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Radeon HD 7750 vs Radeon HD 7870 XT

Intro

The Radeon HD 7750 features a GPU core speed of 800 MHz, and the 1024 MB of GDDR5 RAM runs at 1125 MHz through a 128-bit bus. It also is made up of 512 Stream Processors, 32 TAUs, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 7870 XT, which features GPU core speed of 925 MHz, and 2048 MB of GDDR5 memory set to run at 1500 MHz through a 256-bit bus. It also is comprised of 1536 SPUs, 96 Texture Address Units, and 32 Raster Operation Units.

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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

In theory, the Radeon HD 7870 XT is 167% quicker than the Radeon HD 7750 in general, because of its greater bandwidth. (explain)

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

Texel Rate

The Radeon HD 7870 XT should be much (about 247%) more effective at anisotropic 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 high levels of AA is important to you, then the Radeon HD 7870 XT is superior to the Radeon HD 7750, and very much so. (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: Bandwidth is the largest amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum 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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