GeForce 9800 GT 512MB vs GeForce GTX 650

Intro

Compare that to the GeForce GTX 650, which uses a 28 nm design. nVidia has clocked the core frequency at 1058 MHz. The GDDR5 RAM is set to run at a speed of 1250 MHz on this particular card. It features 384 SPUs along with 32 TAUs and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GTX 650		64 Watts
GeForce 9800 GT 512MB		105 Watts
	Difference: 41 Watts (64%)

Memory Bandwidth

In theory, the GeForce GTX 650 should be a lot faster than the GeForce 9800 GT 512MB overall. (explain)

GeForce GTX 650		80000 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 22400 (39%)

Texel Rate

The GeForce GTX 650 will be a small bit (about 1%) more effective at anisotropic filtering than the GeForce 9800 GT 512MB. (explain)

GeForce GTX 650		33856 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 256 (1%)

Pixel Rate

If running with a high resolution is important to you, then the GeForce GTX 650 is a better choice, by far. (explain)

GeForce GTX 650		16928 Mpixels/sec
GeForce 9800 GT 512MB		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: Memory bandwidth is the largest amount of data (measured in MB per second) that can be transported across the external memory interface in a second. It's calculated by multiplying the card's interface width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The better the card's memory bandwidth, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total texture units by the core speed of the chip. The higher this number, the better the graphics card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied per second.

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