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 frequency at 725 MHz. The GDDR3 RAM is set to run at a frequency of 800 MHz on this particular card. It features 120(24x5) SPUs along with 8 TAUs 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

Performance-wise, the GeForce GTX 650 should in theory be quite a bit superior to the Radeon HD 3650 512MB overall. (explain)

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

Texel Rate

The GeForce GTX 650 will be quite a bit (about 484%) better at texture filtering 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 running with a high screen resolution is important to you, then the GeForce GTX 650 is a better choice, by far. (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 max amount of information (in units of megabytes per second) that can be transferred across the external memory interface in a second. It is calculated by multiplying the card's bus width by its memory clock speed. In the case of DDR type RAM, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the better the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that can be applied in one second. This is calculated 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 applied in a second.

Pixel Rate: Pixel rate is the most pixels the video card can possibly write to the local memory per second - measured in millions of pixels per second. The number is calculated 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 rate is also dependant on lots of other factors, most notably the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.