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Radeon HD 5670 vs Radeon R9 M265X

Intro

The Radeon HD 5670 features a core clock frequency of 775 MHz and a GDDR5 memory speed of 1000 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 400(80x5) SPUs, 20 TAUs, and 8 Raster Operation Units.

Compare those specs to the Radeon R9 M265X, which features GPU clock speed of 575 MHz, and 2048 MB of GDDR5 memory running at 1125 MHz through a 128-bit bus. It also is made up of 640 Stream Processors, 40 Texture Address Units, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon R9 M265X should be 13% faster than the Radeon HD 5670 overall, due to its greater data rate. (explain)

Radeon R9 M265X 72000 MB/sec
Radeon HD 5670 64000 MB/sec
Difference: 8000 (13%)

Texel Rate

The Radeon R9 M265X will be a lot (approximately 48%) more effective at AF than the Radeon HD 5670. (explain)

Radeon R9 M265X 23000 Mtexels/sec
Radeon HD 5670 15500 Mtexels/sec
Difference: 7500 (48%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 M265X is the winner, by a large margin. (explain)

Radeon R9 M265X 9200 Mpixels/sec
Radeon HD 5670 6200 Mpixels/sec
Difference: 3000 (48%)

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 5670

Amazon.com

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Radeon R9 M265X

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 5670 Radeon R9 M265X
Manufacturer AMD AMD
Year January 14, 2010 May 1 2014
Code Name Redwood XT Venus Pro
Memory 1024 MB 2048 MB
Core Speed 775 MHz 575 MHz
Memory Speed 4000 MHz 4500 MHz
Power (Max TDP) 61 watts (Unknown) watts
Bandwidth 64000 MB/sec 72000 MB/sec
Texel Rate 15500 Mtexels/sec 23000 Mtexels/sec
Pixel Rate 6200 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 400(80x5) 640
Texture Mapping Units 20 40
Render Output Units 8 16
Bus Type GDDR5 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 627 million (Unknown) million
Bus PCIe 2.1 x16 PCIe 3.0 x16
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 3.2 OpenGL 4.3

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of megabytes per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the card's interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher this number, the better the 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 maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially 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 5670

Amazon.com

Check prices at:

Radeon R9 M265X

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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