GeForce GT 240 GDDR5 1GB vs Radeon HD 7790

Intro

Compare those specs to the Radeon HD 7790, which comes with a core clock frequency of 1000 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 128-bit bus, and makes use of a 28 nm design. It features 896 SPUs, 56 TAUs, and 16 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

GeForce GT 240 GDDR5 1GB		70 Watts
Radeon HD 7790		85 Watts
	Difference: 15 Watts (21%)

Memory Bandwidth

As far as performance goes, the Radeon HD 7790 should theoretically be a lot superior to the GeForce GT 240 GDDR5 1GB in general. (explain)

Radeon HD 7790		96000 MB/sec
GeForce GT 240 GDDR5 1GB		54400 MB/sec
	Difference: 41600 (76%)

Texel Rate

The Radeon HD 7790 should be a lot (more or less 218%) more effective at AF than the GeForce GT 240 GDDR5 1GB. (explain)

Radeon HD 7790		56000 Mtexels/sec
GeForce GT 240 GDDR5 1GB		17600 Mtexels/sec
	Difference: 38400 (218%)

Pixel Rate

If running with high levels of AA is important to you, then the Radeon HD 7790 is a better choice, and very much so. (explain)

Radeon HD 7790		16000 Mpixels/sec
GeForce GT 240 GDDR5 1GB		4400 Mpixels/sec
	Difference: 11600 (264%)

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 one second. It is worked out by multiplying the card's interface width by the speed of its memory. If the card has DDR type RAM, the result should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the card's memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and higher screen resolutions.

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

Pixel Rate: Pixel rate is the maximum amount of pixels the graphics card can possibly write to its local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the clock speed of the card. ROPs (Raster Operations Pipelines - also sometimes called Render Output Units) are responsible for drawing the pixels (image) on the screen. The actual pixel fill rate also depends on many other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the ability to reach the max fill rate.