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GeForce GT 320 vs Radeon HD 5550

Intro

The GeForce GT 320 comes with core speeds of 540 MHz on the GPU, and 790 MHz on the 1024 MB of GDDR3 RAM. It features 72 SPUs along with 24 Texture Address Units and 8 Rasterization Operator Units.

Compare those specifications to the Radeon HD 5550, which comes with a clock frequency of 550 MHz and a DDR2 memory speed of 400 MHz. It also features a 128-bit memory bus, and makes use of a 40 nm design. It features 320(64x5) SPUs, 16 TAUs, and 8 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce GT 320 should in theory be quite a bit faster than the Radeon HD 5550 in general. (explain)

GeForce GT 320 25280 MB/sec
Radeon HD 5550 12800 MB/sec
Difference: 12480 (98%)

Texel Rate

The GeForce GT 320 should be much (approximately 47%) more effective at texture filtering than the Radeon HD 5550. (explain)

GeForce GT 320 12960 Mtexels/sec
Radeon HD 5550 8800 Mtexels/sec
Difference: 4160 (47%)

Pixel Rate

The Radeon HD 5550 should be a little bit (more or less 2%) faster with regards to FSAA than the GeForce GT 320, and also will be able to handle higher screen resolutions better. (explain)

Radeon HD 5550 4400 Mpixels/sec
GeForce GT 320 4320 Mpixels/sec
Difference: 80 (2%)

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 5550

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 5550
Manufacturer nVidia AMD
Year February 2010 February 9, 2010
Code Name GT215 Redwood LE
Memory 1024 MB 512 MB
Core Speed 540 MHz 550 MHz
Memory Speed 1580 MHz 800 MHz
Power (Max TDP) 43 watts (Unknown) watts
Bandwidth 25280 MB/sec 12800 MB/sec
Texel Rate 12960 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 4320 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 72 320(64x5)
Texture Mapping Units 24 16
Render Output Units 8 8
Bus Type GDDR3 DDR2
Bus Width 128-bit 128-bit
Fab Process 40 nm 40 nm
Transistors 727 million 627 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 (measured in MB per second) that can be transported across the external memory interface in one second. It is worked out by multiplying the interface width by its memory speed. In the case of DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 can be applied per second. This is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce GT 320

Amazon.com

Check prices at:

Radeon HD 5550

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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