GeForce 9800 GTX+ vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which comes with a core clock speed of 1058 MHz and a GDDR5 memory speed of 1250 MHz. It also features a 128-bit memory bus, and makes use of a 28 nm design. It is made up of 384 SPUs, 32 Texture Address Units, and 16 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 81 Watts (127%)

Memory Bandwidth

The GeForce GTX 650 should in theory be a bit faster than the GeForce 9800 GTX+ in general. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 9800 GTX+		70400 MB/sec
	Difference: 9600 (14%)

Texel Rate

The GeForce 9800 GTX+ is much (about 40%) better at texture filtering than the GeForce GTX 650. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce GTX 650		33856 Mtexels/sec
	Difference: 13376 (40%)

Pixel Rate

The GeForce GTX 650 should be quite a bit (approximately 43%) faster with regards to FSAA than the GeForce 9800 GTX+, and also capable of handling higher screen resolutions more effectively. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 5120 (43%)

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 (measured in MB per second) that can be moved over the external memory interface within a second. It is worked out by multiplying the bus width by the speed of its memory. If it uses DDR RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the better 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 number of texture map elements (texels) that are processed per second. This number is worked out by multiplying the total texture units by the core speed of the chip. The better the texel rate, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed per second.

Pixel Rate: Pixel rate is the most pixels that the graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the number of Render Output Units by the the core speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel output rate also depends on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the max fill rate.