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Radeon HD 7850 vs Radeon R7 260X

Intro

The Radeon HD 7850 makes use of a 28 nm design. ATi has clocked the core speed at 860 MHz. The GDDR5 memory works at a frequency of 1200 MHz on this card. It features 1024 SPUs as well as 64 TAUs and 32 Rasterization Operator Units.

Compare all of that to the Radeon R7 260X, which has GPU core speed of 1100 MHz, and 2048 MB of GDDR5 RAM set to run at 1625 MHz through a 128-bit bus. It also is made up of 896 Stream Processors, 56 TAUs, and 16 ROPs.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 260X 115 Watts
Radeon HD 7850 130 Watts
Difference: 15 Watts (13%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7850 should be quite a bit faster than the Radeon R7 260X overall. (explain)

Radeon HD 7850 153600 MB/sec
Radeon R7 260X 104000 MB/sec
Difference: 49600 (48%)

Texel Rate

The Radeon R7 260X will be a bit (about 12%) more effective at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon R7 260X 61600 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 6560 (12%)

Pixel Rate

The Radeon HD 7850 should be quite a bit (about 56%) more effective at anti-aliasing than the Radeon R7 260X, and will be capable of handling higher screen resolutions better. (explain)

Radeon HD 7850 27520 Mpixels/sec
Radeon R7 260X 17600 Mpixels/sec
Difference: 9920 (56%)

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

Please note that the price comparisons are based on search keywords, and might not be the exact same card listed on this page. We have no control over the accuracy of their search results.

Radeon HD 7850

Amazon.com

Other US-based stores

Radeon R7 260X

Amazon.com

Other US-based stores

Specifications

Model Radeon HD 7850 Radeon R7 260X
Manufacturer ATi ATi
Year March 2012 October 2013
Code Name Pitcairn Pro Bonaire XTX
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 2048 MB
Core Speed 860 MHz 1100 MHz
Shader Speed N/A MHz (N/A) MHz
Memory Speed 1200 MHz (4800 MHz effective) 1625 MHz (6500 MHz effective)
Unified Shaders 1024 896
Texture Mapping Units 64 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3
Power (Max TDP) 130 watts 115 watts
Shader Model 5.0 5.0
Bandwidth 153600 MB/sec 104000 MB/sec
Texel Rate 55040 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 17600 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the largest amount of information (in units of megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher this number, the better the 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 that the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Raster Operations Pipelines 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Comments

2 Responses to “Radeon HD 7850 vs Radeon R7 260X”
Muky says:
You were wrong with TEXEL RATE... You wrote... 7850 = 64 TMU=55040 TR and R7 260X = 56 TMU = 61600 TR.
Muky says:
My mistake... It's OK! Sorry! :)

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