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GeForce GTX 480 vs Radeon HD 6850

Intro

The GeForce GTX 480 comes with a core clock frequency of 700 MHz and a GDDR5 memory frequency of 924 MHz. It also uses a 384-bit memory bus, and makes use of a 40 nm design. It is comprised of 480 SPUs, 60 Texture Address Units, and 48 Raster Operation Units.

Compare all of that to the Radeon HD 6850, which comes with a clock frequency of 775 MHz and a GDDR5 memory frequency of 1000 MHz. It also makes use of a 256-bit bus, and makes use of a 40 nm design. It features 960 SPUs, 48 Texture Address Units, and 32 Raster Operation Units.

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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

GeForce GTX 480 3650 points
Radeon HD 6850 2395 points
Difference: 1255 (52%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 480 250 Watts
Difference: 123 Watts (97%)

Memory Bandwidth

The GeForce GTX 480 should theoretically perform much faster than the Radeon HD 6850 in general. (explain)

GeForce GTX 480 177408 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 49408 (39%)

Texel Rate

The GeForce GTX 480 will be a bit (approximately 13%) better at AF than the Radeon HD 6850. (explain)

GeForce GTX 480 42000 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 4800 (13%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 480 is superior to the Radeon HD 6850, by a large margin. (explain)

GeForce GTX 480 33600 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 8800 (35%)

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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GeForce GTX 480

Amazon.com

Check prices at:

Radeon HD 6850

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 GeForce GTX 480 Radeon HD 6850
Manufacturer nVidia AMD
Year March 2010 October 2010
Code Name GF100 Barts Pro
Memory 1536 MB 1024 MB
Core Speed 700 MHz 775 MHz
Memory Speed 3696 MHz 4000 MHz
Power (Max TDP) 250 watts 127 watts
Bandwidth 177408 MB/sec 128000 MB/sec
Texel Rate 42000 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 480 960
Texture Mapping Units 60 48
Render Output Units 48 32
Bus Type GDDR5 GDDR5
Bus Width 384-bit 256-bit
Fab Process 40 nm 40 nm
Transistors 3000 million 1700 million
Bus PCIe x16 PCIe x16
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. The number is worked out by multiplying the card's bus width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This is worked out by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly record to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GTX 480

Amazon.com

Check prices at:

Radeon HD 6850

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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