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Radeon HD 7750 vs Radeon R9 M275X

Intro

The Radeon HD 7750 uses a 28 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM works at a speed of 1125 MHz on this model. It features 512 SPUs as well as 32 Texture Address Units and 16 Rasterization Operator Units.

Compare those specifications to the Radeon R9 M275X, which comes with a GPU core clock speed of 900 MHz, and 2048 MB of GDDR5 RAM set to run at 1125 MHz through a 128-bit bus. It also is comprised of 640 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R9 M275X 50 Watts
Radeon HD 7750 55 Watts
Difference: 5 Watts (10%)

Memory Bandwidth

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

Texel Rate

The Radeon R9 M275X is a lot (approximately 41%) better at anisotropic filtering than the Radeon HD 7750. (explain)

Radeon R9 M275X 36000 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 10400 (41%)

Pixel Rate

The Radeon R9 M275X will be a little bit (more or less 13%) more effective at AA than the Radeon HD 7750, and should be capable of handling higher screen resolutions better. (explain)

Radeon R9 M275X 14400 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 1600 (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 HD 7750

Amazon.com

Check prices at:

Radeon R9 M275X

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 7750 Radeon R9 M275X
Manufacturer AMD AMD
Year February 2012 May 1 2014
Code Name Cape Verde Pro Venus XTX
Memory 1024 MB 2048 MB
Core Speed 800 MHz 900 MHz
Memory Speed 4500 MHz 4500 MHz
Power (Max TDP) 55 watts 50 watts
Bandwidth 72000 MB/sec 72000 MB/sec
Texel Rate 25600 Mtexels/sec 36000 Mtexels/sec
Pixel Rate 12800 Mpixels/sec 14400 Mpixels/sec
Unified Shaders 512 640
Texture Mapping Units 32 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 1500 million (Unknown) million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

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

Display Prices

Hide Prices

Radeon HD 7750

Amazon.com

Check prices at:

Radeon R9 M275X

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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