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GeForce GTX 650 vs Radeon HD 6950 2GB

Intro

The GeForce GTX 650 features a GPU core speed of 1058 MHz, and the 1024 MB of GDDR5 RAM runs at 1250 MHz through a 128-bit bus. It also is made up of 384 SPUs, 32 TAUs, and 16 ROPs.

Compare all of that to the Radeon HD 6950 2GB, which has core speeds of 800 MHz on the GPU, and 1250 MHz on the 2048 MB of GDDR5 memory. It features 1408 SPUs along with 88 TAUs and 32 Rasterization Operator Units.

Display Graphs

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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

Theoretically, the Radeon HD 6950 2GB should be much faster than the GeForce GTX 650 overall. (explain)

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

Texel Rate

The Radeon HD 6950 2GB is 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 will be a lot (more or less 51%) better at full screen anti-aliasing than the GeForce GTX 650, and capable of handling higher resolutions without losing too much performance. (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 max amount of information (measured in megabytes per second) that can be transported past the external memory interface in one second. It is calculated by multiplying the interface width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per 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 card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to 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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