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GeForce 9400 GT 256MB vs Radeon HD 6750 1GB

Intro

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

Compare all that to the Radeon HD 6750 1GB, which uses a 40 nm design. AMD has set the core speed at 725 MHz. The GDDR5 RAM runs at a speed of 1000 MHz on this particular card. It features 720 SPUs as well as 36 Texture Address Units and 16 Rasterization Operator Units.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9400 GT 256MB 50 Watts
Radeon HD 6750 1GB 86 Watts
Difference: 36 Watts (72%)

Memory Bandwidth

The Radeon HD 6750 1GB should in theory be much faster than the GeForce 9400 GT 256MB in general. (explain)

Radeon HD 6750 1GB 64000 MB/sec
GeForce 9400 GT 256MB 12800 MB/sec
Difference: 51200 (400%)

Texel Rate

The Radeon HD 6750 1GB will be quite a bit (more or less 493%) more effective at texture filtering than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6750 1GB 26100 Mtexels/sec
GeForce 9400 GT 256MB 4400 Mtexels/sec
Difference: 21700 (493%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6750 1GB is superior to the GeForce 9400 GT 256MB, by far. (explain)

Radeon HD 6750 1GB 11600 Mpixels/sec
GeForce 9400 GT 256MB 2200 Mpixels/sec
Difference: 9400 (427%)

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

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Radeon HD 6750 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 6750 1GB
Manufacturer nVidia AMD
Year August 2008 January 2011
Code Name G96a Juniper Pro
Memory 256 MB 1024 MB
Core Speed 550 MHz 725 MHz
Memory Speed 800 MHz 4000 MHz
Power (Max TDP) 50 watts 86 watts
Bandwidth 12800 MB/sec 64000 MB/sec
Texel Rate 4400 Mtexels/sec 26100 Mtexels/sec
Pixel Rate 2200 Mpixels/sec 11600 Mpixels/sec
Unified Shaders 16 720
Texture Mapping Units 8 36
Render Output Units 4 16
Bus Type GDDR2 GDDR5
Bus Width 128-bit 128-bit
Fab Process 65 nm 40 nm
Transistors 314 million 1040 million
Bus PCIe x16 2.0, PCI PCIe x16
DirectX Version DirectX 10 DirectX 11
OpenGL Version OpenGL 3.0 OpenGL 4.1

Memory Bandwidth: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported over the external memory interface within a second. The number is calculated by multiplying the interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total texture units of the card by the core clock 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - 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 6750 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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