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GeForce GTX 650 vs Radeon HD 6950 2GB

Intro

The GeForce GTX 650 has a GPU core speed of 1058 MHz, and the 1024 MB of GDDR5 memory runs at 1250 MHz through a 128-bit bus. It also features 384 Stream Processors, 32 Texture Address Units, and 16 ROPs.

Compare all of that to the Radeon HD 6950 2GB, which uses a 40 nm design. AMD has set the core frequency at 800 MHz. The GDDR5 RAM runs at a frequency of 1250 MHz on this particular model. It features 1408 SPUs along with 88 Texture Address Units and 32 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 6950 2GB 200 Watts
Difference: 136 Watts (213%)

Memory Bandwidth

In theory, the Radeon HD 6950 2GB will be 100% faster than the GeForce GTX 650 overall, because of its higher data rate. (explain)

Radeon HD 6950 2GB 160000 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 80000 (100%)

Texel Rate

The Radeon HD 6950 2GB will be quite a bit (about 108%) more effective at anisotropic filtering than the GeForce GTX 650. (explain)

Radeon HD 6950 2GB 70400 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 36544 (108%)

Pixel Rate

The Radeon HD 6950 2GB is much (more or less 51%) faster with regards to AA than the GeForce GTX 650, and will be capable of handling higher resolutions more effectively. (explain)

Radeon HD 6950 2GB 25600 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 8672 (51%)

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

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GeForce GTX 650

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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 650 Radeon HD 6950 2GB
Manufacturer nVidia AMD
Year September 2012 December 2010
Code Name GK107 Cayman Pro
Memory 1024 MB 2048 MB
Core Speed 1058 MHz 800 MHz
Memory Speed 5000 MHz 5000 MHz
Power (Max TDP) 64 watts 200 watts
Bandwidth 80000 MB/sec 160000 MB/sec
Texel Rate 33856 Mtexels/sec 70400 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 25600 Mpixels/sec
Unified Shaders 384 1408
Texture Mapping Units 32 88
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 40 nm
Transistors 1300 million 2640 million
Bus PCIe 3.0 x16 PCIe x16
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.3 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (measured in MB per second) that can be transported over the external memory interface in a second. The number is calculated by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units of the card by the core 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 a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Raster Operations Pipelines by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.

Display Prices

Hide Prices

GeForce GTX 650

Amazon.com

Check prices at:

Radeon HD 6950 2GB

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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