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Radeon R9 M275X vs Radeon R9 M375X

Intro

The Radeon R9 M275X uses a 28 nm design. AMD has set the core frequency at 900 MHz. The GDDR5 memory is set to run at a frequency of 1125 MHz on this model. It features 640 SPUs along with 40 TAUs and 16 ROPs.

Compare all of that to the Radeon R9 M375X, which features core clock speeds of 1015 MHz on the GPU, and 1125 MHz on the 4096 MB of GDDR5 memory. It features 640 SPUs as well as 40 TAUs and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have the exact same memory bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The Radeon R9 M375X should be a bit (more or less 13%) faster with regards to anisotropic filtering than the Radeon R9 M275X. (explain)

Radeon R9 M375X 40600 Mtexels/sec
Radeon R9 M275X 36000 Mtexels/sec
Difference: 4600 (13%)

Pixel Rate

The Radeon R9 M375X is a little bit (approximately 13%) more effective at FSAA than the Radeon R9 M275X, and also capable of handling higher resolutions without slowing down too much. (explain)

Radeon R9 M375X 16240 Mpixels/sec
Radeon R9 M275X 14400 Mpixels/sec
Difference: 1840 (13%)

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 R9 M275X

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.

Specifications

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Model Radeon R9 M275X Radeon R9 M375X
Manufacturer AMD AMD
Year May 1 2014 2015
Code Name Venus XTX Cape Verde
Memory 2048 MB 4096 MB
Core Speed 900 MHz 1015 MHz
Memory Speed 4500 MHz 4500 MHz
Power (Max TDP) 50 watts (Unknown) watts
Bandwidth 72000 MB/sec 72000 MB/sec
Texel Rate 36000 Mtexels/sec 40600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 16240 Mpixels/sec
Unified Shaders 640 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors (Unknown) million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.2 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in megabytes per second) that can be transported across the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The figure 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 filling the screen with pixels (the image). The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon R9 M275X

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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