GeForce 9400 GT 256MB vs Radeon HD 6570 (OEM) 2GB

Intro

Compare those specifications to the Radeon HD 6570 (OEM) 2GB, which comes with a clock speed of 650 MHz and a GDDR5 memory frequency of 1000 MHz. It also features a 128-bit bus, and makes use of a 40 nm design. It is comprised of 480 SPUs, 24 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

The Radeon HD 6570 (OEM) 2GB, in theory, should perform a lot faster than the GeForce 9400 GT 256MB overall. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
GeForce 9400 GT 256MB		12800 MB/sec
	Difference: 51200 (400%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB should be a lot (approximately 255%) more effective at AF than the GeForce 9400 GT 256MB. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
GeForce 9400 GT 256MB		4400 Mtexels/sec
	Difference: 11200 (255%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB is a lot (more or less 136%) more effective at full screen anti-aliasing than the GeForce 9400 GT 256MB, and also should be capable of handling higher screen resolutions more effectively. (explain)

Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
GeForce 9400 GT 256MB		2200 Mpixels/sec
	Difference: 3000 (136%)

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 maximum amount of data (measured in MB per second) that can be moved across the external memory interface within a second. It is calculated by multiplying the interface width by its memory speed. In the case of DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.