Radeon HD 3650 vs Radeon HD 6770

Intro

Compare those specifications to the Radeon HD 6770, which has a clock speed of 900 MHz and a GDDR5 memory frequency of 1050 MHz. It also makes use of a 128-bit bus, and uses a 40 nm design. It is made up of 800 SPUs, 40 TAUs, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
Radeon HD 6770		108 Watts
	Difference: 30 Watts (38%)

Memory Bandwidth

In theory, the Radeon HD 6770 should be a lot faster than the Radeon HD 3650 overall. (explain)

Radeon HD 6770		67200 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 41600 (163%)

Texel Rate

The Radeon HD 6770 is much (more or less 521%) more effective at AF than the Radeon HD 3650. (explain)

Radeon HD 6770		36000 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 30200 (521%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the Radeon HD 6770 is a better choice, by a large margin. (explain)

Radeon HD 6770		14400 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 11500 (397%)

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 largest amount of information (in units of MB per second) that can be transported past the external memory interface in one second. The number is worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once 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 higher screen resolutions.

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

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Raster Operations Pipelines by the the core clock speed. 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 fill rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.