Radeon HD 3650 512MB vs Radeon HD 7850

Intro

Compare those specifications to the Radeon HD 7850, which has core speeds of 860 MHz on the GPU, and 1200 MHz on the 2048 MB of GDDR5 RAM. It features 1024 SPUs as well as 64 Texture Address Units and 32 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
Radeon HD 7850		130 Watts
	Difference: 52 Watts (67%)

Memory Bandwidth

The Radeon HD 7850 should theoretically be quite a bit faster than the Radeon HD 3650 512MB overall. (explain)

Radeon HD 7850		153600 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 128000 (500%)

Texel Rate

The Radeon HD 7850 is much (more or less 849%) more effective at anisotropic filtering than the Radeon HD 3650 512MB. (explain)

Radeon HD 7850		55040 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 49240 (849%)

Pixel Rate

The Radeon HD 7850 is a lot (about 849%) faster with regards to AA than the Radeon HD 3650 512MB, and also will be capable of handling higher resolutions without losing too much performance. (explain)

Radeon HD 7850		27520 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 24620 (849%)

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 data (in units of MB per second) that can be transported past the external memory interface within a second. It is 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 DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly record to the local memory in a second - measured in millions of pixels per second. The figure is worked out by multiplying the number of colour ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.