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GeForce 9400 GT 256MB vs Radeon HD 6670 (OEM) 1GB

Intro

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

Compare those specifications to the Radeon HD 6670 (OEM) 1GB, which has GPU core speed of 800 MHz, and 1024 MB of GDDR5 memory 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 Raster Operation Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB 50 Watts
Radeon HD 6670 (OEM) 1GB 63 Watts
Difference: 13 Watts (26%)

Memory Bandwidth

Performance-wise, the Radeon HD 6670 (OEM) 1GB should theoretically be much better than the GeForce 9400 GT 256MB in general. (explain)

Radeon HD 6670 (OEM) 1GB 64000 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 51200 (400%)

Texel Rate

The Radeon HD 6670 (OEM) 1GB is quite a bit (more or less 336%) more effective at AF than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6670 (OEM) 1GB 19200 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 14800 (336%)

Pixel Rate

If using a high screen resolution is important to you, then the Radeon HD 6670 (OEM) 1GB is a better choice, by far. (explain)

Radeon HD 6670 (OEM) 1GB 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) 1GB

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) 1GB
Manufacturer nVidia AMD
Year August 2008 February 2011
Code Name G96a Turks
Memory 256 MB 1024 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: Bandwidth is the largest amount of data (counted in MB per second) that can be transported past the external memory interface within a second. It's calculated by multiplying the card's bus width by its memory speed. In the case of DDR type RAM, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.

Display Prices

Hide Prices

GeForce 9400 GT 256MB

Amazon.com

Check prices at:

Radeon HD 6670 (OEM) 1GB

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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