GeForce 9800 GT 1GB vs GeForce GTX 650

Intro

Compare those specifications to the GeForce GTX 650, which makes use of a 28 nm design. nVidia has set the core frequency at 1058 MHz. The GDDR5 memory is set to run at a speed of 1250 MHz on this specific model. It features 384 SPUs as well as 32 TAUs 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 should theoretically perform quite a bit faster than the GeForce 9800 GT 1GB overall. (explain)

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

Texel Rate

The GeForce GTX 650 should be a little bit (approximately 1%) better 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 using a high resolution is important to you, then the GeForce GTX 650 is superior to the GeForce 9800 GT 1GB, by far. (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 data (measured in MB per second) that can be transferred across the external memory interface within a second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR memory, the result should be multiplied by 2 again. If it uses DDR5, multiply by ANOTHER 2x. 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 texture map elements (texels) that can be processed per second. This number is worked out by multiplying the total number of texture units by the core clock speed of the chip. The higher the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels in a second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to the local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of Render Output Units by the the card's clock speed. ROPs (Raster Operations Pipelines - aka Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.