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Radeon HD 5870 vs Radeon R7 M265

Intro

The Radeon HD 5870 features a core clock speed of 850 MHz and a GDDR5 memory frequency of 1200 MHz. It also features a 256-bit memory bus, and makes use of a 40 nm design. It features 1600(320x5) SPUs, 80 Texture Address Units, and 32 ROPs.

Compare all of that to the Radeon R7 M265, which features a GPU core clock speed of 725 MHz, and 2048 MB of DDR3 memory set to run at 1000 MHz through a 128-bit bus. It also is made up of 384 SPUs, 24 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically speaking, the Radeon HD 5870 will be 380% faster than the Radeon R7 M265 in general, because of its greater data rate. (explain)

Radeon HD 5870 153600 MB/sec
Radeon R7 M265 32000 MB/sec
Difference: 121600 (380%)

Texel Rate

The Radeon HD 5870 should be much (about 291%) better at texture filtering than the Radeon R7 M265. (explain)

Radeon HD 5870 68000 Mtexels/sec
Radeon R7 M265 17400 Mtexels/sec
Difference: 50600 (291%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 5870 is superior to the Radeon R7 M265, by a large margin. (explain)

Radeon HD 5870 27200 Mpixels/sec
Radeon R7 M265 5800 Mpixels/sec
Difference: 21400 (369%)

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 5870

Amazon.com

Check prices at:

Radeon R7 M265

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 5870 Radeon R7 M265
Manufacturer AMD AMD
Year September 23, 2009 May 1 2014
Code Name Cypress XT Opal XT
Memory 1024 MB 2048 MB
Core Speed 850 MHz 725 MHz
Memory Speed 4800 MHz 2000 MHz
Power (Max TDP) 188 watts (Unknown) watts
Bandwidth 153600 MB/sec 32000 MB/sec
Texel Rate 68000 Mtexels/sec 17400 Mtexels/sec
Pixel Rate 27200 Mpixels/sec 5800 Mpixels/sec
Unified Shaders 1600(320x5) 384
Texture Mapping Units 80 24
Render Output Units 32 8
Bus Type GDDR5 DDR3
Bus Width 256-bit 128-bit
Fab Process 40 nm 28 nm
Transistors 2154 million (Unknown) million
Bus PCIe 2.1 x16 PCIe 3.0 x8
DirectX Version DirectX 11 DirectX 11.2
OpenGL Version OpenGL 3.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the maximum amount of information (counted in megabytes per second) that can be moved across the external memory interface in 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 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 AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is calculated by multiplying the total number of texture units 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip could possibly write to the local memory per 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 - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

Radeon HD 5870

Amazon.com

Check prices at:

Radeon R7 M265

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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