GeForce GTX 465 vs Radeon HD 4850 1GB

Intro

Compare those specs to the Radeon HD 4850 1GB, which makes use of a 55 nm design. AMD has set the core speed at 625 MHz. The GDDR4 memory is set to run at a frequency of 993 MHz on this specific card. It features 800(160x5) SPUs along with 40 Texture Address Units and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 4850 1GB		110 Watts
GeForce GTX 465		200 Watts
	Difference: 90 Watts (82%)

Memory Bandwidth

The GeForce GTX 465, in theory, should perform a lot faster than the Radeon HD 4850 1GB in general. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 4850 1GB		63552 MB/sec
	Difference: 39040 (61%)

Texel Rate

The GeForce GTX 465 is a small bit (about 7%) more effective at anisotropic filtering than the Radeon HD 4850 1GB. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 4850 1GB		25000 Mtexels/sec
	Difference: 1708 (7%)

Pixel Rate

The GeForce GTX 465 will be a lot (about 94%) faster with regards to full screen anti-aliasing than the Radeon HD 4850 1GB, and also able to handle higher screen resolutions better. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 4850 1GB		10000 Mpixels/sec
	Difference: 9424 (94%)

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 (in units of MB per second) that can be moved across the external memory interface in a second. It's calculated by multiplying the interface width by its memory speed. If it uses DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better the bandwidth is, 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 texture map elements (texels) that are applied per second. This figure is calculated 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 in one second.

Pixel Rate: Pixel rate is the maximum number of pixels that the graphics card can possibly write to its local memory per 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 outputting the pixels (image) to the screen. The actual pixel rate also depends on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.