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GeForce GT 320 vs Radeon HD 3690/3830

Intro

The GeForce GT 320 makes use of a 40 nm design. nVidia has set the core frequency at 540 MHz. The GDDR3 memory runs at a frequency of 790 MHz on this particular model. It features 72 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Compare that to the Radeon HD 3690/3830, which makes use of a 55 nm design. AMD has clocked the core speed at 668 MHz. The GDDR3 RAM runs at a frequency of 828 MHz on this specific model. It features 320(64x5) SPUs along with 16 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 3690/3830 75 Watts
Difference: 32 Watts (74%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 3690/3830 should perform a small bit faster than the GeForce GT 320 in general. (explain)

Radeon HD 3690/3830 26496 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 1216 (5%)

Texel Rate

The GeForce GT 320 will be much (about 21%) better at AF than the Radeon HD 3690/3830. (explain)

GeForce GT 320 12960 Mtexels/sec
Radeon HD 3690/3830 10688 Mtexels/sec
Difference: 2272 (21%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 3690/3830 is the winner, and very much so. (explain)

Radeon HD 3690/3830 10688 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 6368 (147%)

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 GT 320

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 GT 320 Radeon HD 3690/3830
Manufacturer nVidia AMD
Year February 2010 2008
Code Name GT215 RV670 PRO
Memory 1024 MB 256 MB
Core Speed 540 MHz 668 MHz
Memory Speed 1580 MHz 1656 MHz
Power (Max TDP) 43 watts 75 watts
Bandwidth 25280 MB/sec 26496 MB/sec
Texel Rate 12960 Mtexels/sec 10688 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 10688 Mpixels/sec
Unified Shaders 72 320(64x5)
Texture Mapping Units 24 16
Render Output Units 8 16
Bus Type GDDR3 GDDR3
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 727 million (Unknown) million
Bus PCIe x16 PCIe 2.0 x16
DirectX Version DirectX 10.1 DirectX 10.1
OpenGL Version OpenGL 3.3 OpenGL 3.0

Memory Bandwidth: Bandwidth is the max amount of information (measured in MB 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 the speed of its memory. If it uses DDR type RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed in one second. This figure is worked out by multiplying the total amount of texture units by the core speed of the chip. The better 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 maximum number of pixels the video card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce GT 320

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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