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GeForce GTX 295 vs Radeon HD 6850

Intro

The GeForce GTX 295 comes with a clock frequency of 576 MHz and a GDDR3 memory frequency of 999 MHz. It also makes use of a 448-bit memory bus, and uses a 55 nm design. It features 240 SPUs, 80 Texture Address Units, and 28 Raster Operation Units.

Compare those specs to the Radeon HD 6850, which has a GPU core clock speed of 775 MHz, and 1024 MB of GDDR5 RAM set to run at 1000 MHz through a 256-bit bus. It also features 960 Stream Processors, 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

The GeForce GTX 295, in theory, should be much faster than the Radeon HD 6850 overall. (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 (about 148%) better 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

If using a high screen resolution is important to you, then the GeForce GTX 295 is superior to the Radeon HD 6850, by a large margin. (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: Memory bandwidth is the max amount of data (counted in MB per second) that can be moved past 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 RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen 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 this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Raster Operations Pipelines by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum 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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