GeForce 9800 GTX+ vs GeForce GT 450 (OEM)

Intro

Compare all that to the GeForce GT 450 (OEM), which makes use of a 40 nm design. nVidia has set the core frequency at 790 MHz. The GDDR5 memory works at a speed of 1000 MHz on this card. It features 144 SPUs as well as 24 TAUs and 24 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 450 (OEM)		106 Watts
GeForce 9800 GTX+		145 Watts
	Difference: 39 Watts (37%)

Memory Bandwidth

In theory, the GeForce GT 450 (OEM) should be a lot faster than the GeForce 9800 GTX+ overall. (explain)

GeForce GT 450 (OEM)		96000 MB/sec
GeForce 9800 GTX+		70400 MB/sec
	Difference: 25600 (36%)

Texel Rate

The GeForce 9800 GTX+ should be a lot (about 149%) faster with regards to texture filtering than the GeForce GT 450 (OEM). (explain)

GeForce 9800 GTX+		47232 Mtexels/sec
GeForce GT 450 (OEM)		18960 Mtexels/sec
	Difference: 28272 (149%)

Pixel Rate

The GeForce GT 450 (OEM) is quite a bit (about 61%) better at FSAA than the GeForce 9800 GTX+, and should be able to handle higher resolutions better. (explain)

GeForce GT 450 (OEM)		18960 Mpixels/sec
GeForce 9800 GTX+		11808 Mpixels/sec
	Difference: 7152 (61%)

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 data (in units of megabytes per second) that can be transported over the external memory interface within a second. It is worked out by multiplying the card's bus width by its memory clock speed. If the card has DDR memory, the result should be multiplied by 2 again. If DDR5, multiply by ANOTHER 2x. The higher the memory bandwidth, the faster 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 texture map elements (texels) that are processed in one second. This number is calculated by multiplying the total texture units of the card by the core clock speed of the chip. The better this number, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in one second.

Pixel Rate: Pixel rate is the most pixels that the graphics chip could possibly write to its local memory per second - measured in millions of pixels per second. The figure is calculated by multiplying the number of ROPs by the the core speed of the card. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the maximum fill rate.