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GeForce GTX 460 1GB vs Radeon HD 6850

Intro

The GeForce GTX 460 1GB uses a 40 nm design. nVidia has clocked the core speed at 675 MHz. The GDDR5 memory runs at a speed of 900 MHz on this card. It features 336 SPUs along with 56 TAUs and 32 Rasterization Operator Units.

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

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 460 1GB 160 Watts
Difference: 33 Watts (26%)

Memory Bandwidth

The Radeon HD 6850, in theory, should perform just a bit faster than the GeForce GTX 460 1GB in general. (explain)

Radeon HD 6850 128000 MB/sec
GeForce GTX 460 1GB 115200 MB/sec
Difference: 12800 (11%)

Texel Rate

The GeForce GTX 460 1GB is a little bit (more or less 2%) faster with regards to AF than the Radeon HD 6850. (explain)

GeForce GTX 460 1GB 37800 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 600 (2%)

Pixel Rate

The Radeon HD 6850 will be a bit (about 15%) faster with regards to anti-aliasing than the GeForce GTX 460 1GB, and also should be able to handle higher resolutions without losing too much performance. (explain)

Radeon HD 6850 24800 Mpixels/sec
GeForce GTX 460 1GB 21600 Mpixels/sec
Difference: 3200 (15%)

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 460 1GB

Amazon.com

Radeon HD 6850

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 460 1GB Radeon HD 6850
Manufacturer nVidia AMD
Year July 2010 October 2010
Code Name GF104 Barts Pro
Fab Process 40 nm 40 nm
Bus PCIe x16 PCIe x16
Memory 1024 MB 1024 MB
Core Speed 675 MHz 775 MHz
Shader Speed 1350 MHz (N/A) MHz
Memory Speed 900 MHz (3600 MHz effective) 1000 MHz (4000 MHz effective)
Unified Shaders 336 960
Texture Mapping Units 56 48
Render Output Units 32 32
Bus Type GDDR5 GDDR5
Bus Width 256-bit 256-bit
DirectX Version DirectX 11 DirectX 11
OpenGL Version OpenGL 4.1 OpenGL 4.1
Power (Max TDP) 160 watts 127 watts
Shader Model 5.0 5.0
Bandwidth 115200 MB/sec 128000 MB/sec
Texel Rate 37800 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 21600 Mpixels/sec 24800 Mpixels/sec

Memory Bandwidth: Memory bandwidth is the max amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, 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 applied per second. This is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the video 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 most pixels the video card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the max fill rate.

Comments

5 Responses to “GeForce GTX 460 1GB vs Radeon HD 6850”
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[...] Graphics Cards related queries here. Look at the comparisions here. GTX 460 and HD 6850: GeForce GTX 460 1GB vs Radeon HD 6850 – Performance Comparison Benchmarks @ Hardware Compare Winner -- HD 6850 GTX 550Ti and HD 6770 GeForce GTX 550 Ti vs Radeon HD 6770 – Performance [...]
bowss says:
HD 6850 CLEAR WINNER THIS CARD WILL LAST YOU 3-4 YEARS VERY GOOD PERFORMANCE TRUST ME !
[...] crossfired xD) If you're dead set on one of those two cards, the 6850 is the way to go (see here:GeForce GTX 460 1GB vs Radeon HD 6850 – Performance Comparison Benchmarks @ Hardware Compare) That CPU is pretty decent, it's 5th down from the top (See here: Gaming CPU Hierarchy Chart : [...]

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