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GeForce GTX 295 vs Radeon HD 6870

Intro

The GeForce GTX 295 has a GPU core speed of 576 MHz, and the 896 MB of GDDR3 memory is set to run at 999 MHz through a 448-bit bus. It also is comprised of 240 Stream Processors, 80 TAUs, and 28 Raster Operation Units.

Compare all that to the Radeon HD 6870, which comes with a GPU core clock speed of 900 MHz, and 1024 MB of GDDR5 memory running at 1050 MHz through a 256-bit bus. It also features 1120 SPUs, 56 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6870 151 Watts
GeForce GTX 295 289 Watts
Difference: 138 Watts (91%)

Memory Bandwidth

In theory, the GeForce GTX 295 should perform a lot faster than the Radeon HD 6870 overall. (explain)

GeForce GTX 295 223776 MB/sec
Radeon HD 6870 134400 MB/sec
Difference: 89376 (67%)

Texel Rate

The GeForce GTX 295 is much (about 83%) more effective at anisotropic filtering than the Radeon HD 6870. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 6870 50400 Mtexels/sec
Difference: 41760 (83%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GTX 295 is a better choice, not by a very large margin though. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 6870 28800 Mpixels/sec
Difference: 3456 (12%)

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 6870

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 6870
Manufacturer nVidia AMD
Year January 8, 2009 October 2010
Code Name G200b Barts XT
Memory 896 MB (x2) 1024 MB
Core Speed 576 MHz (x2) 900 MHz
Memory Speed 1998 MHz (x2) 4200 MHz
Power (Max TDP) 289 watts 151 watts
Bandwidth 223776 MB/sec 134400 MB/sec
Texel Rate 92160 Mtexels/sec 50400 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 28800 Mpixels/sec
Unified Shaders 240 (x2) 1120
Texture Mapping Units 80 (x2) 56
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 (in units of MB per second) that can be transferred past the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This is calculated by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher the texel rate, the better the 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 video card can possibly record to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 295

Amazon.com

Check prices at:

Radeon HD 6870

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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