GeForce 9800 GT 1GB vs GeForce GT 240 GDDR5

Intro

Compare all of that to the GeForce GT 240 GDDR5, which has a clock frequency of 550 MHz and a GDDR5 memory speed of 850 MHz. It also makes use of a 128-bit memory bus, and makes use of a 40 nm design. It is made up of 96 SPUs, 32 Texture Address Units, and 8 ROPs.

Display Graphs

Hide Graphs

Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5		70 Watts
GeForce 9800 GT 1GB		105 Watts
	Difference: 35 Watts (50%)

Memory Bandwidth

The GeForce 9800 GT 1GB should theoretically be a little bit faster than the GeForce GT 240 GDDR5 overall. (explain)

GeForce 9800 GT 1GB		57600 MB/sec
GeForce GT 240 GDDR5		54400 MB/sec
	Difference: 3200 (6%)

Texel Rate

The GeForce 9800 GT 1GB will be much (more or less 91%) more effective at AF than the GeForce GT 240 GDDR5. (explain)

GeForce 9800 GT 1GB		33600 Mtexels/sec
GeForce GT 240 GDDR5		17600 Mtexels/sec
	Difference: 16000 (91%)

Pixel Rate

The GeForce 9800 GT 1GB is much (approximately 118%) better at FSAA than the GeForce GT 240 GDDR5, and also capable of handling higher resolutions better. (explain)

GeForce 9800 GT 1GB		9600 Mpixels/sec
GeForce GT 240 GDDR5		4400 Mpixels/sec
	Difference: 5200 (118%)

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 megabytes per second) that can be transferred over the external memory interface in a second. It is calculated by multiplying the card's interface width by its memory 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 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 number of texture map elements (texels) that can be processed in one second. This number is calculated by multiplying the total amount of texture units of the card by the core clock speed of the chip. The better the texel rate, 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 write to its local memory in one second - measured in millions of pixels per second. The number is calculated by multiplying the amount of colour ROPs by the the card's clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel fill rate is also dependant on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the max fill rate.