Radeon HD 7850 vs Radeon HD 7950

Intro

Compare those specifications to the Radeon HD 7950, which comes with GPU clock speed of 800 MHz, and 1536 MB of GDDR5 RAM running at 1250 MHz through a 384-bit bus. It also features 1792 Stream Processors, 112 Texture Address Units, and 32 Raster Operation 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 7950		7731 points
Radeon HD 7850		5200 points
	Difference: 2531 (49%)

Zcash Mining Hash Rate

Radeon HD 7950		235 Sol/s
Radeon HD 7850		171 Sol/s
	Difference: 64 (37%)

Ethereum Mining Hash Rate

Radeon HD 7950		21 Mh/s
Radeon HD 7850		13 Mh/s
	Difference: 8 (62%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Radeon HD 7950		200 Watts
	Difference: 70 Watts (54%)

Memory Bandwidth

In theory, the Radeon HD 7950 should be 56% faster than the Radeon HD 7850 overall, due to its greater bandwidth. (explain)

Radeon HD 7950		240000 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 86400 (56%)

Texel Rate

The Radeon HD 7950 should be much (approximately 63%) better at anisotropic filtering than the Radeon HD 7850. (explain)

Radeon HD 7950		89600 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 34560 (63%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 7850 is a better choice, but it probably won't make a huge difference. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 7950		25600 Mpixels/sec
	Difference: 1920 (8%)

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 max amount of data (in units of megabytes per second) that can be transported past the external memory interface in a second. It's calculated by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly record to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to get to the max fill rate.