GeForce GT 450 (OEM) vs Radeon HD 3690/3830

Intro

Compare all of that to the Radeon HD 3690/3830, which has core speeds of 668 MHz on the GPU, and 828 MHz on the 256 MB of GDDR3 RAM. It features 320(64x5) SPUs along with 16 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3690/3830		75 Watts
GeForce GT 450 (OEM)		106 Watts
	Difference: 31 Watts (41%)

Memory Bandwidth

Theoretically speaking, the GeForce GT 450 (OEM) should perform much faster than the Radeon HD 3690/3830 overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
Radeon HD 3690/3830		26496 MB/sec
	Difference: 69504 (262%)

Texel Rate

The GeForce GT 450 (OEM) is quite a bit (approximately 77%) faster with regards to anisotropic filtering than the Radeon HD 3690/3830. (explain)

GeForce GT 450 (OEM)		18960 Mtexels/sec
Radeon HD 3690/3830		10688 Mtexels/sec
	Difference: 8272 (77%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce GT 450 (OEM) is superior to the Radeon HD 3690/3830, and very much so. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
Radeon HD 3690/3830		10688 Mpixels/sec
	Difference: 8272 (77%)

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 largest amount of data (measured in megabytes per second) that can be transferred across the external memory interface in one second. It is worked out by multiplying the bus width by its memory speed. If the card has DDR type memory, the result should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied per second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The higher the texel rate, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record 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 - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on many other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.