GeForce 9500 GT 1GB GDDR3 vs Radeon R5 M255

Intro

Compare all that to the Radeon R5 M255, which features a core clock frequency of 940 MHz and a DDR3 memory frequency of 1000 MHz. It also features a 64-bit memory bus, and uses a 28 nm design. It features 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

The GeForce 9500 GT 1GB GDDR3 should theoretically be a lot faster than the Radeon R5 M255 overall. (explain)

GeForce 9500 GT 1GB GDDR3		25600 MB/sec
Radeon R5 M255		16000 MB/sec
	Difference: 9600 (60%)

Texel Rate

The Radeon R5 M255 should be much (about 114%) more effective at texture filtering than the GeForce 9500 GT 1GB GDDR3. (explain)

Radeon R5 M255		18800 Mtexels/sec
GeForce 9500 GT 1GB GDDR3		8800 Mtexels/sec
	Difference: 10000 (114%)

Pixel Rate

If running with a high screen resolution is important to you, then the Radeon R5 M255 is a better choice, by a large margin. (explain)

Radeon R5 M255		7520 Mpixels/sec
GeForce 9500 GT 1GB GDDR3		4400 Mpixels/sec
	Difference: 3120 (71%)

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: Bandwidth is the maximum amount of information (in units of MB per second) that can be moved across the external memory interface in one second. The number is worked out by multiplying the card's bus width by its memory clock speed. In the case of DDR type memory, it should be multiplied by 2 once again. If DDR5, multiply by 4 instead. The higher the bandwidth is, the faster the card will be in general. It especially helps with anti-aliasing, HDR and higher screen resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed in one second. This figure is calculated by multiplying the total texture units of the card by the core speed of the chip. The better the texel rate, the better the 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 graphics card can possibly write to its local memory in one second - measured in millions of pixels per second. The figure is calculated by multiplying the number of colour ROPs by the the core 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 output rate is also dependant on quite a few other factors, most notably the memory bandwidth of the card - the lower the memory bandwidth is, the lower the potential to reach the maximum fill rate.