Radeon HD 7850 vs Radeon R9 390X 8G

Intro

Compare those specifications to the Radeon R9 390X 8G, which features a core clock speed of 1050 MHz and a GDDR5 memory speed of 1500 MHz. It also uses a 512-bit memory bus, and makes use of a 28 nm design. It is comprised of 2816 SPUs, 176 TAUs, and 64 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 R9 390X 8G		13555 points
Radeon HD 7850		5200 points
	Difference: 8355 (161%)

Zcash Mining Hash Rate

Radeon R9 390X 8G		330 Sol/s
Radeon HD 7850		171 Sol/s
	Difference: 159 (93%)

Ethereum Mining Hash Rate

Radeon R9 390X 8G		32 Mh/s
Radeon HD 7850		13 Mh/s
	Difference: 19 (146%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7850		130 Watts
Radeon R9 390X 8G		275 Watts
	Difference: 145 Watts (112%)

Memory Bandwidth

Theoretically speaking, the Radeon R9 390X 8G should perform quite a bit faster than the Radeon HD 7850 in general. (explain)

Radeon R9 390X 8G		384000 MB/sec
Radeon HD 7850		153600 MB/sec
	Difference: 230400 (150%)

Texel Rate

The Radeon R9 390X 8G is much (about 236%) faster with regards to AF than the Radeon HD 7850. (explain)

Radeon R9 390X 8G		184800 Mtexels/sec
Radeon HD 7850		55040 Mtexels/sec
	Difference: 129760 (236%)

Pixel Rate

If using high levels of AA is important to you, then the Radeon R9 390X 8G is superior to the Radeon HD 7850, by a large margin. (explain)

Radeon R9 390X 8G		67200 Mpixels/sec
Radeon HD 7850		27520 Mpixels/sec
	Difference: 39680 (144%)

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 megabytes per second) that can be moved past the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory speed. If it uses DDR type memory, it must be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the clock speed of the card. 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 also depends on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.