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GeForce GTX 295 vs Radeon HD 7950 3GB

Intro

The GeForce GTX 295 makes use of a 55 nm design. nVidia has clocked the core speed at 576 MHz. The GDDR3 RAM runs at a speed of 999 MHz on this card. It features 240 SPUs along with 80 Texture Address Units and 28 Rasterization Operator Units.

Compare that to the Radeon HD 7950 3GB, which features a GPU core clock speed of 800 MHz, and 3072 MB of GDDR5 RAM set to run at 1250 MHz through a 384-bit bus. It also is comprised of 1792 SPUs, 112 Texture Address Units, and 32 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7950 3GB 200 Watts
GeForce GTX 295 289 Watts
Difference: 89 Watts (45%)

Memory Bandwidth

The Radeon HD 7950 3GB should theoretically perform a small bit faster than the GeForce GTX 295 in general. (explain)

Radeon HD 7950 3GB 240000 MB/sec
GeForce GTX 295 223776 MB/sec
Difference: 16224 (7%)

Texel Rate

The GeForce GTX 295 will be a bit (more or less 3%) better at anisotropic filtering than the Radeon HD 7950 3GB. (explain)

GeForce GTX 295 92160 Mtexels/sec
Radeon HD 7950 3GB 89600 Mtexels/sec
Difference: 2560 (3%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 295 is a better choice, by a large margin. (explain)

GeForce GTX 295 32256 Mpixels/sec
Radeon HD 7950 3GB 25600 Mpixels/sec
Difference: 6656 (26%)

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 7950 3GB

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 7950 3GB
Manufacturer nVidia AMD
Year January 8, 2009 January 2012
Code Name G200b Tahiti Pro
Memory 896 MB (x2) 3072 MB
Core Speed 576 MHz (x2) 800 MHz
Memory Speed 1998 MHz (x2) 5000 MHz
Power (Max TDP) 289 watts 200 watts
Bandwidth 223776 MB/sec 240000 MB/sec
Texel Rate 92160 Mtexels/sec 89600 Mtexels/sec
Pixel Rate 32256 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 240 (x2) 1792
Texture Mapping Units 80 (x2) 112
Render Output Units 28 (x2) 32
Bus Type GDDR3 GDDR5
Bus Width 448-bit (x2) 384-bit
Fab Process 55 nm 28 nm
Transistors 1400 million 4313 million
Bus PCIe x16 2.0 PCIe 3.0 x16
DirectX Version DirectX 10 DirectX 11.1
OpenGL Version OpenGL 3.1 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the max amount of information (in units of megabytes per second) that can be moved past the external memory interface in one second. It is calculated by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster 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 are applied in one second. This is worked out by multiplying the total number of texture units of the card by the core clock speed of the chip. The higher this number, the better the graphics 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 that the graphics chip could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth of the card - 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 7950 3GB

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.

Comments

One Response to “GeForce GTX 295 vs Radeon HD 7950 3GB”
Pandore says:

Pas facile de voir la différence , mais avec l'OC de la 7950 elle devient rapidement supérieur a la 295 encore une fois limité ( direct X 10 )

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