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Geforce GTX 680 vs Radeon HD 4830 512MB

Intro

The Geforce GTX 680 comes with a core clock frequency of 1006 MHz and a GDDR5 memory speed of 1502 MHz. It also makes use of a 256-bit memory bus, and uses a 28 nm design. It is made up of 1536 SPUs, 128 TAUs, and 32 ROPs.

Compare those specs to the Radeon HD 4830 512MB, which comes with core speeds of 575 MHz on the GPU, and 900 MHz on the 512 MB of GDDR3 memory. It features 640(128x5) SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4830 512MB 95 Watts
Geforce GTX 680 195 Watts
Difference: 100 Watts (105%)

Memory Bandwidth

Theoretically speaking, the Geforce GTX 680 should perform a lot faster than the Radeon HD 4830 512MB in general. (explain)

Geforce GTX 680 192256 MB/sec
Radeon HD 4830 512MB 57600 MB/sec
Difference: 134656 (234%)

Texel Rate

The Geforce GTX 680 is a lot (about 600%) more effective at anisotropic filtering than the Radeon HD 4830 512MB. (explain)

Geforce GTX 680 128768 Mtexels/sec
Radeon HD 4830 512MB 18400 Mtexels/sec
Difference: 110368 (600%)

Pixel Rate

The Geforce GTX 680 should be quite a bit (more or less 250%) more effective at AA than the Radeon HD 4830 512MB, and also able to handle higher resolutions without losing too much performance. (explain)

Geforce GTX 680 32192 Mpixels/sec
Radeon HD 4830 512MB 9200 Mpixels/sec
Difference: 22992 (250%)

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 680

Amazon.com

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Radeon HD 4830 512MB

Amazon.com

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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 680 Radeon HD 4830 512MB
Manufacturer nVidia AMD
Year March 2012 Oct 21, 2008
Code Name GK104 RV770 LE
Memory 2048 MB 512 MB
Core Speed 1006 MHz 575 MHz
Memory Speed 6008 MHz 1800 MHz
Power (Max TDP) 195 watts 95 watts
Bandwidth 192256 MB/sec 57600 MB/sec
Texel Rate 128768 Mtexels/sec 18400 Mtexels/sec
Pixel Rate 32192 Mpixels/sec 9200 Mpixels/sec
Unified Shaders 1536 640(128x5)
Texture Mapping Units 128 32
Render Output Units 32 16
Bus Type GDDR5 GDDR3
Bus Width 256-bit 256-bit
Fab Process 28 nm 55 nm
Transistors 3540 million 956 million
Bus PCIe 3.0 x16 PCIe 2.0 x16
DirectX Version DirectX 11.0 DirectX 10.1
OpenGL Version OpenGL 4.2 OpenGL 3.0

Memory Bandwidth: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transported over the external memory interface in one second. The number is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 once 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 AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount 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 fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.

Display Prices

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Geforce GTX 680

Amazon.com

Check prices at:

Radeon HD 4830 512MB

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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