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GeForce 9400 GT 256MB vs Radeon HD 6450 (OEM)

Intro

The GeForce 9400 GT 256MB features a clock speed of 550 MHz and a GDDR2 memory speed of 400 MHz. It also makes use of a 128-bit bus, and makes use of a 65 nm design. It is comprised of 16 SPUs, 8 TAUs, and 4 Raster Operation Units.

Compare those specs to the Radeon HD 6450 (OEM), which has core speeds of 625 MHz on the GPU, and 800 MHz on the 512 MB of GDDR3 memory. It features 160 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6450 (OEM) 31 Watts
GeForce 9400 GT 256MB 50 Watts
Difference: 19 Watts (61%)

Memory Bandwidth

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

Texel Rate

The Radeon HD 6450 (OEM) will be a small bit (approximately 14%) more effective at anisotropic filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6450 (OEM) 5000 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 600 (14%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon HD 6450 (OEM) is the winner, but it probably won't make a huge difference. (explain)

Radeon HD 6450 (OEM) 2500 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 300 (14%)

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 6450 (OEM)

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 6450 (OEM)
Manufacturer nVidia AMD
Year August 2008 February 2011
Code Name G96a Caicos
Memory 256 MB 512 MB
Core Speed 550 MHz 625 MHz
Memory Speed 800 MHz 1600 MHz
Power (Max TDP) 50 watts 31 watts
Bandwidth 12800 MB/sec 12800 MB/sec
Texel Rate 4400 Mtexels/sec 5000 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 2500 Mpixels/sec
Unified Shaders 16 160
Texture Mapping Units 8 8
Render Output Units 4 4
Bus Type GDDR2 GDDR3
Bus Width 128-bit 64-bit
Fab Process 65 nm 40 nm
Transistors 314 million 370 million
Bus PCIe x16 2.0, PCI PCIe 2.1 x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of information (in units of MB per second) that can be transported across the external memory interface in one second. It's calculated by multiplying the card's bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video 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 amount of Render Output Units by the the core 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 rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

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GeForce 9400 GT 256MB

Amazon.com

Check prices at:

Radeon HD 6450 (OEM)

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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