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GeForce 9400 GT 256MB vs Radeon HD 5550

Intro

The GeForce 9400 GT 256MB has a GPU core speed of 550 MHz, and the 256 MB of GDDR2 RAM is set to run at 400 MHz through a 128-bit bus. It also is made up of 16 SPUs, 8 TAUs, and 4 ROPs.

Compare all of that 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 is comprised of 320(64x5) SPUs, 16 TAUs, and 8 ROPs.

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

Both cards have exactly the same bandwidth, so theoretically they should perform exactly the same. (explain)

Texel Rate

The Radeon HD 5550 will be much (about 100%) faster with regards to anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 5550 8800 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 4400 (100%)

Pixel Rate

The Radeon HD 5550 is a lot (more or less 100%) better at anti-aliasing than the GeForce 9400 GT 256MB, and should be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 5550 4400 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 2200 (100%)

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 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 9400 GT 256MB Radeon HD 5550
Manufacturer nVidia AMD
Year August 2008 February 9, 2010
Code Name G96a Redwood LE
Memory 256 MB 512 MB
Core Speed 550 MHz 550 MHz
Memory Speed 800 MHz 800 MHz
Power (Max TDP) 50 watts (Unknown) watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 4400 Mtexels/sec 8800 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 4400 Mpixels/sec
Unified Shaders 16 320(64x5)
Texture Mapping Units 8 16
Render Output Units 4 8
Bus Type GDDR2 DDR2
Bus Width 128-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 314 million 627 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 data (measured in megabytes per second) that can be moved past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are applied in one second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly record to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the 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 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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