GB. (explain)

Radeon R9 M375X 40600 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 10600 (35%)

Pixel Rate

The Radeon R9 M375X is quite a bit (more or less 35%) better at full screen anti-aliasing than the Radeon HD 4870 1GB, and able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M375X 16240 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 4240 (35%)

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 1GB

Amazon.com

Check prices at:

Radeon R9 M375X

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 1GB Radeon R9 M375X
Manufacturer AMD AMD
Year Jun 25, 2008 2015
Code Name RV770 XT Cape Verde
Memory 1024 MB 4096 MB
Core Speed 750 MHz 1015 MHz
Memory Speed 3600 MHz 4500 MHz
Power (Max TDP) 150 watts (Unknown) watts
Bandwidth 115200 MB/sec 72000 MB/sec
Texel Rate 30000 Mtexels/sec 40600 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 16240 Mpixels/sec
Unified Shaders 800(160x5) 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-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 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's bus width by its memory clock speed. If it uses DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 1GB

Amazon.com

Check prices at:

Radeon R9 M375X

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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