GeForce GTX 650 Ti 2GB vs Radeon HD 3850 X2

Intro

Compare that to the Radeon HD 3850 X2, which makes use of a 55 nm design. AMD has clocked the core frequency at 668 MHz. The GDDR3 memory is set to run at a speed of 828 MHz on this specific card. It features 320(64x5) SPUs as well as 16 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Memory Bandwidth

Theoretically, the Radeon HD 3850 X2 should be quite a bit faster than the GeForce GTX 650 Ti 2GB in general. (explain)

Radeon HD 3850 X2		105984 MB/sec
GeForce GTX 650 Ti 2GB		86400 MB/sec
	Difference: 19584 (23%)

Texel Rate

The GeForce GTX 650 Ti 2GB should be a lot (approximately 178%) better at anisotropic filtering than the Radeon HD 3850 X2. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
Radeon HD 3850 X2		21376 Mtexels/sec
	Difference: 38016 (178%)

Pixel Rate

If running with a high resolution is important to you, then the Radeon HD 3850 X2 is superior to the GeForce GTX 650 Ti 2GB, by a large margin. (explain)

Radeon HD 3850 X2		21376 Mpixels/sec
GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
	Difference: 6528 (44%)

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.

One or more cards in this comparison are multi-core. This means that their bandwidth, texel and pixel rates are theoretically doubled - this does not mean the card will actually perform twice as fast, but only that it should in theory be able to. Actual game benchmarks will give a more accurate idea of what it's capable of.

Price Comparison

Specifications

Memory Bandwidth: Bandwidth is the largest amount of data (in units of megabytes per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory speed. If it uses DDR memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly write to the local memory in one second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the max fill rate.