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GeForce GT 320 vs Radeon HD 4730

Intro

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

Compare those specifications to the Radeon HD 4730, which features a core clock speed of 700 MHz and a GDDR5 memory frequency of 900 MHz. It also uses a 128-bit bus, and makes use of a 55 nm design. It is comprised of 640(128x5) 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 4730 140 Watts
Difference: 97 Watts (226%)

Memory Bandwidth

The Radeon HD 4730 should theoretically be much faster than the GeForce GT 320 overall. (explain)

Radeon HD 4730 57600 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 32320 (128%)

Texel Rate

The Radeon HD 4730 should be a lot (approximately 73%) better at texture filtering than the GeForce GT 320. (explain)

Radeon HD 4730 22400 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 9440 (73%)

Pixel Rate

The Radeon HD 4730 will be quite a bit (more or less 30%) better at anti-aliasing than the GeForce GT 320, and should be able to handle higher screen resolutions better. (explain)

Radeon HD 4730 5600 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 1280 (30%)

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 4730

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 4730
Manufacturer nVidia AMD
Year February 2010 Jun 8, 2009
Code Name GT215 RV770/CE
Memory 1024 MB 512 MB
Core Speed 540 MHz 700 MHz
Memory Speed 1580 MHz 3600 MHz
Power (Max TDP) 43 watts 140 watts
Bandwidth 25280 MB/sec 57600 MB/sec
Texel Rate 12960 Mtexels/sec 22400 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 5600 Mpixels/sec
Unified Shaders 72 640(128x5)
Texture Mapping Units 24 32
Render Output Units 8 8
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 55 nm
Transistors 727 million 956 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 information (counted in megabytes per second) that can be moved across the external memory interface in one second. It's calculated by multiplying the card's interface width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card can possibly record to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 4730

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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