Radeon HD 3650 512MB vs Radeon HD 7750

Intro

Compare those specifications to the Radeon HD 7750, which makes use of a 28 nm design. AMD has clocked the core frequency at 800 MHz. The GDDR5 RAM runs at a speed of 1125 MHz on this specific model. It features 512 SPUs along with 32 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 7750		55 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 23 Watts (42%)

Memory Bandwidth

Theoretically, the Radeon HD 7750 should perform much faster than the Radeon HD 3650 512MB overall. (explain)

Radeon HD 7750		72000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 46400 (181%)

Texel Rate

The Radeon HD 7750 is quite a bit (approximately 341%) better at AF than the Radeon HD 3650 512MB. (explain)

Radeon HD 7750		25600 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 19800 (341%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7750 is the winner, and very much so. (explain)

Radeon HD 7750		12800 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 9900 (341%)

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 maximum amount of information (in units of MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the interface width by its memory clock speed. In the case of DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card could possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of colour ROPs by the the core clock speed. 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 quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.