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GeForce GTX 460 1GB vs Radeon HD 6850

Intro

The GeForce GTX 460 1GB makes use of a 40 nm design. nVidia has clocked the core speed at 675 MHz. The GDDR5 RAM is set to run at a frequency of 900 MHz on this model. It features 336 SPUs as well as 56 TAUs and 32 ROPs.

Compare all that to the Radeon HD 6850, which comes with core clock speeds of 775 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 RAM. It features 960 SPUs as well as 48 Texture Address Units and 32 ROPs.

(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

Theoretically, the Radeon HD 6850 should be a small bit faster than the GeForce GTX 460 1GB overall. (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 just a bit (more or less 2%) more effective at 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

If running with a high screen resolution is important to you, then the Radeon HD 6850 is a better choice, but it probably won't make a huge difference. (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 information (measured in MB per second) that can be transferred over the external memory interface in a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type RAM, it must be multiplied by 2 again. If it uses 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 amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum 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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