Radeon HD 6570 (OEM) 2GB vs Radeon R7 240

Intro

Compare those specs to the Radeon R7 240, which features a clock frequency of 730 MHz and a DDR3 memory frequency of 900 MHz. It also features a 128-bit bus, and makes use of a 28 nm design. It is comprised of 320 SPUs, 20 Texture Address Units, and 8 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
Radeon HD 6570 (OEM) 2GB		50 Watts
	Difference: 20 Watts (67%)

Memory Bandwidth

In theory, the Radeon HD 6570 (OEM) 2GB will be 122% quicker than the Radeon R7 240 in general, because of its greater bandwidth. (explain)

Radeon HD 6570 (OEM) 2GB		64000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 35200 (122%)

Texel Rate

The Radeon HD 6570 (OEM) 2GB is a small bit (more or less 7%) faster with regards to texture filtering than the Radeon R7 240. (explain)

Radeon HD 6570 (OEM) 2GB		15600 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 1000 (7%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R7 240 is a better choice, not by a very large margin though. (explain)

Radeon R7 240		5840 Mpixels/sec
Radeon HD 6570 (OEM) 2GB		5200 Mpixels/sec
	Difference: 640 (12%)

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 max amount of data (counted in MB per second) that can be transported over the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The better this number, the better the graphics 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 amount of pixels the video card can possibly write to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.