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Radeon HD 7750 vs Radeon HD 7870 XT

Intro

The Radeon HD 7750 features a clock speed of 800 MHz and a GDDR5 memory frequency of 1125 MHz. It also uses a 128-bit bus, and makes use of a 28 nm design. It is made up of 512 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare all that to the Radeon HD 7870 XT, which uses a 28 nm design. AMD has set the core frequency at 925 MHz. The GDDR5 memory is set to run at a speed of 1500 MHz on this card. It features 1536 SPUs as well as 96 Texture Address Units and 32 ROPs.

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 7870 XT 6390 points
Radeon HD 7750 2240 points
Difference: 4150 (185%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750 55 Watts
Radeon HD 7870 XT 185 Watts
Difference: 130 Watts (236%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 XT will be 167% quicker than the Radeon HD 7750 in general, due to its higher data rate. (explain)

Radeon HD 7870 XT 192000 MB/sec
Radeon HD 7750 72000 MB/sec
Difference: 120000 (167%)

Texel Rate

The Radeon HD 7870 XT is much (approximately 247%) more effective at texture filtering than the Radeon HD 7750. (explain)

Radeon HD 7870 XT 88800 Mtexels/sec
Radeon HD 7750 25600 Mtexels/sec
Difference: 63200 (247%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7870 XT is a better choice, by a large margin. (explain)

Radeon HD 7870 XT 29600 Mpixels/sec
Radeon HD 7750 12800 Mpixels/sec
Difference: 16800 (131%)

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

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Radeon HD 7870 XT

Amazon.com

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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 HD 7870 XT
Manufacturer AMD AMD
Year February 2012 November 2012
Code Name Cape Verde Pro Tahiti LE
Memory 1024 MB 2048 MB
Core Speed 800 MHz 925 MHz
Memory Speed 4500 MHz 6000 MHz
Power (Max TDP) 55 watts 185 watts
Bandwidth 72000 MB/sec 192000 MB/sec
Texel Rate 25600 Mtexels/sec 88800 Mtexels/sec
Pixel Rate 12800 Mpixels/sec 29600 Mpixels/sec
Unified Shaders 512 1536
Texture Mapping Units 32 96
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1500 million 4313 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface in a second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 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, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure 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 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 most pixels that the graphics chip can 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 Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Radeon HD 7750

Amazon.com

Check prices at:

Radeon HD 7870 XT

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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