Radeon HD 4830 1GB vs Radeon R9 M375X

Intro

Compare those specs to the Radeon R9 M375X, which uses a 28 nm design. AMD has set the core frequency at 1015 MHz. The GDDR5 RAM runs at a frequency of 1125 MHz on this particular card. It features 640 SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The Radeon R9 M375X, in theory, should perform much faster than the Radeon HD 4830 1GB in general. (explain)

Radeon R9 M375X		72000 MB/sec
Radeon HD 4830 1GB		57600 MB/sec
	Difference: 14400 (25%)

Texel Rate

The Radeon R9 M375X should be quite a bit (more or less 121%) faster with regards to AF than the Radeon HD 4830 1GB. (explain)

Radeon R9 M375X		40600 Mtexels/sec
Radeon HD 4830 1GB		18400 Mtexels/sec
	Difference: 22200 (121%)

Pixel Rate

The Radeon R9 M375X is a lot (more or less 77%) faster with regards to full screen anti-aliasing than the Radeon HD 4830 1GB, and able to handle higher resolutions without losing too much performance. (explain)

Radeon R9 M375X		16240 Mpixels/sec
Radeon HD 4830 1GB		9200 Mpixels/sec
	Difference: 7040 (77%)

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 largest amount of data (in units of megabytes per second) that can be transported over the external memory interface in one second. It is calculated by multiplying the bus width by its memory speed. If it uses DDR memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by ANOTHER 2x. The higher the 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 amount of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total number of texture units by the core speed of the chip. The higher this number, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels per second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics chip can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Raster Operations Pipelines by the clock 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 fill rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.