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GeForce 9400 GT 256MB vs Radeon HD 6670 (OEM)

Intro

The GeForce 9400 GT 256MB has core clock speeds of 550 MHz on the GPU, and 400 MHz on the 256 MB of GDDR2 RAM. It features 16 SPUs as well as 8 Texture Address Units and 4 ROPs.

Compare those specs to the Radeon HD 6670 (OEM), which has a GPU core clock speed of 800 MHz, and 512 MB of GDDR5 RAM set to run at 1000 MHz through a 128-bit bus. It also is made up of 480 Stream Processors, 24 Texture Address Units, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB 50 Watts
Radeon HD 6670 (OEM) 63 Watts
Difference: 13 Watts (26%)

Memory Bandwidth

In theory, the Radeon HD 6670 (OEM) is 400% quicker than the GeForce 9400 GT 256MB overall, due to its greater bandwidth. (explain)

Radeon HD 6670 (OEM) 64000 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 51200 (400%)

Texel Rate

The Radeon HD 6670 (OEM) is a lot (approximately 336%) more effective at AF than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6670 (OEM) 19200 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 14800 (336%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 6670 (OEM) is the winner, and very much so. (explain)

Radeon HD 6670 (OEM) 6400 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 4200 (191%)

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 6670 (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 6670 (OEM)
Manufacturer nVidia AMD
Year August 2008 February 2011
Code Name G96a Turks
Memory 256 MB 512 MB
Core Speed 550 MHz 800 MHz
Memory Speed 800 MHz 4000 MHz
Power (Max TDP) 50 watts 63 watts
Bandwidth 12800 MB/sec 64000 MB/sec
Texel Rate 4400 Mtexels/sec 19200 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 6400 Mpixels/sec
Unified Shaders 16 480
Texture Mapping Units 8 24
Render Output Units 4 8
Bus Type GDDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 314 million 715 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 (counted in MB per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR RAM, it should be multiplied by 2 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, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on lots of 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 6670 (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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