Radeon HD 4890 1GB vs Radeon R9 380X

Intro

Compare all of that to the Radeon R9 380X, which uses a 28 nm design. AMD has set the core speed at 970 MHz. The GDDR5 RAM works at a frequency of 1425 MHz on this particular card. It features 2048 SPUs along with 128 TAUs and 32 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically, the Radeon R9 380X should perform a lot faster than the Radeon HD 4890 1GB in general. (explain)

Radeon R9 380X		182400 MB/sec
Radeon HD 4890 1GB		124800 MB/sec
	Difference: 57600 (46%)

Texel Rate

The Radeon R9 380X is quite a bit (approximately 210%) more effective at anisotropic filtering than the Radeon HD 4890 1GB. (explain)

Radeon R9 380X		124160 Mtexels/sec
Radeon HD 4890 1GB		40000 Mtexels/sec
	Difference: 84160 (210%)

Pixel Rate

The Radeon R9 380X should be a lot (about 94%) faster with regards to AA than the Radeon HD 4890 1GB, and also will be able to handle higher screen resolutions more effectively. (explain)

Radeon R9 380X		31040 Mpixels/sec
Radeon HD 4890 1GB		16000 Mpixels/sec
	Difference: 15040 (94%)

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 information (counted in megabytes per second) that can be moved past the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR RAM, it should be multiplied by 2 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 anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are applied in one second. This figure is calculated by multiplying the total texture units by the core clock 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 applied in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of ROPs by the clock 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 is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.