GeForce GTS 150 vs Radeon HD 3650 512MB

Intro

Compare all that to the Radeon HD 3650 512MB, which has GPU core speed of 725 MHz, and 512 MB of GDDR3 memory set to run at 800 MHz through a 128-bit bus. It also is comprised of 120(24x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650 512MB		78 Watts
GeForce GTS 150		141 Watts
	Difference: 63 Watts (81%)

Memory Bandwidth

In theory, the GeForce GTS 150 should perform much faster than the Radeon HD 3650 512MB in general. (explain)

GeForce GTS 150		32000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 6400 (25%)

Texel Rate

The GeForce GTS 150 is quite a bit (approximately 717%) faster with regards to texture filtering than the Radeon HD 3650 512MB. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 41560 (717%)

Pixel Rate

The GeForce GTS 150 should be a lot (about 308%) better at full screen anti-aliasing than the Radeon HD 3650 512MB, and will be able to handle higher screen resolutions better. (explain)

GeForce GTS 150		11840 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 8940 (308%)

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 max amount of data (counted in megabytes per second) that can be transported over the external memory interface within a second. The number is worked out by multiplying the bus width by its memory clock speed. If the card has DDR memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that are processed per second. This number is calculated by multiplying the total amount of texture units by the core clock 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 in a second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel rate is also dependant on many other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.