Radeon HD 3650 512MB vs Radeon HD 6750

Intro

Compare all that to the Radeon HD 6750, which makes use of a 40 nm design. AMD has clocked the core speed at 725 MHz. The GDDR5 RAM is set to run at a frequency of 1000 MHz on this particular model. It features 720 SPUs as well as 36 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
Radeon HD 6750		86 Watts
	Difference: 8 Watts (10%)

Memory Bandwidth

The Radeon HD 6750 should theoretically perform quite a bit faster than the Radeon HD 3650 512MB in general. (explain)

Radeon HD 6750		64000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 38400 (150%)

Texel Rate

The Radeon HD 6750 will be a lot (approximately 350%) faster with regards to anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 6750		26100 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 20300 (350%)

Pixel Rate

If using a high resolution is important to you, then the Radeon HD 6750 is a better choice, and very much so. (explain)

Radeon HD 6750		11600 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 8700 (300%)

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 megabytes per second) that can be transferred across the external memory interface in one second. The number is calculated by multiplying the card's bus width by the speed of its memory. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. 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 number of texture map elements (texels) that can be applied per second. This figure is worked out by multiplying the total texture units by the core speed of the chip. The higher the texel rate, the better the card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the video card could possibly write to the local memory in one second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel output rate is also dependant on quite a few other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.