Radeon HD 7870 XT vs Radeon R9 380 4G

Intro

Compare all of that to the Radeon R9 380 4G, which features GPU core speed of 970 MHz, and 4096 MB of GDDR5 RAM running at 1425 MHz through a 256-bit bus. It also features 1792 SPUs, 112 TAUs, 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 R9 380 4G		8837 points
Radeon HD 7870 XT		6390 points
	Difference: 2447 (38%)

Ethereum Mining Hash Rate

Radeon R9 380 4G		21 Mh/s
Radeon HD 7870 XT		15 Mh/s
	Difference: 6 (40%)

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7870 XT		185 Watts
Radeon R9 380 4G		190 Watts
	Difference: 5 Watts (3%)

Memory Bandwidth

The Radeon HD 7870 XT should theoretically perform just a bit faster than the Radeon R9 380 4G in general. (explain)

Radeon HD 7870 XT		192000 MB/sec
Radeon R9 380 4G		182400 MB/sec
	Difference: 9600 (5%)

Texel Rate

The Radeon R9 380 4G should be quite a bit (about 22%) more effective at AF than the Radeon HD 7870 XT. (explain)

Radeon R9 380 4G		108640 Mtexels/sec
Radeon HD 7870 XT		88800 Mtexels/sec
	Difference: 19840 (22%)

Pixel Rate

The Radeon R9 380 4G is a little bit (approximately 5%) faster with regards to full screen anti-aliasing than the Radeon HD 7870 XT, and also should be capable of handling higher screen resolutions without losing too much performance. (explain)

Radeon R9 380 4G		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 max amount of data (in units of MB per second) that can be transported over the external memory interface in a second. The number is worked out by multiplying the card's interface width by its memory speed. In the case of DDR memory, it should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, the faster 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 number of texture map elements (texels) that can be applied in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The better this number, the better the graphics card will be at 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 that the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.