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

Intro

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

Compare all of that to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory is set to run at a frequency of 800 MHz on this particular model. It features 160 SPUs along with 8 Texture Address Units and 4 ROPs.

Display Graphs

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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 exactly the same memory bandwidth, so in theory they should perform exactly the same. (explain)

Texel Rate

The Radeon HD 6450 (OEM) is just a bit (about 14%) faster with regards to AF 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

The Radeon HD 6450 (OEM) is just a bit (about 14%) more effective at full screen anti-aliasing than the GeForce 9400 GT 256MB, and should be able to handle higher screen resolutions without losing too much performance. (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 max amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the card's interface width by its memory speed. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This figure is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, 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 that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the maximum fill rate.

Display Prices

Hide Prices

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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