GeForce GTX 560 Ti 448 vs Radeon HD 4850 512MB

Intro

Compare all that to the Radeon HD 4850 512MB, which makes use of a 55 nm design. AMD has clocked the core speed at 625 MHz. The GDDR3 memory is set to run at a speed of 993 MHz on this model. It features 800(160x5) SPUs along with 40 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 512MB		110 Watts
GeForce GTX 560 Ti 448		210 Watts
	Difference: 100 Watts (91%)

Memory Bandwidth

Performance-wise, the GeForce GTX 560 Ti 448 should theoretically be much superior to the Radeon HD 4850 512MB in general. (explain)

GeForce GTX 560 Ti 448		144000 MB/sec
Radeon HD 4850 512MB		63552 MB/sec
	Difference: 80448 (127%)

Texel Rate

The GeForce GTX 560 Ti 448 will be a lot (approximately 64%) more effective at texture filtering than the Radeon HD 4850 512MB. (explain)

GeForce GTX 560 Ti 448		40992 Mtexels/sec
Radeon HD 4850 512MB		25000 Mtexels/sec
	Difference: 15992 (64%)

Pixel Rate

If using a high screen resolution is important to you, then the GeForce GTX 560 Ti 448 is superior to the Radeon HD 4850 512MB, and very much so. (explain)

GeForce GTX 560 Ti 448		29280 Mpixels/sec
Radeon HD 4850 512MB		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 maximum amount of information (in units of megabytes per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the bus width by the speed of its memory. If it uses DDR RAM, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the 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 can be processed in one second. This is calculated by multiplying the total number of texture units by the core speed of the chip. The higher the texel rate, the better the video card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in one second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip can possibly record 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 the core clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to get to the maximum fill rate.