GeForce GTX 650 vs Radeon HD 3690/3830

Intro

Compare that to the Radeon HD 3690/3830, which features core speeds of 668 MHz on the GPU, and 828 MHz on the 256 MB of GDDR3 RAM. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 3690/3830		75 Watts
	Difference: 11 Watts (17%)

Memory Bandwidth

The GeForce GTX 650 should in theory perform a lot faster than the Radeon HD 3690/3830 overall. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 53504 (202%)

Texel Rate

The GeForce GTX 650 is much (more or less 217%) faster with regards to anisotropic filtering than the Radeon HD 3690/3830. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 23168 (217%)

Pixel Rate

If using a high resolution is important to you, then the GeForce GTX 650 is a better choice, and very much so. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 6240 (58%)

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: Bandwidth is the max amount of data (measured in MB per second) that can be moved over the external memory interface in one second. It's calculated by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, it 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, HDR and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core clock speed of the chip. The higher this number, the better the 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 maximum number of pixels the graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the card's 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 bandwidth is, the lower the ability to get to the maximum fill rate.