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Radeon HD 3690/3830 vs Radeon R9 M375X

Intro

The Radeon HD 3690/3830 uses a 55 nm design. AMD has clocked the core frequency at 668 MHz. The GDDR3 RAM runs at a speed of 828 MHz on this card. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

Compare all that to the Radeon R9 M375X, which has a GPU core clock speed of 1015 MHz, and 4096 MB of GDDR5 memory set to run at 1125 MHz through a 128-bit bus. It also features 640 Stream Processors, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R9 M375X should theoretically be much better than the Radeon HD 3690/3830 in general. (explain)

Radeon R9 M375X 72000 MB/sec
Radeon HD 3690/3830 26496 MB/sec
Difference: 45504 (172%)

Texel Rate

The Radeon R9 M375X is much (about 280%) more effective at anisotropic filtering than the Radeon HD 3690/3830. (explain)

Radeon R9 M375X 40600 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 29912 (280%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R9 M375X is a better choice, and very much so. (explain)

Radeon R9 M375X 16240 Mpixels/sec
Radeon HD 3690/3830 10688 Mpixels/sec
Difference: 5552 (52%)

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 3690/3830

Amazon.com

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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 3690/3830 Radeon R9 M375X
Manufacturer AMD AMD
Year 2008 2015
Code Name RV670 PRO Cape Verde
Memory 256 MB 4096 MB
Core Speed 668 MHz 1015 MHz
Memory Speed 1656 MHz 4500 MHz
Power (Max TDP) 75 watts (Unknown) watts
Bandwidth 26496 MB/sec 72000 MB/sec
Texel Rate 10688 Mtexels/sec 40600 Mtexels/sec
Pixel Rate 10688 Mpixels/sec 16240 Mpixels/sec
Unified Shaders 320(64x5) 640
Texture Mapping Units 16 40
Render Output Units 16 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 55 nm 28 nm
Transistors (Unknown) 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: Memory bandwidth is the maximum amount of information (in units of MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory clock speed. If it uses DDR memory, it should be multiplied by 2 once again. If 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 amount of texture map elements (texels) that are applied per second. This number is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

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

Display Prices

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Radeon HD 3690/3830

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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