Radeon HD 3650 vs Radeon R9 280X

Intro

Compare all of that to the Radeon R9 280X, which has core clock speeds of 850 MHz on the GPU, and 1500 MHz on the 3072 MB of GDDR5 memory. It features 2048 SPUs along with 128 TAUs and 32 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
Radeon R9 280X		250 Watts
	Difference: 172 Watts (221%)

Memory Bandwidth

The Radeon R9 280X, in theory, should be a lot faster than the Radeon HD 3650 overall. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 262400 (1025%)

Texel Rate

The Radeon R9 280X will be a lot (approximately 1776%) faster with regards to anisotropic filtering than the Radeon HD 3650. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 103000 (1776%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon R9 280X is the winner, and very much so. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 24300 (838%)

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 max amount of data (counted in MB per second) that can be transported across the external memory interface in a second. It's worked out by multiplying the card's interface width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in one 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 - also sometimes called 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 - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.