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GeForce GT 320 vs Radeon HD 5770

Intro

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

Compare all of that to the Radeon HD 5770, which has a GPU core clock speed of 850 MHz, and 1024 MB of GDDR5 memory running at 1200 MHz through a 128-bit bus. It also is comprised of 800(160x5) SPUs, 40 TAUs, and 16 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 320 43 Watts
Radeon HD 5770 108 Watts
Difference: 65 Watts (151%)

Memory Bandwidth

In theory, the Radeon HD 5770 should be much faster than the GeForce GT 320 in general. (explain)

Radeon HD 5770 76800 MB/sec
GeForce GT 320 25280 MB/sec
Difference: 51520 (204%)

Texel Rate

The Radeon HD 5770 will be a lot (more or less 162%) more effective at AF than the GeForce GT 320. (explain)

Radeon HD 5770 34000 Mtexels/sec
GeForce GT 320 12960 Mtexels/sec
Difference: 21040 (162%)

Pixel Rate

The Radeon HD 5770 is a lot (more or less 215%) more effective at full screen anti-aliasing than the GeForce GT 320, and should be capable of handling higher resolutions without slowing down too much. (explain)

Radeon HD 5770 13600 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 9280 (215%)

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 5770

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 5770
Manufacturer nVidia AMD
Year February 2010 October 13, 2009
Code Name GT215 Juniper XT
Memory 1024 MB 1024 MB
Core Speed 540 MHz 850 MHz
Memory Speed 1580 MHz 4800 MHz
Power (Max TDP) 43 watts 108 watts
Bandwidth 25280 MB/sec 76800 MB/sec
Texel Rate 12960 Mtexels/sec 34000 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 13600 Mpixels/sec
Unified Shaders 72 800(160x5)
Texture Mapping Units 24 40
Render Output Units 8 16
Bus Type GDDR3 GDDR5
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 727 million 1040 million
Bus PCIe x16 PCIe 2.1 x16
DirectX Version DirectX 10.1 DirectX 11
OpenGL Version OpenGL 3.3 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the maximum amount of information (counted in megabytes per second) that can be transferred across the external memory interface within a second. It's calculated by multiplying the bus width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This is worked out by multiplying the total texture units of the card by the core 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to its local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka 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 5770

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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