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GeForce GTX 465 vs Radeon HD 6850

Intro

The GeForce GTX 465 has a GPU core clock speed of 607 MHz, and the 1024 MB of GDDR5 RAM is set to run at 802 MHz through a 256-bit bus. It also is comprised of 352 SPUs, 44 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 6850, which features GPU clock speed of 775 MHz, and 1024 MB of GDDR5 RAM running at 1000 MHz through a 256-bit bus. It also features 960 Stream Processors, 48 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 465 200 Watts
Difference: 73 Watts (57%)

Memory Bandwidth

The Radeon HD 6850, in theory, should perform much faster than the GeForce GTX 465 in general. (explain)

Radeon HD 6850 128000 MB/sec
GeForce GTX 465 102592 MB/sec
Difference: 25408 (25%)

Texel Rate

The Radeon HD 6850 is quite a bit (more or less 39%) more effective at anisotropic filtering than the GeForce GTX 465. (explain)

Radeon HD 6850 37200 Mtexels/sec
GeForce GTX 465 26708 Mtexels/sec
Difference: 10492 (39%)

Pixel Rate

The Radeon HD 6850 will be a lot (approximately 28%) faster with regards to anti-aliasing than the GeForce GTX 465, and able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 465 19424 Mpixels/sec
Difference: 5376 (28%)

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 465

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 465 Radeon HD 6850
Manufacturer nVidia AMD
Year May 2010 October 2010
Code Name GF100 Barts Pro
Memory 1024 MB 1024 MB
Core Speed 607 MHz 775 MHz
Memory Speed 3208 MHz 4000 MHz
Power (Max TDP) 200 watts 127 watts
Bandwidth 102592 MB/sec 128000 MB/sec
Texel Rate 26708 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 19424 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 352 960
Texture Mapping Units 44 48
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-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: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the card's clock speed. 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 rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GTX 465

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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