GeForce GTX 465 vs Radeon HD 3650

Intro

Compare all that to the Radeon HD 3650, which comes with a clock frequency of 725 MHz and a GDDR4 memory frequency of 800 MHz. It also uses a 128-bit memory bus, and makes use of a 55 nm design. It features 120(24x5) SPUs, 8 Texture Address Units, and 4 Raster Operation Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon HD 3650		78 Watts
GeForce GTX 465		200 Watts
	Difference: 122 Watts (156%)

Memory Bandwidth

In theory, the GeForce GTX 465 is 301% faster than the Radeon HD 3650 in general, because of its higher data rate. (explain)

GeForce GTX 465		102592 MB/sec
Radeon HD 3650		25600 MB/sec
	Difference: 76992 (301%)

Texel Rate

The GeForce GTX 465 is a lot (approximately 360%) more effective at anisotropic filtering than the Radeon HD 3650. (explain)

GeForce GTX 465		26708 Mtexels/sec
Radeon HD 3650		5800 Mtexels/sec
	Difference: 20908 (360%)

Pixel Rate

The GeForce GTX 465 should be much (approximately 570%) faster with regards to AA than the Radeon HD 3650, and also will be able to handle higher screen resolutions more effectively. (explain)

GeForce GTX 465		19424 Mpixels/sec
Radeon HD 3650		2900 Mpixels/sec
	Difference: 16524 (570%)

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 (measured in MB per second) that can be transported past the external memory interface within a second. It is calculated by multiplying the card's interface width by its memory speed. In the case of DDR type memory, it must be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the amount of colour ROPs by the clock speed of the card. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.