GeForce GTX 650 vs Radeon HD 3650 256MB

Intro

Compare all of that to the Radeon HD 3650 256MB, which uses a 55 nm design. AMD has clocked the core speed at 725 MHz. The DDR2 memory runs at a speed of 800 MHz on this specific card. It features 120(24x5) SPUs along with 8 TAUs and 4 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
Radeon HD 3650 256MB		78 Watts
	Difference: 14 Watts (22%)

Memory Bandwidth

Theoretically speaking, the GeForce GTX 650 should perform much faster than the Radeon HD 3650 256MB in general. (explain)

GeForce GTX 650		80000 MB/sec
Radeon HD 3650 256MB		25600 MB/sec
	Difference: 54400 (213%)

Texel Rate

The GeForce GTX 650 will be quite a bit (more or less 484%) faster with regards to texture filtering than the Radeon HD 3650 256MB. (explain)

GeForce GTX 650		33856 Mtexels/sec
Radeon HD 3650 256MB		5800 Mtexels/sec
	Difference: 28056 (484%)

Pixel Rate

The GeForce GTX 650 will be a lot (about 484%) faster with regards to anti-aliasing than the Radeon HD 3650 256MB, and will be capable of handling higher resolutions without losing too much performance. (explain)

GeForce GTX 650		16928 Mpixels/sec
Radeon HD 3650 256MB		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: Bandwidth is the maximum amount of data (counted in megabytes per second) that can be moved over the external memory interface within a second. The number is calculated by multiplying the interface width by its memory clock speed. In the case of DDR RAM, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the better the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be applied in one second. This figure is worked out by multiplying the total amount of texture units of the card 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 applied in a second.

Pixel Rate: Pixel rate is the maximum amount of pixels that the graphics chip could possibly write to its local memory in a second - measured in millions of pixels per second. The number is calculated by multiplying the number of ROPs by the the core clock speed. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, especially the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to reach the max fill rate.