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GeForce GTX 480 vs Radeon HD 3690/3830

Intro

The GeForce GTX 480 features a GPU core speed of 700 MHz, and the 1536 MB of GDDR5 RAM is set to run at 924 MHz through a 384-bit bus. It also is made up of 480 Stream Processors, 60 Texture Address Units, and 48 ROPs.

Compare those specifications to the Radeon HD 3690/3830, which comes with a core clock frequency of 668 MHz and a GDDR3 memory speed of 828 MHz. It also features a 128-bit memory bus, and uses a 55 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830 75 Watts
GeForce GTX 480 250 Watts
Difference: 175 Watts (233%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 480 is 570% quicker than the Radeon HD 3690/3830 in general, because of its higher bandwidth. (explain)

GeForce GTX 480 177408 MB/sec
Radeon HD 3690/3830 26496 MB/sec
Difference: 150912 (570%)

Texel Rate

The GeForce GTX 480 will be a lot (more or less 293%) faster with regards to texture filtering than the Radeon HD 3690/3830. (explain)

GeForce GTX 480 42000 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 31312 (293%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 480 is the winner, by a large margin. (explain)

GeForce GTX 480 33600 Mpixels/sec
Radeon HD 3690/3830 10688 Mpixels/sec
Difference: 22912 (214%)

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 480

Amazon.com

Check prices at:

Radeon HD 3690/3830

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 480 Radeon HD 3690/3830
Manufacturer nVidia AMD
Year March 2010 2008
Code Name GF100 RV670 PRO
Memory 1536 MB 256 MB
Core Speed 700 MHz 668 MHz
Memory Speed 3696 MHz 1656 MHz
Power (Max TDP) 250 watts 75 watts
Bandwidth 177408 MB/sec 26496 MB/sec
Texel Rate 42000 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 33600 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 480 320(64x5)
Texture Mapping Units 60 16
Render Output Units 48 16
Bus Type GDDR5 GDDR3
Bus Width 384-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 3000 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 11 DirectX 10.1
OpenGL Version OpenGL 4.1 OpenGL 3.0

Memory Bandwidth: Bandwidth is the maximum amount of data (in units of megabytes per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the bus width by its memory speed. In the case of DDR type RAM, it should be multiplied by 2 again. If 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 in one second. This number is calculated by multiplying the total texture units of the card by the core 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

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GeForce GTX 480

Amazon.com

Check prices at:

Radeon HD 3690/3830

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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