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Radeon HD 6770 1GB vs Radeon R7 240

Intro

The Radeon HD 6770 1GB comes with core speeds of 900 MHz on the GPU, and 1050 MHz on the 1024 MB of GDDR5 memory. It features 800 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Compare all that to the Radeon R7 240, which has core speeds of 730 MHz on the GPU, and 900 MHz on the 2048 MB of DDR3 RAM. It features 320 SPUs as well as 20 TAUs and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240 30 Watts
Radeon HD 6770 1GB 108 Watts
Difference: 78 Watts (260%)

Memory Bandwidth

In theory, the Radeon HD 6770 1GB should be 133% faster than the Radeon R7 240 in general, due to its higher bandwidth. (explain)

Radeon HD 6770 1GB 67200 MB/sec
Radeon R7 240 28800 MB/sec
Difference: 38400 (133%)

Texel Rate

The Radeon HD 6770 1GB will be quite a bit (more or less 147%) better at texture filtering than the Radeon R7 240. (explain)

Radeon HD 6770 1GB 36000 Mtexels/sec
Radeon R7 240 14600 Mtexels/sec
Difference: 21400 (147%)

Pixel Rate

The Radeon HD 6770 1GB is a lot (about 147%) more effective at AA than the Radeon R7 240, and also should be able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6770 1GB 14400 Mpixels/sec
Radeon R7 240 5840 Mpixels/sec
Difference: 8560 (147%)

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 6770 1GB

Amazon.com

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Radeon R7 240

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 6770 1GB Radeon R7 240
Manufacturer AMD AMD
Year January 2011 October 2013
Code Name Juniper XT Oland PRO
Memory 1024 MB 2048 MB
Core Speed 900 MHz 730 MHz
Memory Speed 4200 MHz 1800 MHz
Power (Max TDP) 108 watts 30 watts
Bandwidth 67200 MB/sec 28800 MB/sec
Texel Rate 36000 Mtexels/sec 14600 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 5840 Mpixels/sec
Unified Shaders 800 320
Texture Mapping Units 40 20
Render Output Units 16 8
Bus Type GDDR5 DDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 1040 million
Bus PCIe x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 4.1 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be moved past the external memory interface in a second. The number is worked out by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This figure is calculated 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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Radeon HD 6770 1GB

Amazon.com

Check prices at:

Radeon R7 240

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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