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Radeon HD 3870 1GB vs Radeon R9 M375

Intro

The Radeon HD 3870 1GB comes with a clock frequency of 775 MHz and a GDDR4 memory speed of 1125 MHz. It also features a 256-bit memory bus, and makes use of a 55 nm design. It is comprised of 320(64x5) SPUs, 16 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon R9 M375, which makes use of a 28 nm design. AMD has set the core speed at 1015 MHz. The DDR3 memory runs at a frequency of 1100 MHz on this card. It features 640 SPUs as well as 40 Texture Address Units and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3870 1GB should perform a lot faster than the Radeon R9 M375 overall. (explain)

Radeon HD 3870 1GB 72000 MB/sec
Radeon R9 M375 35200 MB/sec
Difference: 36800 (105%)

Texel Rate

The Radeon R9 M375 is much (about 227%) faster with regards to texture filtering than the Radeon HD 3870 1GB. (explain)

Radeon R9 M375 40600 Mtexels/sec
Radeon HD 3870 1GB 12400 Mtexels/sec
Difference: 28200 (227%)

Pixel Rate

The Radeon R9 M375 is a lot (more or less 31%) more effective at AA than the Radeon HD 3870 1GB, and should be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 M375 16240 Mpixels/sec
Radeon HD 3870 1GB 12400 Mpixels/sec
Difference: 3840 (31%)

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 3870 1GB

Amazon.com

Check prices at:

Radeon R9 M375

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 1GB Radeon R9 M375
Manufacturer AMD AMD
Year Nov 19, 2007 2015
Code Name RV670 XT Cape Verde
Memory 1024 MB 4096 MB
Core Speed 775 MHz 1015 MHz
Memory Speed 2250 MHz 2200 MHz
Power (Max TDP) 106 watts (Unknown) watts
Bandwidth 72000 MB/sec 35200 MB/sec
Texel Rate 12400 Mtexels/sec 40600 Mtexels/sec
Pixel Rate 12400 Mpixels/sec 16240 Mpixels/sec
Unified Shaders 320(64x5) 640
Texture Mapping Units 16 40
Render Output Units 16 16
Bus Type GDDR4 DDR3
Bus Width 256-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 2.0 x16/AGP 8x PCIe 3.0 x16
DirectX Version DirectX 10.1 DirectX 12
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the better 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 texture map elements (texels) that can be 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 this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to 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 get to the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 3870 1GB

Amazon.com

Check prices at:

Radeon R9 M375

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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