GeForce GTX 660 vs Radeon HD 3650

Intro

Compare those specifications to the Radeon HD 3650, which makes use of a 55 nm design. AMD has clocked the core frequency at 725 MHz. The GDDR4 RAM works at a speed of 800 MHz on this particular model. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
GeForce GTX 660		140 Watts
	Difference: 62 Watts (79%)

Memory Bandwidth

Performance-wise, the GeForce GTX 660 should in theory be quite a bit better than the Radeon HD 3650 overall. (explain)

GeForce GTX 660		144192 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 118592 (463%)

Texel Rate

The GeForce GTX 660 is a lot (more or less 1252%) faster with regards to AF than the Radeon HD 3650. (explain)

GeForce GTX 660		78400 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 72600 (1252%)

Pixel Rate

The GeForce GTX 660 should be much (about 711%) more effective at AA than the Radeon HD 3650, and also able to handle higher screen resolutions better. (explain)

GeForce GTX 660		23520 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 20620 (711%)

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 information (measured in MB per second) that can be transferred across the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that are processed in one second. This is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, 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 the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.