GeForce GTX 650 Ti 2GB vs Radeon HD 4850 1GB

Intro

Compare all that to the Radeon HD 4850 1GB, which uses a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR4 memory runs at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs as well as 40 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Performance-wise, the GeForce GTX 650 Ti 2GB should in theory be a lot better than the Radeon HD 4850 1GB in general. (explain)

GeForce GTX 650 Ti 2GB		86400 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 22848 (36%)

Texel Rate

The GeForce GTX 650 Ti 2GB should be a lot (about 138%) faster with regards to texture filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 650 Ti 2GB		59392 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 34392 (138%)

Pixel Rate

The GeForce GTX 650 Ti 2GB is quite a bit (more or less 48%) better at anti-aliasing than the Radeon HD 4850 1GB, and also will be capable of handling higher screen resolutions better. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 4848 (48%)

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 information (in units of MB per second) that can be transported across the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must 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 anti-aliasing, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory in one second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount 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 rate is also dependant on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.