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GeForce GTX 650 vs Radeon HD 7850


The GeForce GTX 650 features a GPU core speed of 1058 MHz, and the 2048 MB of GDDR5 RAM is set to run at 1250 MHz through a 128-bit bus. It also is made up of 384 SPUs, 32 Texture Address Units, and 16 Raster Operation Units.

Compare those specifications to the Radeon HD 7850, which makes use of a 28 nm design. AMD has set the core speed at 860 MHz. The GDDR5 memory runs at a frequency of 1200 MHz on this specific card. It features 1024 SPUs along with 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650 64 Watts
Radeon HD 7850 130 Watts
Difference: 66 Watts (103%)

Memory Bandwidth

Performance-wise, the Radeon HD 7850 should in theory be quite a bit superior to the GeForce GTX 650 overall. (explain)

Radeon HD 7850 153600 MB/sec
GeForce GTX 650 80000 MB/sec
Difference: 73600 (92%)

Texel Rate

The Radeon HD 7850 should be a lot (approximately 63%) faster with regards to texture filtering than the GeForce GTX 650. (explain)

Radeon HD 7850 55040 Mtexels/sec
GeForce GTX 650 33856 Mtexels/sec
Difference: 21184 (63%)

Pixel Rate

The Radeon HD 7850 is quite a bit (approximately 63%) more effective at anti-aliasing than the GeForce GTX 650, and capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7850 27520 Mpixels/sec
GeForce GTX 650 16928 Mpixels/sec
Difference: 10592 (63%)

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

Radeon HD 7850

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.


Display Specifications

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Model GeForce GTX 650 Radeon HD 7850
Manufacturer nVidia AMD
Year September 2012 March 2012
Code Name GK107 Pitcairn Pro
Memory 2048 MB 2048 MB
Core Speed 1058 MHz 860 MHz
Memory Speed 5000 MHz 4800 MHz
Power (Max TDP) 64 watts 130 watts
Bandwidth 80000 MB/sec 153600 MB/sec
Texel Rate 33856 Mtexels/sec 55040 Mtexels/sec
Pixel Rate 16928 Mpixels/sec 27520 Mpixels/sec
Unified Shaders 384 1024
Texture Mapping Units 32 64
Render Output Units 16 32
Bus Type GDDR5 GDDR5
Bus Width 128-bit 256-bit
Fab Process 28 nm 28 nm
Transistors 1300 million 2800 million
Bus PCIe 3.0 x16 PCIe 3.0 x16
DirectX Version DirectX 11.0 DirectX 11.1
OpenGL Version OpenGL 4.3 OpenGL 4.2

Memory Bandwidth: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This figure is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the clock speed of the card. 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 quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.


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