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

Intro

Compare those specs to the Radeon HD 6450 (OEM), which features a clock speed of 625 MHz and a GDDR3 memory frequency of 800 MHz. It also features a 64-bit memory bus, and uses a 40 nm design. It is comprised of 160 SPUs, 8 TAUs, and 4 ROPs.

Display Graphs

Hide Graphs

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 the exact same bandwidth, so in theory they should perform the same. (explain)

Texel Rate

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

If running with high levels of AA is important to you, then the Radeon HD 6450 (OEM) is a better choice, but it probably won't make a huge difference. (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

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher 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 number of texture map elements (texels) that are processed in one second. This number is worked out by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.