GeForce GTS 250 1GB vs Radeon R7 240

Intro

Compare all that to the Radeon R7 240, which makes use of a 28 nm design. AMD has clocked the core frequency at 730 MHz. The DDR3 RAM is set to run at a frequency of 900 MHz on this model. It features 320 SPUs along with 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 250 1GB		145 Watts
	Difference: 115 Watts (383%)

Memory Bandwidth

Theoretically, the GeForce GTS 250 1GB should be quite a bit faster than the Radeon R7 240 overall. (explain)

GeForce GTS 250 1GB		70400 MB/sec
Radeon R7 240		28800 MB/sec
	Difference: 41600 (144%)

Texel Rate

The GeForce GTS 250 1GB will be quite a bit (more or less 224%) better at anisotropic filtering than the Radeon R7 240. (explain)

GeForce GTS 250 1GB		47232 Mtexels/sec
Radeon R7 240		14600 Mtexels/sec
	Difference: 32632 (224%)

Pixel Rate

The GeForce GTS 250 1GB will be a lot (about 102%) faster with regards to full screen anti-aliasing than the Radeon R7 240, and also able to handle higher screen resolutions while still performing well. (explain)

GeForce GTS 250 1GB		11808 Mpixels/sec
Radeon R7 240		5840 Mpixels/sec
	Difference: 5968 (102%)

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 information (counted in megabytes per second) that can be transferred past the external memory interface within a second. The number is calculated by multiplying the card's interface width by its memory speed. In the case of DDR RAM, the result should be multiplied by 2 once again. If DDR5, multiply by ANOTHER 2x. The better the bandwidth is, the faster the card will be in general. It especially helps with AA, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be applied in one second. This is worked out 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 per second.

Pixel Rate: Pixel rate is the maximum number of pixels the video card could possibly record to its local memory per second - measured in millions of pixels per second. The number is worked out by multiplying the number of ROPs by the the core 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 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 get to the maximum fill rate.