GeForce GT 640 DDR3 vs Radeon R5 M330

Intro

Compare all that to the Radeon R5 M330, which comes with a clock speed of 1030 MHz and a DDR3 memory frequency of 900 MHz. It also features a 64-bit bus, and makes use of a 28 nm design. It is made up of 320 SPUs, 20 TAUs, and 8 ROPs.

Display Graphs

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Power Usage and Theoretical Benchmarks

Memory Bandwidth

As far as performance goes, the GeForce GT 640 DDR3 should theoretically be much better than the Radeon R5 M330 in general. (explain)

GeForce GT 640 DDR3		57024 MB/sec
Radeon R5 M330		14400 MB/sec
	Difference: 42624 (296%)

Texel Rate

The GeForce GT 640 DDR3 will be much (about 40%) better at texture filtering than the Radeon R5 M330. (explain)

GeForce GT 640 DDR3		28800 Mtexels/sec
Radeon R5 M330		20600 Mtexels/sec
	Difference: 8200 (40%)

Pixel Rate

The GeForce GT 640 DDR3 is much (more or less 75%) faster with regards to full screen anti-aliasing than the Radeon R5 M330, and also will be capable of handling higher resolutions without slowing down too much. (explain)

GeForce GT 640 DDR3		14400 Mpixels/sec
Radeon R5 M330		8240 Mpixels/sec
	Difference: 6160 (75%)

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 largest amount of information (counted in MB per second) that can be moved across the external memory interface within a second. It's worked out by multiplying the bus width by its memory clock speed. In the case of DDR type memory, it must be multiplied by 2 again. If it uses DDR5, multiply by 4 instead. The higher the memory bandwidth, the faster the card will be in general. It especially helps with AA, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum texture map elements (texels) that can be processed per second. This figure is worked out by multiplying the total texture units of the card by the core speed of the chip. The higher 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 maximum amount of pixels that the graphics chip can possibly write to the local memory per second - measured in millions of pixels per second. The figure is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - also called Render Output Units) are responsible for outputting the pixels (image) to the screen. The actual pixel fill rate is also dependant on many other factors, most notably the memory bandwidth of the card - the lower the bandwidth is, the lower the ability to get to the maximum fill rate.