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Radeon HD 7850 vs Radeon R7 260X


Intro

The Radeon HD 7850 has clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 TAUs and 32 ROPs.

Compare those specs to the Radeon R7 260X, which uses a 28 nm design. AMD has clocked the core speed at 1100 MHz. The GDDR5 RAM works at a speed of 1625 MHz on this particular model. It features 896 SPUs as well as 56 Texture Address Units and 16 ROPs.

Display Graphs

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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 HD 7850 5200 points
Radeon R7 260X 4380 points
Difference: 820 (19%)

Zcash Mining Hash Rate

Radeon HD 7850 171 Sol/s
Radeon R7 260X 95 Sol/s
Difference: 76 (80%)

Ethereum Mining Hash Rate

Radeon R7 260X 14 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 1 (8%)

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

As far as performance goes, the Radeon HD 7850 should in theory be a lot better 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 is a small bit (approximately 12%) better 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

If using lots of anti-aliasing is important to you, then the Radeon HD 7850 is superior to the Radeon R7 260X, and very much so. (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

Radeon HD 7850

Radeon R7 260X

Specifications

Display Specifications

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Model Radeon HD 7850 Radeon R7 260X
Manufacturer AMD AMD
Year March 2012 October 2013
Code Name Pitcairn Pro Bonaire XTX
Memory 2048 MB 2048 MB
Core Speed 860 MHz 1100 MHz
Memory Speed 4800 MHz 6500 MHz
Power (Max TDP) 130 watts 115 watts
Bandwidth 153600 MB/sec 104000 MB/sec
Texel Rate 55040 Mtexels/sec 61600 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 17600 Mpixels/sec
Unified Shaders 1024 896
Texture Mapping Units 64 56
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 2080 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.1 DirectX 11.2
OpenGL Version OpenGL 4.2 OpenGL 4.3

Memory Bandwidth: Bandwidth is the largest amount of data (counted in MB per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, 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 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 the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Radeon HD 7850

Radeon R7 260X

Comments

4 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! 🙂

Blair says:

Uh the 7850 has a TDP of 150Watts watts not 130Watts. That's why it is such a great overclocking GPU. You could make it perform almost even with a stock 7870 if you could get a high stable overclock.

Blair says:

(Quote:)You were wrong with TEXEL RATE... You wrote... 7850 = 64 TMU=55040 TR and R7 260X = 56 TMU = 61600 TR.

This might be true with a factory overclocked card. but Stock clock the 260X has a higher texel rate. That does not mean it is faster. You have to keep in consideration the other numbers.

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