Radeon HD 6570 (OEM) 1GB vs Radeon HD 6990

Intro

Compare that to the Radeon HD 6990, which has a core clock frequency of 830 MHz and a GDDR5 memory frequency of 1250 MHz. It also uses a 256-bit memory bus, and makes use of a 40 nm design. It features 1536 SPUs, 96 Texture Address Units, and 32 ROPs.

Display Graphs

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Benchmarks

These are real-world performance benchmarks that were submitted by Hardware Compare users. The scores seen here are the average of all benchmarks submitted for each respective test and hardware.

3DMark Fire Strike Graphics Score

Radeon HD 6990		5820 points
Radeon HD 6570 (OEM) 1GB		850 points
	Difference: 4970 (585%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 6570 (OEM) 1GB		50 Watts
Radeon HD 6990		375 Watts
	Difference: 325 Watts (650%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 6990 should be a lot faster than the Radeon HD 6570 (OEM) 1GB in general. (explain)

Radeon HD 6990		320000 MB/sec
Radeon HD 6570 (OEM) 1GB		28800 MB/sec
	Difference: 291200 (1011%)

Texel Rate

The Radeon HD 6990 should be quite a bit (more or less 922%) better at AF than the Radeon HD 6570 (OEM) 1GB. (explain)

Radeon HD 6990		159360 Mtexels/sec
Radeon HD 6570 (OEM) 1GB		15600 Mtexels/sec
	Difference: 143760 (922%)

Pixel Rate

The Radeon HD 6990 will be quite a bit (more or less 922%) faster with regards to anti-aliasing than the Radeon HD 6570 (OEM) 1GB, and will be capable of handling higher resolutions while still performing well. (explain)

Radeon HD 6990		53120 Mpixels/sec
Radeon HD 6570 (OEM) 1GB		5200 Mpixels/sec
	Difference: 47920 (922%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Memory bandwidth is the largest amount of data (in units of MB per second) that can be transported over the external memory interface in one second. The number is calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This is worked out by multiplying the total amount of texture units by the core clock 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 number of pixels the video card could 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 card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.