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Geforce GTX 680 vs Radeon HD 5750 1GB

Intro

The Geforce GTX 680 features a clock speed of 1006 MHz and a GDDR5 memory frequency of 1502 MHz. It also features a 256-bit memory bus, and makes use of a 28 nm design. It features 1536 SPUs, 128 TAUs, and 32 Raster Operation Units.

Compare those specifications to the Radeon HD 5750 1GB, which features core speeds of 700 MHz on the GPU, and 1150 MHz on the 1024 MB of GDDR5 RAM. It features 720(144x5) SPUs as well as 36 Texture Address Units and 16 Rasterization Operator Units.

(No game benchmarks for this combination yet.)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5750 1GB 86 Watts
Geforce GTX 680 195 Watts
Difference: 109 Watts (127%)

Memory Bandwidth

The Geforce GTX 680, in theory, should perform much faster than the Radeon HD 5750 1GB overall. (explain)

Geforce GTX 680 192256 MB/sec
Radeon HD 5750 1GB 73600 MB/sec
Difference: 118656 (161%)

Texel Rate

The Geforce GTX 680 will be much (about 411%) better at AF than the Radeon HD 5750 1GB. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 5750 1GB 25200 Mtexels/sec
Difference: 103568 (411%)

Pixel Rate

The Geforce GTX 680 should be a lot (more or less 187%) more effective at anti-aliasing than the Radeon HD 5750 1GB, and also will be able to handle higher resolutions while still performing well. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 5750 1GB 11200 Mpixels/sec
Difference: 20992 (187%)

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

Geforce GTX 680

Amazon.com

Radeon HD 5750 1GB

Amazon.com

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

Model Geforce GTX 680 Radeon HD 5750 1GB
Manufacturer nVidia AMD
Year March 2012 October 13, 2009
Code Name GK104 Juniper LE
Fab Process 28 nm 40 nm
Bus PCIe 3.0 x16 PCIe 2.1 x16
Memory 2048 MB 1024 MB
Core Speed 1006 MHz 700 MHz
Shader Speed 1006 MHz (N/A) MHz
Memory Speed 1502 MHz (6008 MHz effective) 1150 MHz (4600 MHz effective)
Unified Shaders 1536 720(144x5)
Texture Mapping Units 128 36
Render Output Units 32 16
Bus Type GDDR5 GDDR5
Bus Width 256-bit 128-bit
DirectX Version DirectX 11.0 DirectX 11
OpenGL Version OpenGL 4.2 OpenGL 3.2
Power (Max TDP) 195 watts 86 watts
Shader Model 5.0 5.0
Bandwidth 192256 MB/sec 73600 MB/sec
Texel Rate 128768 Mtexels/sec 25200 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 11200 Mpixels/sec

Memory Bandwidth: Bandwidth is the max amount of data (measured in megabytes per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied in one second. This number is calculated by multiplying the total number of texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics 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 card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

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