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GeForce 9400 GT 256MB vs Radeon HD 5450

Intro

The GeForce 9400 GT 256MB makes use of a 65 nm design. nVidia has set the core speed at 550 MHz. The GDDR2 RAM runs at a frequency of 400 MHz on this particular model. It features 16 SPUs along with 8 Texture Address Units and 4 ROPs.

Compare all that to the Radeon HD 5450, which features a GPU core clock speed of 650 MHz, and 512 MB of DDR3 memory running at 800 MHz through a 64-bit bus. It also features 80(16x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 5450 19 Watts
GeForce 9400 GT 256MB 50 Watts
Difference: 31 Watts (163%)

Memory Bandwidth

Both cards have the exact same bandwidth, so theoretically they should have identical performance. (explain)

Texel Rate

The Radeon HD 5450 should be a bit (more or less 18%) faster with regards to anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 5450 5200 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 800 (18%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 5450 is a better choice, but not by far. (explain)

Radeon HD 5450 2600 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 400 (18%)

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

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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.

Specifications

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Model GeForce 9400 GT 256MB Radeon HD 5450
Manufacturer nVidia AMD
Year August 2008 February 4, 2010
Code Name G96a Cedar PRO
Memory 256 MB 512 MB
Core Speed 550 MHz 650 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) 50 watts 19 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 4400 Mtexels/sec 5200 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 2600 Mpixels/sec
Unified Shaders 16 80(16x5)
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR2 DDR3
Bus Width 128-bit 64-bit
Fab Process 65 nm 40 nm
Transistors 314 million 292 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: Bandwidth is the max amount of information (measured in MB per second) that can be transported past the external memory interface in one second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 amount of texture map elements (texels) that are processed per second. This is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, the better the video 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 maximum amount of pixels the graphics card could possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

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GeForce 9400 GT 256MB

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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