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GeForce GT 320 vs Radeon HD 3690/3830

Intro

The GeForce GT 320 has core clock speeds of 540 MHz on the GPU, and 790 MHz on the 1024 MB of GDDR3 RAM. It features 72 SPUs as well as 24 TAUs 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 frequency at 668 MHz. The GDDR3 memory works at a frequency of 828 MHz on this particular card. It features 320(64x5) SPUs as well as 16 Texture Address Units and 16 ROPs.

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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

Performance-wise, the Radeon HD 3690/3830 should theoretically be a little bit superior to 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 a lot (about 21%) faster with regards to anisotropic 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

If using a high screen resolution is important to you, then the Radeon HD 3690/3830 is superior to the GeForce GT 320, by a large margin. (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: Memory bandwidth is the maximum amount of data (counted in MB per second) that can be transferred past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to 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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