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Radeon HD 4870 1GB vs Radeon R9 M390X

Intro

The Radeon HD 4870 1GB has a core clock speed of 750 MHz and a GDDR5 memory speed of 900 MHz. It also makes use of a 256-bit bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 TAUs, and 16 ROPs.

Compare those specs to the Radeon R9 M390X, which features clock speeds of 723 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. 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 M390X 125 Watts
Radeon HD 4870 1GB 150 Watts
Difference: 25 Watts (20%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 M390X should perform quite a bit faster than the Radeon HD 4870 1GB in general. (explain)

Radeon R9 M390X 160000 MB/sec
Radeon HD 4870 1GB 115200 MB/sec
Difference: 44800 (39%)

Texel Rate

The Radeon R9 M390X will be much (more or less 208%) better at AF than the Radeon HD 4870 1GB. (explain)

Radeon R9 M390X 92544 Mtexels/sec
Radeon HD 4870 1GB 30000 Mtexels/sec
Difference: 62544 (208%)

Pixel Rate

The Radeon R9 M390X should be quite a bit (about 93%) faster with regards to FSAA than the Radeon HD 4870 1GB, and also should be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M390X 23136 Mpixels/sec
Radeon HD 4870 1GB 12000 Mpixels/sec
Difference: 11136 (93%)

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 M390X

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 M390X
Manufacturer AMD AMD
Year Jun 25, 2008 2015
Code Name RV770 XT Tonga
Memory 1024 MB 4096 MB
Core Speed 750 MHz 723 MHz
Memory Speed 3600 MHz 5000 MHz
Power (Max TDP) 150 watts 125 watts
Bandwidth 115200 MB/sec 160000 MB/sec
Texel Rate 30000 Mtexels/sec 92544 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 23136 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 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (in units of MB per second) that can be transported past the external memory interface within a second. The number is calculated by multiplying the card's interface width by the speed of its memory. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. 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 also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 4870 1GB

Amazon.com

Check prices at:

Radeon R9 M390X

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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