Radeon HD 4830 512MB vs Radeon HD 6570 (OEM) 1GB

Intro

Compare that to the Radeon HD 6570 (OEM) 1GB, which features GPU clock speed of 650 MHz, and 1024 MB of GDDR3 memory set to run at 900 MHz through a 128-bit bus. It also is made up of 480 SPUs, 24 TAUs, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB		50 Watts
Radeon HD 4830 512MB		95 Watts
	Difference: 45 Watts (90%)

Memory Bandwidth

Performance-wise, the Radeon HD 4830 512MB should theoretically be much superior to the Radeon HD 6570 (OEM) 1GB overall. (explain)

Radeon HD 4830 512MB		57600 MB/sec
Radeon HD 6570 (OEM) 1GB		28800 MB/sec
	Difference: 28800 (100%)

Texel Rate

The Radeon HD 4830 512MB will be a small bit (more or less 18%) better at AF than the Radeon HD 6570 (OEM) 1GB. (explain)

Radeon HD 4830 512MB		18400 Mtexels/sec
Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
	Difference: 2800 (18%)

Pixel Rate

The Radeon HD 4830 512MB is quite a bit (approximately 77%) faster with regards to FSAA than the Radeon HD 6570 (OEM) 1GB, and should be able to handle higher screen resolutions while still performing well. (explain)

Radeon HD 4830 512MB		9200 Mpixels/sec
Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
	Difference: 4000 (77%)

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 (counted in MB per second) that can be transported over the external memory interface in a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This number is calculated by multiplying the total number of 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the amount of colour ROPs by the clock 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 also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.