Radeon HD 7870 XT vs Radeon R9 380X

Intro

Compare those specifications to the Radeon R9 380X, which features GPU clock speed of 970 MHz, and 4096 MB of GDDR5 memory running at 1425 MHz through a 256-bit bus. It also is comprised of 2048 SPUs, 128 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 R9 380X		9519 points
Radeon HD 7870 XT		6390 points
	Difference: 3129 (49%)

Ethereum Mining Hash Rate

Radeon R9 380X		19 Mh/s
Radeon HD 7870 XT		15 Mh/s
	Difference: 4 (27%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT		185 Watts
Radeon R9 380X		190 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

Theoretically speaking, the Radeon HD 7870 XT is 5% faster than the Radeon R9 380X in general, due to its greater data rate. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon R9 380X		182400 MB/sec
	Difference: 9600 (5%)

Texel Rate

The Radeon R9 380X will be quite a bit (approximately 40%) better at texture filtering than the Radeon HD 7870 XT. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 35360 (40%)

Pixel Rate

The Radeon R9 380X will be a small bit (about 5%) faster with regards to full screen anti-aliasing than the Radeon HD 7870 XT, and able to handle higher resolutions while still performing well. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon HD 7870 XT		29600 Mpixels/sec
	Difference: 1440 (5%)

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 maximum amount of data (counted in megabytes per second) that can be transferred over the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per 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 graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.