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GeForce GT 320 vs Radeon HD 3470 256MB

Intro

The GeForce GT 320 comes with a core clock speed of 540 MHz and a GDDR3 memory frequency of 790 MHz. It also uses a 128-bit bus, and uses a 40 nm design. It features 72 SPUs, 24 TAUs, and 8 ROPs.

Compare that to the Radeon HD 3470 256MB, which makes use of a 55 nm design. AMD has set the core frequency at 800 MHz. The DDR2 memory works at a frequency of 950 MHz on this specific card. It features 40(8x5) SPUs as well as 4 Texture Address Units and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Performance-wise, the Radeon HD 3470 256MB should theoretically be a little bit better than the GeForce GT 320 in general. (explain)

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

Texel Rate

The GeForce GT 320 is a lot (about 305%) faster with regards to texture 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 running with lots of anti-aliasing is important to you, then the GeForce GT 320 is superior to the Radeon HD 3470 256MB, by far. (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

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Radeon HD 3470 256MB

Amazon.com

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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 largest amount of information (counted in megabytes per second) that can be transferred past the external memory interface in one second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the 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 number of texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total 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 applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max 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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