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

Intro

Compare all that to the Radeon HD 4850 2GB, which comes with GPU core speed of 625 MHz, and 2048 MB of GDDR4 memory running at 993 MHz through a 256-bit bus. It also features 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Both cards have the same power consumption.

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 Ti 2GB should be a lot faster than the Radeon HD 4850 2GB in general. (explain)

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

Texel Rate

The GeForce GTX 650 Ti 2GB is quite a bit (approximately 138%) faster with regards to anisotropic filtering than the Radeon HD 4850 2GB. (explain)

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

Pixel Rate

The GeForce GTX 650 Ti 2GB should be a lot (about 48%) more effective at full screen anti-aliasing than the Radeon HD 4850 2GB, and also should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTX 650 Ti 2GB		14848 Mpixels/sec
Radeon HD 4850 2GB		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 maximum amount of information (in units of MB per second) that can be moved over the external memory interface in one second. It is worked out by multiplying the card's bus width by its memory speed. If the card has DDR RAM, it should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The better the memory bandwidth, the better the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate also depends on lots of other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.