GeForce 9800 GT 512MB vs GeForce 9800 GTX+

Intro

Compare all of that to the GeForce 9800 GTX+, which uses a 55 nm design. nVidia has set the core speed at 738 MHz. The GDDR3 memory works at a frequency of 1100 MHz on this card. It features 128 SPUs as well as 64 Texture Address Units and 16 Rasterization Operator Units.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce 9800 GT 512MB		105 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 40 Watts (38%)

Memory Bandwidth

The GeForce 9800 GTX+ should theoretically be a lot faster than the GeForce 9800 GT 512MB overall. (explain)

GeForce 9800 GTX+		70400 MB/sec
GeForce 9800 GT 512MB		57600 MB/sec
	Difference: 12800 (22%)

Texel Rate

The GeForce 9800 GTX+ will be quite a bit (more or less 41%) better at texture filtering than the GeForce 9800 GT 512MB. (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce 9800 GT 512MB		33600 Mtexels/sec
	Difference: 13632 (41%)

Pixel Rate

If running with a high screen resolution is important to you, then the GeForce 9800 GTX+ is a better choice, by far. (explain)

GeForce 9800 GTX+		11808 Mpixels/sec
GeForce 9800 GT 512MB		9600 Mpixels/sec
	Difference: 2208 (23%)

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 max amount of information (measured in megabytes per second) that can be transferred over the external memory interface in a second. It is worked out by multiplying the bus 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 AA, High Dynamic Range and high resolutions.

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

Pixel Rate: Pixel rate is the maximum number of pixels the video card can possibly write to its local memory per second - measured in millions of pixels per second. Pixel rate is calculated by multiplying the amount of Render Output Units 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 output rate is also dependant on quite a few other factors, especially the memory bandwidth - the lower the bandwidth is, the lower the ability to reach the maximum fill rate.