Radeon HD 3650 vs Radeon R9 280X

Intro

Compare those specifications to the Radeon R9 280X, which has GPU core speed of 850 MHz, and 3072 MB of GDDR5 RAM running at 1500 MHz through a 384-bit bus. It also is comprised of 2048 SPUs, 128 TAUs, and 32 ROPs.

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

Theoretically, the Radeon R9 280X should be quite a bit faster than the Radeon HD 3650 in general. (explain)

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

Texel Rate

The Radeon R9 280X should be much (about 1776%) faster with regards to texture filtering than the Radeon HD 3650. (explain)

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

Pixel Rate

The Radeon R9 280X will be quite a bit (about 838%) more effective at full screen anti-aliasing than the Radeon HD 3650, and will be able to handle higher screen resolutions more effectively. (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: Bandwidth is the max amount of information (counted in megabytes per second) that can be transported across the external memory interface in one second. It's worked out by multiplying the interface width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, 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 amount of texture map elements (texels) that are applied in one second. This figure is worked out by multiplying the total texture units by the core clock speed of the chip. The higher the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of ROPs 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 fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.