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Radeon HD 6770 vs Radeon R7 250X

Intro

The Radeon HD 6770 comes with a GPU clock speed of 900 MHz, and the 512 MB of GDDR5 memory runs at 1050 MHz through a 128-bit bus. It also features 800 SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Compare that to the Radeon R7 250X, which has core speeds of 1000 MHz on the GPU, and 1125 MHz on the 1024 MB of GDDR5 memory. It features 640 SPUs as well as 40 Texture Address Units and 16 Rasterization Operator 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 R7 250X 2860 points
Radeon HD 6770 1520 points
Difference: 1340 (88%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250X 95 Watts
Radeon HD 6770 108 Watts
Difference: 13 Watts (14%)

Memory Bandwidth

The Radeon R7 250X should theoretically be a small bit faster than the Radeon HD 6770 in general. (explain)

Radeon R7 250X 72000 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 4800 (7%)

Texel Rate

The Radeon R7 250X is just a bit (approximately 11%) more effective at anisotropic filtering than the Radeon HD 6770. (explain)

Radeon R7 250X 40000 Mtexels/sec
Radeon HD 6770 36000 Mtexels/sec
Difference: 4000 (11%)

Pixel Rate

The Radeon R7 250X will be just a bit (approximately 11%) better at FSAA than the Radeon HD 6770, and should be capable of handling higher resolutions while still performing well. (explain)

Radeon R7 250X 16000 Mpixels/sec
Radeon HD 6770 14400 Mpixels/sec
Difference: 1600 (11%)

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

Amazon.com

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Radeon R7 250X

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 6770 Radeon R7 250X
Manufacturer AMD AMD
Year January 2011 February 2014
Code Name Juniper XT Cape Verde XT
Memory 512 MB 1024 MB
Core Speed 900 MHz 1000 MHz
Memory Speed 4200 MHz 4500 MHz
Power (Max TDP) 108 watts 95 watts
Bandwidth 67200 MB/sec 72000 MB/sec
Texel Rate 36000 Mtexels/sec 40000 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 16000 Mpixels/sec
Unified Shaders 800 640
Texture Mapping Units 40 40
Render Output Units 16 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 1040 million 1500 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: Memory bandwidth is the largest amount of information (counted in megabytes per second) that can be moved across the external memory interface in a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR memory, it must be multiplied by 2 once again. If 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 higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher 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 one second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the clock speed of the card. 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 fill rate also depends on lots of 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 6770

Amazon.com

Check prices at:

Radeon R7 250X

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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