Radeon HD 4790 vs Radeon R7 260X

Intro

Compare all of that to the Radeon R7 260X, which features core clock speeds of 1100 MHz on the GPU, and 1625 MHz on the 2048 MB of GDDR5 RAM. It features 896 SPUs along with 56 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the Radeon R7 260X should theoretically be a small bit superior to the Radeon HD 4790 in general. (explain)

Radeon R7 260X		104000 MB/sec
Radeon HD 4790		102400 MB/sec
	Difference: 1600 (2%)

Texel Rate

The Radeon R7 260X will be a lot (approximately 221%) faster with regards to anisotropic filtering than the Radeon HD 4790. (explain)

Radeon R7 260X		61600 Mtexels/sec
Radeon HD 4790		19200 Mtexels/sec
	Difference: 42400 (221%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon R7 260X is superior to the Radeon HD 4790, and very much so. (explain)

Radeon R7 260X		17600 Mpixels/sec
Radeon HD 4790		9600 Mpixels/sec
	Difference: 8000 (83%)

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 maximum amount of data (in units of MB per second) that can be moved across the external memory interface within a second. It's calculated by multiplying the interface width by its memory clock speed. If it uses DDR memory, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The higher the card's memory bandwidth, 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 texture map elements (texels) that are applied in one second. This is calculated by multiplying the total amount of texture units of the card by the core clock 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 in one 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. The number is calculated by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.