Radeon HD 4830 1GB vs Radeon R9 M385X

Intro

Compare that to the Radeon R9 M385X, which comes with a clock speed of 1100 MHz and a GDDR5 memory speed of 1500 MHz. It also makes use of a 128-bit bus, and uses a 28 nm design. It is comprised of 896 SPUs, 56 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon R9 M385X should perform a lot faster than the Radeon HD 4830 1GB in general. (explain)

Radeon R9 M385X		96000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 38400 (67%)

Texel Rate

The Radeon R9 M385X will be a lot (about 235%) better at texture filtering than the Radeon HD 4830 1GB. (explain)

Radeon R9 M385X		61600 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 43200 (235%)

Pixel Rate

The Radeon R9 M385X will be much (approximately 91%) faster with regards to AA than the Radeon HD 4830 1GB, and also should be capable of handling higher screen resolutions while still performing well. (explain)

Radeon R9 M385X		17600 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 8400 (91%)

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 MB per second) that can be moved over the external memory interface within a second. It's calculated by multiplying the interface width by the speed of its memory. In the case of DDR memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the video card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the max fill rate.