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

Intro

The GeForce 9400 GT 256MB makes use of a 65 nm design. nVidia has clocked the core frequency at 550 MHz. The GDDR2 RAM is set to run at a speed of 400 MHz on this specific model. It features 16 SPUs as well as 8 Texture Address Units and 4 Rasterization Operator Units.

Compare that to the Radeon HD 6670 (OEM) 1GB, which features core speeds of 800 MHz on the GPU, and 1000 MHz on the 1024 MB of GDDR5 memory. It features 480 SPUs along with 24 Texture Address Units and 8 ROPs.

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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

The Radeon HD 6670 (OEM) 1GB should in theory perform much faster 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 will be much (approximately 336%) faster with regards to texture filtering 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

The Radeon HD 6670 (OEM) 1GB is a lot (more or less 191%) better at AA than the GeForce 9400 GT 256MB, and also should be capable of handling higher resolutions without losing too much performance. (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: Memory bandwidth is the max amount of information (measured in MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR memory, it must be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, 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 number of texture map elements (texels) that are processed per second. This figure is worked out by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to its local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of colour ROPs by the the core 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 rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential 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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