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GeForce GTX 295 vs Radeon HD 6850

Intro

The GeForce GTX 295 comes with clock speeds of 576 MHz on the GPU, and 999 MHz on the 896 MB of GDDR3 memory. It features 240 SPUs along with 80 Texture Address Units and 28 ROPs.

Compare all that to the Radeon HD 6850, which uses a 40 nm design. AMD has set the core speed at 775 MHz. The GDDR5 RAM runs at a frequency of 1000 MHz on this specific card. It features 960 SPUs along with 48 Texture Address Units and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6850 127 Watts
GeForce GTX 295 289 Watts
Difference: 162 Watts (128%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 295 should in theory be much better than the Radeon HD 6850 in general. (explain)

GeForce GTX 295 223776 MB/sec
Radeon HD 6850 128000 MB/sec
Difference: 95776 (75%)

Texel Rate

The GeForce GTX 295 is a lot (more or less 148%) more effective at texture filtering than the Radeon HD 6850. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 6850 37200 Mtexels/sec
Difference: 54960 (148%)

Pixel Rate

The GeForce GTX 295 is quite a bit (approximately 30%) faster with regards to anti-aliasing than the Radeon HD 6850, and also will be able to handle higher resolutions without slowing down too much. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 6850 24800 Mpixels/sec
Difference: 7456 (30%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

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GeForce GTX 295

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 295 Radeon HD 6850
Manufacturer nVidia AMD
Year January 8, 2009 October 2010
Code Name G200b Barts Pro
Memory 896 MB (x2) 1024 MB
Core Speed 576 MHz (x2) 775 MHz
Memory Speed 1998 MHz (x2) 4000 MHz
Power (Max TDP) 289 watts 127 watts
Bandwidth 223776 MB/sec 128000 MB/sec
Texel Rate 92160 Mtexels/sec 37200 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 24800 Mpixels/sec
Unified Shaders 240 (x2) 960
Texture Mapping Units 80 (x2) 48
Render Output Units 28 (x2) 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit (x2) 256-bit
Fab Process 55 nm 40 nm
Transistors 1400 million 1700 million
Bus PCIe x16 2.0 PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.1 OpenGL 4.1

Memory Bandwidth: Bandwidth is the max amount of information (counted in megabytes per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the card's bus width by its memory speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GTX 295

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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