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GeForce GT 320 vs Radeon HD 3470 256MB

Intro

The GeForce GT 320 has 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 all that to the Radeon HD 3470 256MB, which has GPU core speed of 800 MHz, and 256 MB of DDR2 memory running at 950 MHz through a 128-bit bus. It also is made up of 40(8x5) SPUs, 4 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

In theory, the Radeon HD 3470 256MB should be 20% faster than the GeForce GT 320 in general, due to its higher data rate. (explain)

Radeon HD 3470 256MB 30400 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 5120 (20%)

Texel Rate

The GeForce GT 320 will be much (approximately 305%) more effective at anisotropic filtering than the Radeon HD 3470 256MB. (explain)

GeForce GT 320 12960 Mtexels/sec
Radeon HD 3470 256MB 3200 Mtexels/sec
Difference: 9760 (305%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GT 320 is the winner, and very much so. (explain)

GeForce GT 320 4320 Mpixels/sec
Radeon HD 3470 256MB 3200 Mpixels/sec
Difference: 1120 (35%)

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 3470 256MB

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 3470 256MB
Manufacturer nVidia AMD
Year February 2010 2008
Code Name GT215 RV620 PRO
Memory 1024 MB 256 MB
Core Speed 540 MHz 800 MHz
Memory Speed 1580 MHz 1900 MHz
Power (Max TDP) 43 watts (Unknown) watts
Bandwidth 25280 MB/sec 30400 MB/sec
Texel Rate 12960 Mtexels/sec 3200 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 3200 Mpixels/sec
Unified Shaders 72 40(8x5)
Texture Mapping Units 24 4
Render Output Units 8 4
Bus Type GDDR3 DDR2
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 max amount of data (in units of megabytes per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per 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 this number, the better the video 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 number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 3470 256MB

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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