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Radeon HD 4770 vs Radeon R7 M260

Intro

The Radeon HD 4770 has a GPU core clock speed of 750 MHz, and the 512 MB of GDDR5 RAM is set to run at 800 MHz through a 128-bit bus. It also is comprised of 640(128x5) SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare that to the Radeon R7 M260, which comes with a core clock frequency of 715 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It is comprised of 384 SPUs, 24 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 4770 should be 220% quicker than the Radeon R7 M260 in general, because of its higher bandwidth. (explain)

Radeon HD 4770 51200 MB/sec
Radeon R7 M260 16000 MB/sec
Difference: 35200 (220%)

Texel Rate

The Radeon HD 4770 is quite a bit (about 40%) more effective at anisotropic filtering than the Radeon R7 M260. (explain)

Radeon HD 4770 24000 Mtexels/sec
Radeon R7 M260 17160 Mtexels/sec
Difference: 6840 (40%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4770 is the winner, and very much so. (explain)

Radeon HD 4770 12000 Mpixels/sec
Radeon R7 M260 5720 Mpixels/sec
Difference: 6280 (110%)

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 4770

Amazon.com

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Radeon R7 M260

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 4770 Radeon R7 M260
Manufacturer AMD AMD
Year Apr 28, 2009 June 2014
Code Name RV740 Opal/Topaz
Memory 512 MB 2048 MB
Core Speed 750 MHz 715 MHz
Memory Speed 3200 MHz 2000 MHz
Power (Max TDP) 80 watts (Unknown) watts
Bandwidth 51200 MB/sec 16000 MB/sec
Texel Rate 24000 Mtexels/sec 17160 Mtexels/sec
Pixel Rate 12000 Mpixels/sec 5720 Mpixels/sec
Unified Shaders 640(128x5) 384
Texture Mapping Units 32 24
Render Output Units 16 8
Bus Type GDDR5 DDR3
Bus Width 128-bit 64-bit
Fab Process 40 nm 28 nm
Transistors 826 million (Unknown) million
Bus PCIe 2.0 x16 PCIe 3.0 x8
DirectX Version DirectX 10.1 DirectX 11.2
OpenGL Version OpenGL 3.0 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in MB per second) that can be transferred over the external memory interface within a second. It is calculated by multiplying the card's interface width by the speed of its memory. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's 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 are applied in one second. This figure is calculated by multiplying the total texture units of the card by the core clock 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 record to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the the core 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 output rate also depends on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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Radeon HD 4770

Amazon.com

Check prices at:

Radeon R7 M260

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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