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

Intro

Compare those specifications to the Radeon HD 3690/3830, which uses a 55 nm design. AMD has set the core speed at 668 MHz. The GDDR3 RAM works at a speed of 828 MHz on this specific model. It features 320(64x5) SPUs as well as 16 TAUs and 16 ROPs.

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) will be 262% quicker than the Radeon HD 3690/3830 overall, because of its higher bandwidth. (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) will be much (more or less 77%) better at texture 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 a better choice, by far. (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: Bandwidth is the maximum amount of data (measured in MB per second) that can be transported past the external memory interface in one second. It's calculated by multiplying the interface width by its memory speed. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 texture map elements (texels) that can be processed per second. This is worked out by multiplying the total 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 a second.

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card could possibly write to the local memory per second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the number of ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the ability to get to the max fill rate.