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Radeon HD 7850 vs Radeon R9 290


Intro

The Radeon HD 7850 features core clock speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs along with 64 Texture Address Units and 32 Rasterization Operator Units.

Compare those specs to the Radeon R9 290, which has core clock speeds of 800 MHz on the GPU, and 1250 MHz on the 4096 MB of GDDR5 memory. It features 2560 SPUs along with 160 Texture Address Units and 64 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 R9 290 9795 points
Radeon HD 7850 5200 points
Difference: 4595 (88%)

Zcash Mining Hash Rate

Radeon R9 290 283 Sol/s
Radeon HD 7850 171 Sol/s
Difference: 112 (65%)

Ethereum Mining Hash Rate

Radeon R9 290 29 Mh/s
Radeon HD 7850 13 Mh/s
Difference: 16 (123%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Radeon R9 290 300 Watts
Difference: 170 Watts (131%)

Memory Bandwidth

In theory, the Radeon R9 290 should be 108% faster than the Radeon HD 7850 in general, because of its higher data rate. (explain)

Radeon R9 290 320000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 166400 (108%)

Texel Rate

The Radeon R9 290 is quite a bit (about 133%) faster with regards to AF than the Radeon HD 7850. (explain)

Radeon R9 290 128000 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 72960 (133%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 290 is superior to the Radeon HD 7850, and very much so. (explain)

Radeon R9 290 51200 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 23680 (86%)

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 R9 290

Specifications

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Model Radeon HD 7850 Radeon R9 290
Manufacturer AMD AMD
Year March 2012 November 2013
Code Name Pitcairn Pro Hawaii PRO
Memory 2048 MB 4096 MB
Core Speed 860 MHz 800 MHz
Memory Speed 4800 MHz 5000 MHz
Power (Max TDP) 130 watts 300 watts
Bandwidth 153600 MB/sec 320000 MB/sec
Texel Rate 55040 Mtexels/sec 128000 Mtexels/sec
Pixel Rate 27520 Mpixels/sec 51200 Mpixels/sec
Unified Shaders 1024 2560
Texture Mapping Units 64 160
Render Output Units 32 64
Bus Type GDDR5 GDDR5
Bus Width 256-bit 512-bit
Fab Process 28 nm 28 nm
Transistors 2800 million 6200 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 maximum amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Radeon HD 7850

Radeon R9 290

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