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Radeon HD 6750 1GB vs Radeon HD 7790

Intro

The Radeon HD 6750 1GB features a GPU clock speed of 725 MHz, and the 1024 MB of GDDR5 memory runs at 1000 MHz through a 128-bit bus. It also is comprised of 720 Stream Processors, 36 Texture Address Units, and 16 Raster Operation Units.

Compare those specs to the Radeon HD 7790, which has core clock speeds of 1000 MHz on the GPU, and 1500 MHz on the 1024 MB of GDDR5 RAM. It features 896 SPUs as well as 56 TAUs and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7790 85 Watts
Radeon HD 6750 1GB 86 Watts
Difference: 1 Watts (1%)

Memory Bandwidth

Theoretically, the Radeon HD 7790 should perform much faster than the Radeon HD 6750 1GB in general. (explain)

Radeon HD 7790 96000 MB/sec
Radeon HD 6750 1GB 64000 MB/sec
Difference: 32000 (50%)

Texel Rate

The Radeon HD 7790 is much (about 115%) more effective at texture filtering than the Radeon HD 6750 1GB. (explain)

Radeon HD 7790 56000 Mtexels/sec
Radeon HD 6750 1GB 26100 Mtexels/sec
Difference: 29900 (115%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7790 is superior to the Radeon HD 6750 1GB, and very much so. (explain)

Radeon HD 7790 16000 Mpixels/sec
Radeon HD 6750 1GB 11600 Mpixels/sec
Difference: 4400 (38%)

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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 6750 1GB

Amazon.com

Other US-based stores

Radeon HD 7790

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 6750 1GB Radeon HD 7790
Manufacturer ATi ATi
Year January 2011 March 2013
Code Name Juniper Pro Bonaire XT
Fab Process 40 nm 28 nm
Bus PCIe x16 PCIe 3.0 x16
Memory 1024 MB 1024 MB
Core Speed 725 MHz 1000 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1000 MHz (4000 MHz effective) 1500 MHz (6000 MHz effective)
Unified Shaders 720 896
Texture Mapping Units 36 56
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
DirectX Version DirectX 11 DirectX 11.1
OpenGL Version OpenGL 4.1 OpenGL 4.3
Power (Max TDP) 86 watts 85 watts
Shader Model 5.0 5.0
Bandwidth 64000 MB/sec 96000 MB/sec
Texel Rate 26100 Mtexels/sec 56000 Mtexels/sec
Pixel Rate 11600 Mpixels/sec 16000 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (measured in MB per second) that can be transferred across the external memory interface in one second. It is calculated by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, 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 can be processed in one second. This number is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

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