GeForce GTS 150 vs Radeon R7 240

Intro

Compare those specifications to the Radeon R7 240, which has GPU clock speed of 730 MHz, and 2048 MB of DDR3 memory set to run at 900 MHz through a 128-bit bus. It also is comprised of 320 Stream Processors, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon R7 240		30 Watts
GeForce GTS 150		141 Watts
	Difference: 111 Watts (370%)

Memory Bandwidth

Theoretically speaking, the GeForce GTS 150 is 11% faster than the Radeon R7 240 in general, due to its greater data rate. (explain)

GeForce GTS 150		32000 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 3200 (11%)

Texel Rate

The GeForce GTS 150 is a lot (approximately 224%) faster with regards to texture filtering than the Radeon R7 240. (explain)

GeForce GTS 150		47360 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 32760 (224%)

Pixel Rate

The GeForce GTS 150 should be much (more or less 103%) better at anti-aliasing than the Radeon R7 240, and should be able to handle higher screen resolutions without losing too much performance. (explain)

GeForce GTS 150		11840 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 6000 (103%)

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 MB 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. In the case of DDR RAM, it should be multiplied by 2 once again. If it uses DDR5, multiply by 4 instead. The better 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 are applied in one second. This number is calculated by multiplying the total amount of texture units of the card by the core speed of the chip. The better this number, the better the card will be at texture filtering (anisotropic filtering - AF). It is measured in millions of texels applied in a second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. Pixel rate is worked out by multiplying the amount of ROPs by the the core 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 fill rate also depends on lots of other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the potential to reach the maximum fill rate.