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GeForce GT 320 vs Radeon HD 5450

Intro

The GeForce GT 320 makes use of a 40 nm design. nVidia has set the core frequency at 540 MHz. The GDDR3 RAM works at a speed of 790 MHz on this model. It features 72 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Compare all that to the Radeon HD 5450, which features a core clock speed of 650 MHz and a DDR3 memory frequency of 800 MHz. It also uses a 64-bit bus, and uses a 40 nm design. It features 80(16x5) SPUs, 8 TAUs, and 4 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
GeForce GT 320 43 Watts
Difference: 24 Watts (126%)

Memory Bandwidth

In theory, the GeForce GT 320 should be 98% quicker than the Radeon HD 5450 in general, due to its greater data rate. (explain)

GeForce GT 320 25280 MB/sec
Radeon HD 5450 12800 MB/sec
Difference: 12480 (98%)

Texel Rate

The GeForce GT 320 is much (about 149%) better at texture filtering than the Radeon HD 5450. (explain)

GeForce GT 320 12960 Mtexels/sec
Radeon HD 5450 5200 Mtexels/sec
Difference: 7760 (149%)

Pixel Rate

The GeForce GT 320 is a lot (more or less 66%) faster with regards to AA than the Radeon HD 5450, and also will be able to handle higher screen resolutions while still performing well. (explain)

GeForce GT 320 4320 Mpixels/sec
Radeon HD 5450 2600 Mpixels/sec
Difference: 1720 (66%)

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 5450

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 5450
Manufacturer nVidia AMD
Year February 2010 February 4, 2010
Code Name GT215 Cedar PRO
Memory 1024 MB 512 MB
Core Speed 540 MHz 650 MHz
Memory Speed 1580 MHz 1600 MHz
Power (Max TDP) 43 watts 19 watts
Bandwidth 25280 MB/sec 12800 MB/sec
Texel Rate 12960 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 72 80(16x5)
Texture Mapping Units 24 8
Render Output Units 8 4
Bus Type GDDR3 DDR3
Bus Width 128-bit 64-bit
Fab Process 40 nm 40 nm
Transistors 727 million 292 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: Bandwidth is the max amount of data (counted in megabytes per second) that can be transferred across the external memory interface in a second. It's calculated by multiplying the card's bus width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied per second. This is calculated by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one 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 clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory 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 5450

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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