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Radeon HD 3870 X2 1GB vs Radeon R9 M370X

Intro

The Radeon HD 3870 X2 1GB uses a 55 nm design. AMD has set the core speed at 825 MHz. The GDDR4 memory runs at a frequency of 1126 MHz on this specific card. It features 320(64x5) SPUs along with 16 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M370X, which has core clock speeds of 800 MHz on the GPU, and 1125 MHz on the 2048 MB of GDDR5 RAM. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon HD 3870 X2 1GB should theoretically be much better than the Radeon R9 M370X overall. (explain)

Radeon HD 3870 X2 1GB 144128 MB/sec
Radeon R9 M370X 72000 MB/sec
Difference: 72128 (100%)

Texel Rate

The Radeon R9 M370X should be much (more or less 21%) more effective at AF than the Radeon HD 3870 X2 1GB. (explain)

Radeon R9 M370X 32000 Mtexels/sec
Radeon HD 3870 X2 1GB 26400 Mtexels/sec
Difference: 5600 (21%)

Pixel Rate

The Radeon HD 3870 X2 1GB should be much (about 106%) better at FSAA than the Radeon R9 M370X, and also will be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 3870 X2 1GB 26400 Mpixels/sec
Radeon R9 M370X 12800 Mpixels/sec
Difference: 13600 (106%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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Radeon HD 3870 X2 1GB

Amazon.com

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Radeon R9 M370X

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 3870 X2 1GB Radeon R9 M370X
Manufacturer AMD AMD
Year Jan 28, 2008 2015
Code Name R680 Cape Verde
Memory 1024 MB (x2) 2048 MB
Core Speed 825 MHz (x2) 800 MHz
Memory Speed 2252 MHz (x2) 4500 MHz
Power (Max TDP) (Unknown) watts (Unknown) watts
Bandwidth 144128 MB/sec 72000 MB/sec
Texel Rate 26400 Mtexels/sec 32000 Mtexels/sec
Pixel Rate 26400 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 320(64x5) (x2) 640
Texture Mapping Units 16 (x2) 40
Render Output Units 16 (x2) 16
Bus Type GDDR4 GDDR5
Bus Width 256-bit (x2) 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16/(internal PCIe 1.1 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 max amount of data (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of 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 3870 X2 1GB

Amazon.com

Check prices at:

Radeon R9 M370X

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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