Radeon HD 6790 vs Radeon HD 7850

Intro

Compare all of that to the Radeon HD 7850, which uses a 28 nm design. AMD has clocked the core speed at 860 MHz. The GDDR5 RAM is set to run at a speed of 1200 MHz on this model. It features 1024 SPUs as well as 64 TAUs and 32 Rasterization Operator Units.

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 7850		5200 points
Radeon HD 6790		2150 points
	Difference: 3050 (142%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Radeon HD 6790		150 Watts
	Difference: 20 Watts (15%)

Memory Bandwidth

The Radeon HD 7850 should theoretically be a little bit faster than the Radeon HD 6790 overall. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 6790		134400 MB/sec
	Difference: 19200 (14%)

Texel Rate

The Radeon HD 7850 will be quite a bit (more or less 64%) better at AF than the Radeon HD 6790. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 6790		33600 Mtexels/sec
	Difference: 21440 (64%)

Pixel Rate

The Radeon HD 7850 will be much (approximately 105%) faster with regards to AA than the Radeon HD 6790, and will be able to handle higher screen resolutions more effectively. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 6790		13440 Mpixels/sec
	Difference: 14080 (105%)

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 maximum amount of data (counted in MB per second) that can be transported across the external memory interface in one second. It is calculated by multiplying the interface width by its memory speed. If it uses DDR type RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed in one second. This is worked out by multiplying the total amount of texture units by the core speed of the chip. The better this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.