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

Intro

The GeForce 9400 GT 256MB features clock speeds of 550 MHz on the GPU, and 400 MHz on the 256 MB of GDDR2 memory. It features 16 SPUs as well as 8 TAUs and 4 Rasterization Operator Units.

Compare those specifications to the Radeon HD 6450 (OEM), which uses a 40 nm design. AMD has set the core frequency at 625 MHz. The GDDR3 memory runs at a frequency of 800 MHz on this model. 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 exactly the same bandwidth, so in theory they should have the same performance. (explain)

Texel Rate

The Radeon HD 6450 (OEM) should be a little bit (more or less 14%) faster with regards to 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

The Radeon HD 6450 (OEM) is a bit (more or less 14%) faster with regards to anti-aliasing than the GeForce 9400 GT 256MB, and will be capable of handling higher resolutions better. (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: Memory bandwidth is the largest amount of data (measured in megabytes per second) that can be moved over the external memory interface within a second. The number is worked out by multiplying the interface width by the speed of its memory. If the card has DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster 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 applied per second. This is worked out by multiplying the total number of texture units of the card by the core speed of the chip. The higher 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 one 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 calculated by multiplying the number of Raster Operations Pipelines by the the card's clock speed. 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 many other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability 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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