GeForce GTX 650 Ti vs Radeon HD 3870 1GB

Intro

Compare all of that to the Radeon HD 3870 1GB, which comes with a clock frequency of 775 MHz and a GDDR4 memory frequency of 1125 MHz. It also features a 256-bit bus, and makes use of a 55 nm design. It is made up of 320(64x5) SPUs, 16 TAUs, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3870 1GB		106 Watts
GeForce GTX 650 Ti		110 Watts
	Difference: 4 Watts (4%)

Memory Bandwidth

As far as performance goes, the GeForce GTX 650 Ti should in theory be a small bit superior to the Radeon HD 3870 1GB overall. (explain)

GeForce GTX 650 Ti		86400 MB/sec
Radeon HD 3870 1GB		72000 MB/sec
	Difference: 14400 (20%)

Texel Rate

The GeForce GTX 650 Ti is much (approximately 379%) faster with regards to AF than the Radeon HD 3870 1GB. (explain)

GeForce GTX 650 Ti		59392 Mtexels/sec
Radeon HD 3870 1GB		12400 Mtexels/sec
	Difference: 46992 (379%)

Pixel Rate

The GeForce GTX 650 Ti is a small bit (about 20%) faster with regards to FSAA than the Radeon HD 3870 1GB, and also will be capable of handling higher resolutions better. (explain)

GeForce GTX 650 Ti		14848 Mpixels/sec
Radeon HD 3870 1GB		12400 Mpixels/sec
	Difference: 2448 (20%)

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 largest amount of data (counted in megabytes per second) that can be transported across the external memory interface in a second. The number is calculated by multiplying the bus width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be processed per second. This number is calculated by multiplying the total texture units by the core 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 in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the potential to get to the max fill rate.