GeForce GT 450 (OEM) vs Radeon HD 4850 2GB

Intro

Compare those specs to the Radeon HD 4850 2GB, which features GPU clock speed of 625 MHz, and 2048 MB of GDDR4 RAM running at 993 MHz through a 256-bit bus. It also is comprised of 800(160x5) SPUs, 40 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
Radeon HD 4850 2GB		110 Watts
	Difference: 4 Watts (4%)

Memory Bandwidth

As far as performance goes, the GeForce GT 450 (OEM) should in theory be quite a bit better than the Radeon HD 4850 2GB overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 4850 2GB		63552 MB/sec
	Difference: 32448 (51%)

Texel Rate

The Radeon HD 4850 2GB is much (more or less 32%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)

Radeon HD 4850 2GB		25000 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 6040 (32%)

Pixel Rate

The GeForce GT 450 (OEM) is a lot (approximately 90%) better at AA than the Radeon HD 4850 2GB, and able to handle higher resolutions while still performing well. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 4850 2GB		10000 Mpixels/sec
	Difference: 8960 (90%)

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 (counted in megabytes per second) that can be moved over the external memory interface in one second. The number is worked out by multiplying the interface width by the speed of its memory. If it uses DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly record to its local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of Render Output Units by the the card's 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 many other factors, especially the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to get to the max fill rate.