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GeForce 9400 GT 256MB vs Radeon HD 5830

Intro

The GeForce 9400 GT 256MB comes with a clock frequency of 550 MHz and a GDDR2 memory speed of 400 MHz. It also makes use of a 128-bit bus, and uses a 65 nm design. It is made up of 16 SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Compare those specifications to the Radeon HD 5830, which features core speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 1120(224x5) SPUs as well as 56 TAUs and 16 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB 50 Watts
Radeon HD 5830 175 Watts
Difference: 125 Watts (250%)

Memory Bandwidth

The Radeon HD 5830, in theory, should perform a lot faster than the GeForce 9400 GT 256MB overall. (explain)

Radeon HD 5830 128000 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 115200 (900%)

Texel Rate

The Radeon HD 5830 will be quite a bit (approximately 918%) more effective at texture filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 5830 44800 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 40400 (918%)

Pixel Rate

The Radeon HD 5830 is a lot (more or less 482%) faster with regards to anti-aliasing than the GeForce 9400 GT 256MB, and also will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 5830 12800 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 10600 (482%)

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 9400 GT 256MB

Amazon.com

Check prices at:

Radeon HD 5830

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 9400 GT 256MB Radeon HD 5830
Manufacturer nVidia AMD
Year August 2008 February 25, 2010
Code Name G96a Cypress LE
Memory 256 MB 1024 MB
Core Speed 550 MHz 800 MHz
Memory Speed 800 MHz 4000 MHz
Power (Max TDP) 50 watts 175 watts
Bandwidth 12800 MB/sec 128000 MB/sec
Texel Rate 4400 Mtexels/sec 44800 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 12800 Mpixels/sec
Unified Shaders 16 1120(224x5)
Texture Mapping Units 8 56
Render Output Units 4 16
Bus Type GDDR2 GDDR5
Bus Width 128-bit 256-bit
Fab Process 65 nm 40 nm
Transistors 314 million 2154 million
Bus PCIe x16 2.0, PCI PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 3.2

Memory Bandwidth: Memory bandwidth is the max amount of information (counted in MB per second) that can be transferred past the external memory interface in one second. It's calculated by multiplying the bus width by its memory clock speed. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better 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 can be applied per second. This number 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 graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could 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 colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.

Display Prices

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GeForce 9400 GT 256MB

Amazon.com

Check prices at:

Radeon HD 5830

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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