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GeForce GT 320 vs Radeon HD 4670 1GB

Intro

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

Compare all of that to the Radeon HD 4670 1GB, which comes with a clock speed of 750 MHz and a GDDR4/GDDR3/DDR3/DDR2 memory speed of 1100 MHz. It also features a 128-bit bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 32 Texture Address Units, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 4670 1GB 70 Watts
Difference: 27 Watts (63%)

Memory Bandwidth

The Radeon HD 4670 1GB should theoretically perform quite a bit faster than the GeForce GT 320 in general. (explain)

Radeon HD 4670 1GB 35200 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 9920 (39%)

Texel Rate

The Radeon HD 4670 1GB is quite a bit (about 85%) better at anisotropic filtering than the GeForce GT 320. (explain)

Radeon HD 4670 1GB 24000 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 11040 (85%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon HD 4670 1GB is the winner, and very much so. (explain)

Radeon HD 4670 1GB 6000 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 1680 (39%)

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 4670 1GB

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 4670 1GB
Manufacturer nVidia AMD
Year February 2010 Sep 10, 2008
Code Name GT215 RV730 XT
Memory 1024 MB 1024 MB
Core Speed 540 MHz 750 MHz
Memory Speed 1580 MHz 2200 MHz
Power (Max TDP) 43 watts 70 watts
Bandwidth 25280 MB/sec 35200 MB/sec
Texel Rate 12960 Mtexels/sec 24000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 6000 Mpixels/sec
Unified Shaders 72 320(64x5)
Texture Mapping Units 24 32
Render Output Units 8 8
Bus Type GDDR3 GDDR4/GDDR3/DDR3/DDR2
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 727 million 514 million
Bus PCIe x16 PCIe 2.0 x16, AGP 8x
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 data (counted in megabytes per second) that can be moved across the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, 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 can be processed in one second. This is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics 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 amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant 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 4670 1GB

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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