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GeForce GT 320 vs Radeon HD 3690/3830

Intro

The GeForce GT 320 comes with a clock speed of 540 MHz and a GDDR3 memory speed of 790 MHz. It also uses a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 72 SPUs, 24 Texture Address Units, and 8 Raster Operation Units.

Compare that to the Radeon HD 3690/3830, which has core speeds of 668 MHz on the GPU, and 828 MHz on the 256 MB of GDDR3 memory. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 Rasterization Operator Units.

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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

The Radeon HD 3690/3830 should in theory perform a 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 is much (approximately 21%) more effective at texture filtering 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

The Radeon HD 3690/3830 will be quite a bit (about 147%) faster with regards to anti-aliasing than the GeForce GT 320, and should be capable of handling higher screen resolutions without slowing down too much. (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 largest amount of data (in units of MB per second) that can be transferred past the external memory interface in a second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result 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, High Dynamic Range and high resolutions.

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