Radeon HD 4850 2GB vs Radeon HD 6570 (OEM) 1GB

Intro

Compare all of that to the Radeon HD 6570 (OEM) 1GB, which uses a 40 nm design. AMD has set the core frequency at 650 MHz. The GDDR3 memory is set to run at a speed of 900 MHz on this model. It features 480 SPUs along with 24 TAUs and 8 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB		50 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 60 Watts (120%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 4850 2GB should perform quite a bit faster than the Radeon HD 6570 (OEM) 1GB in general. (explain)

Radeon HD 4850 2GB		63552 MB/sec
Radeon HD 6570 (OEM) 1GB		28800 MB/sec
	Difference: 34752 (121%)

Texel Rate

The Radeon HD 4850 2GB will be much (more or less 60%) faster with regards to texture filtering than the Radeon HD 6570 (OEM) 1GB. (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
	Difference: 9400 (60%)

Pixel Rate

The Radeon HD 4850 2GB should be much (about 92%) faster with regards to FSAA than the Radeon HD 6570 (OEM) 1GB, and able to handle higher resolutions without slowing down too much. (explain)

Radeon HD 4850 2GB		10000 Mpixels/sec
Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
	Difference: 4800 (92%)

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 (in units of MB per second) that can be transported past the external memory interface in a second. It is worked out by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 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 better 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of 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 fill rate also depends on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.