GeForce 9800 GT 1GB vs GeForce GTX 650

Intro

Compare all that to the GeForce GTX 650, which uses a 28 nm design. nVidia has set the core speed at 1058 MHz. The GDDR5 memory runs at a frequency of 1250 MHz on this card. It features 384 SPUs along with 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 GT 1GB		105 Watts
	Difference: 41 Watts (64%)

Memory Bandwidth

The GeForce GTX 650, in theory, should perform quite a bit faster than the GeForce 9800 GT 1GB in general. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 9800 GT 1GB		57600 MB/sec
	Difference: 22400 (39%)

Texel Rate

The GeForce GTX 650 is a bit (about 1%) more effective at anisotropic filtering than the GeForce 9800 GT 1GB. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce 9800 GT 1GB		33600 Mtexels/sec
	Difference: 256 (1%)

Pixel Rate

If running with lots of anti-aliasing is important to you, then the GeForce GTX 650 is the winner, by a large margin. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 9800 GT 1GB		9600 Mpixels/sec
	Difference: 7328 (76%)

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 information (counted in MB per second) that can be moved across the external memory interface in a second. The number is calculated by multiplying the interface width by its memory speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster 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 per second. This is worked out by multiplying the total amount of texture units by the core clock speed of the chip. The higher this number, the better the video 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 graphics card could possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the number of Raster Operations Pipelines by the clock speed of the card. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.