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Radeon HD 6770 vs Radeon R7 250

Intro

The Radeon HD 6770 features a clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It features 800 SPUs, 40 TAUs, and 16 ROPs.

Compare those specs to the Radeon R7 250, which uses a 28 nm design. AMD has clocked the core speed at 1000 MHz. The GDDR5 RAM works at a speed of 1150 MHz on this particular model. It features 384 SPUs along with 24 Texture Address Units and 8 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 250 1836 points
Radeon HD 6770 1520 points
Difference: 316 (21%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 250 65 Watts
Radeon HD 6770 108 Watts
Difference: 43 Watts (66%)

Memory Bandwidth

The Radeon R7 250, in theory, should be a bit faster than the Radeon HD 6770 overall. (explain)

Radeon R7 250 73600 MB/sec
Radeon HD 6770 67200 MB/sec
Difference: 6400 (10%)

Texel Rate

The Radeon HD 6770 will be quite a bit (about 50%) faster with regards to anisotropic filtering than the Radeon R7 250. (explain)

Radeon HD 6770 36000 Mtexels/sec
Radeon R7 250 24000 Mtexels/sec
Difference: 12000 (50%)

Pixel Rate

The Radeon HD 6770 should be a lot (about 80%) more effective at AA than the Radeon R7 250, and able to handle higher screen resolutions more effectively. (explain)

Radeon HD 6770 14400 Mpixels/sec
Radeon R7 250 8000 Mpixels/sec
Difference: 6400 (80%)

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

Check prices at:

Radeon R7 250

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 Radeon R7 250
Manufacturer AMD AMD
Year January 2011 October 2013
Code Name Juniper XT Oland XT
Memory 512 MB 1024 MB
Core Speed 900 MHz 1000 MHz
Memory Speed 4200 MHz 4600 MHz
Power (Max TDP) 108 watts 65 watts
Bandwidth 67200 MB/sec 73600 MB/sec
Texel Rate 36000 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 14400 Mpixels/sec 8000 Mpixels/sec
Unified Shaders 800 384
Texture Mapping Units 40 24
Render Output Units 16 8
Bus Type GDDR5 GDDR5
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: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transferred past the external memory interface in one second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of ROPs 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 fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

Radeon HD 6770

Amazon.com

Check prices at:

Radeon R7 250

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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