GeForce GTX 560 Ti 448 vs Radeon HD 4850 2GB

Intro

Compare those specs to the Radeon HD 4850 2GB, which features a core clock frequency of 625 MHz and a GDDR4 memory speed of 993 MHz. It also uses a 256-bit memory bus, and makes use of a 55 nm design. It is made up of 800(160x5) SPUs, 40 Texture Address Units, and 16 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 2GB		110 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 100 Watts (91%)

Memory Bandwidth

Performance-wise, the GeForce GTX 560 Ti 448 should in theory be quite a bit better than the Radeon HD 4850 2GB in general. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 80448 (127%)

Texel Rate

The GeForce GTX 560 Ti 448 should be quite a bit (about 64%) more effective at anisotropic filtering than the Radeon HD 4850 2GB. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
Radeon HD 4850 2GB		25000 Mtexels/sec
	Difference: 15992 (64%)

Pixel Rate

If using high levels of AA is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon HD 4850 2GB, by a large margin. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 19280 (193%)

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: Memory bandwidth is the max amount of information (in units of MB per second) that can be moved past the external memory interface within a second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, it must be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the graphics card can possibly write to the local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate also depends on many other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the potential to get to the maximum fill rate.