GeForce GT 315 vs Radeon HD 6570 (OEM) 2GB

Intro

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

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 2GB		50 Watts
GeForce GT 315		52 Watts
	Difference: 2 Watts (4%)

Memory Bandwidth

In theory, the Radeon HD 6570 (OEM) 2GB should be quite a bit faster than the GeForce GT 315 overall. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
GeForce GT 315		25280 MB/sec
	Difference: 38720 (153%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB should be a lot (about 56%) more effective at texture filtering than the GeForce GT 315. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
GeForce GT 315		10000 Mtexels/sec
	Difference: 5600 (56%)

Pixel Rate

The Radeon HD 6570 (OEM) 2GB is a little bit (more or less 4%) more effective at AA than the GeForce GT 315, and able to handle higher screen resolutions without losing too much performance. (explain)

Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
GeForce GT 315		5000 Mpixels/sec
	Difference: 200 (4%)

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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be moved past the external memory interface within a second. It's worked out by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher 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 amount of texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core 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 processed in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.