Radeon HD 4650 1GB vs Radeon R9 280X

Intro

Compare that to the Radeon R9 280X, which comes with 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 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4650 1GB		55 Watts
Radeon R9 280X		250 Watts
	Difference: 195 Watts (355%)

Memory Bandwidth

The Radeon R9 280X should in theory be much faster than the Radeon HD 4650 1GB in general. (explain)

Radeon R9 280X		288000 MB/sec
Radeon HD 4650 1GB		22400 MB/sec
	Difference: 265600 (1186%)

Texel Rate

The Radeon R9 280X should be much (more or less 467%) better at texture filtering than the Radeon HD 4650 1GB. (explain)

Radeon R9 280X		108800 Mtexels/sec
Radeon HD 4650 1GB		19200 Mtexels/sec
	Difference: 89600 (467%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the Radeon R9 280X is the winner, by far. (explain)

Radeon R9 280X		27200 Mpixels/sec
Radeon HD 4650 1GB		4800 Mpixels/sec
	Difference: 22400 (467%)

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 largest amount of information (measured in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If it uses DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.