GeForce GTX 970 vs Radeon HD 3650

Intro

Compare that to the Radeon HD 3650, which comes with clock speeds of 725 MHz on the GPU, and 800 MHz on the 1024 MB of GDDR4 memory. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
GeForce GTX 970		145 Watts
	Difference: 67 Watts (86%)

Memory Bandwidth

In theory, the GeForce GTX 970 should be 775% faster than the Radeon HD 3650 overall, because of its higher data rate. (explain)

GeForce GTX 970		224000 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 198400 (775%)

Texel Rate

The GeForce GTX 970 should be much (about 1783%) more effective at anisotropic filtering than the Radeon HD 3650. (explain)

GeForce GTX 970		109200 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 103400 (1783%)

Pixel Rate

The GeForce GTX 970 should be much (about 2217%) more effective at full screen anti-aliasing than the Radeon HD 3650, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 970		67200 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 64300 (2217%)

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 data (counted in megabytes per second) that can be transferred over the external memory interface within a second. It is worked out by multiplying the card's interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster 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 amount of texture map elements (texels) that can be applied per second. This number is worked out by multiplying the total amount of texture units by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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