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Radeon HD 3870 1GB vs Radeon R9 M375

Intro

The Radeon HD 3870 1GB uses a 55 nm design. AMD has clocked the core frequency at 775 MHz. The GDDR4 memory runs at a frequency of 1125 MHz on this specific model. It features 320(64x5) SPUs along with 16 TAUs and 16 Rasterization Operator Units.

Compare that to the Radeon R9 M375, which has a core clock frequency of 1015 MHz and a DDR3 memory speed of 1100 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 3870 1GB is 105% quicker than the Radeon R9 M375 overall, because of its higher data rate. (explain)

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

Texel Rate

The Radeon R9 M375 will be a lot (more or less 227%) more effective at AF 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

If running with high levels of AA is important to you, then the Radeon R9 M375 is superior to the Radeon HD 3870 1GB, and very much so. (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

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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: Bandwidth is the largest amount of information (measured in MB per second) that can be moved past the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach 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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