GeForce GTX 650 vs Radeon HD 3650 512MB

Intro

Compare those specifications to the Radeon HD 3650 512MB, which makes use of a 55 nm design. AMD has clocked the core speed at 725 MHz. The GDDR3 RAM runs at a speed of 800 MHz on this specific card. It features 120(24x5) SPUs along with 8 Texture Address Units and 4 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 3650 512MB		78 Watts
	Difference: 14 Watts (22%)

Memory Bandwidth

In theory, the GeForce GTX 650 should be 213% faster than the Radeon HD 3650 512MB overall, due to its greater bandwidth. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 3650 512MB		25600 MB/sec
	Difference: 54400 (213%)

Texel Rate

The GeForce GTX 650 should be quite a bit (about 484%) faster with regards to AF than the Radeon HD 3650 512MB. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 3650 512MB		5800 Mtexels/sec
	Difference: 28056 (484%)

Pixel Rate

If using lots of anti-aliasing is important to you, then the GeForce GTX 650 is a better choice, and very much so. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 3650 512MB		2900 Mpixels/sec
	Difference: 14028 (484%)

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 maximum amount of information (in units of MB per second) that can be transferred over the external memory interface within a second. It's calculated by multiplying the interface width by its memory speed. In the case of DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and high resolutions.

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

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to its local memory in a 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 - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.