GeForce GTX 750 Ti vs Radeon HD 3690/3830

Intro

Compare all that to the Radeon HD 3690/3830, which features GPU core speed of 668 MHz, and 256 MB of GDDR3 memory set to run at 828 MHz through a 128-bit bus. It also features 320(64x5) Stream Processors, 16 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 750 Ti		60 Watts
Radeon HD 3690/3830		75 Watts
	Difference: 15 Watts (25%)

Memory Bandwidth

Theoretically, the GeForce GTX 750 Ti should perform much faster than the Radeon HD 3690/3830 in general. (explain)

GeForce GTX 750 Ti		86400 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 59904 (226%)

Texel Rate

The GeForce GTX 750 Ti is a lot (more or less 282%) more effective at AF than the Radeon HD 3690/3830. (explain)

GeForce GTX 750 Ti		40800 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 30112 (282%)

Pixel Rate

The GeForce GTX 750 Ti is much (approximately 53%) better at full screen anti-aliasing than the Radeon HD 3690/3830, and also will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 750 Ti		16320 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 5632 (53%)

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 information (in units of MB per second) that can be transferred across the external memory interface in one second. It's calculated by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated 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 filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.