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Geforce GTX 670 vs Radeon HD 7850

Intro

The Geforce GTX 670 uses a 28 nm design. nVidia has clocked the core speed at 915 MHz. The GDDR5 memory is set to run at a frequency of 1500 MHz on this model. It features 1344 SPUs as well as 112 TAUs and 32 ROPs.

Compare those specifications to the Radeon HD 7850, which uses a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 RAM works at a speed of 1200 MHz on this model. It features 1024 SPUs as well as 64 Texture Address Units and 32 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850 130 Watts
Geforce GTX 670 170 Watts
Difference: 40 Watts (31%)

Memory Bandwidth

In theory, the Geforce GTX 670 should be much faster than the Radeon HD 7850 overall. (explain)

Geforce GTX 670 192000 MB/sec
Radeon HD 7850 153600 MB/sec
Difference: 38400 (25%)

Texel Rate

The Geforce GTX 670 will be a lot (more or less 86%) faster with regards to AF than the Radeon HD 7850. (explain)

Geforce GTX 670 102480 Mtexels/sec
Radeon HD 7850 55040 Mtexels/sec
Difference: 47440 (86%)

Pixel Rate

The Geforce GTX 670 is just a bit (approximately 6%) more effective at FSAA than the Radeon HD 7850, and should be able to handle higher screen resolutions more effectively. (explain)

Geforce GTX 670 29280 Mpixels/sec
Radeon HD 7850 27520 Mpixels/sec
Difference: 1760 (6%)

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

Geforce GTX 670

Amazon.com

Radeon HD 7850

Amazon.com

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

Model Geforce GTX 670 Radeon HD 7850
Manufacturer nVidia AMD
Year May 2012 March 2012
Code Name GK104 Pitcairn Pro
Fab Process 28 nm 28 nm
Bus PCIe 3.0 x16 PCIe 3.0 x16
Memory 2048 MB 2048 MB
Core Speed 915 MHz 860 MHz
Shader Speed 915 MHz (N/A) MHz
Memory Speed 1500 MHz (6000 MHz effective) 1200 MHz (4800 MHz effective)
Unified Shaders 1344 1024
Texture Mapping Units 112 64
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.2 OpenGL 4.2
Power (Max TDP) 170 watts 130 watts
Shader Model 5.0 5.0
Bandwidth 192000 MB/sec 153600 MB/sec
Texel Rate 102480 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 29280 Mpixels/sec 27520 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of MB per second) that can be transferred past the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This is calculated 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 processed in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Comments

One Response to “Geforce GTX 670 vs Radeon HD 7850”
Graphic Crad Expert says:
I have recently bought GTX 670...due to HD 7850 wasn't enough powerfull to max out my brand new Crysis 3 game!
I was Between GTX 670 and HD 7970 but considering that GTX 670 is using much lower power consumption and have more overclock stabillity than HD 7970 was the reason that i bought GTX 670!!!

Both cards are great if you play sport/rpg/simulator/strategy games then go for AMD if you play games like Battlefield 3 or Crysis 3 or Batman Arkham city then nVidia all the way!
Moreover nVidia drivers are much better than ATi's is!

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