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Gaming Performance Comparison
In terms of overall gaming performance, the graphical capabilities of the Intel Iris Pro Graphics 5200 Mobile are noticeably better than the Nvidia GeForce GT 640M.
The GeForce GT 640M has a 225 MHz higher core clock speed and 24 more Texture Mapping Units than the Pro Graphics. This results in the GeForce GT 640M providing 16.8 GTexel/s better texturing performance. This still holds weight but shader performance is generally more relevant, particularly since both of these GPUs support at least DirectX 10.
The GeForce GT 640M has a 225 MHz higher core clock speed and 12 more Render Output Units than the Pro Graphics. This results in the GeForce GT 640M providing 8.4 GPixel/s better pixeling performance. However, both GPUs support DirectX 9 or above, and pixeling performance is only really relevant when comparing older cards.
The Pro Graphics was released over a year more recently than the GeForce GT 640M, and so the Pro Graphics is likely to have better driver support, meaning it will be more optimized for running the latest games.
The GeForce GT 640M has 2048 MB video memory, but the Pro Graphics does not have an entry, so the two GPUs cannot be reliably compared in this area.
The Iris Pro Graphics 5200 Mobile has 160 Shader Processing Units and the GeForce GT 640M has 384. However, the actual shader performance of the Pro Graphics is 784. The Pro Graphics having 400 better shader performance is not particularly notable, as altogether the GeForce GT 640M performs better when taking into account other relevant data.
The Pro Graphics transistor size technology is 6 nm (nanometers) smaller than the GeForce GT 640M. This means that the Pro Graphics is expected to run very slightly cooler and achieve higher clock frequencies than the GeForce GT 640M.
The Iris Pro Graphics 5200 Mobile requires 28 Watts to run and the GeForce GT 640M requires 32 Watts. The GeForce GT 640M requires 4 Watts more than the Pro Graphics to run. The difference is not significant enough for the GeForce GT 640M to have a noticeably larger impact on your yearly electricity bills than the Pro Graphics.
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|Max Power||28 Watts||vs||32 Watts|
|Recommended RAM||-||6 GB|
|Recommended Screen Size||1366x768||1366x768|
|Mini Review||Iris Pro Graphics 5200 Mobile are found in some of the 2013 Haswell mobile processors. |
They feature 40 Execution Units (160 Shader Processing Units), 8 TMUs and 4 ROPs. They share system memory and so the memory channel and speed will depend on the users configuration. The best possible combination is a dual-channel bus-width with an operating memory clock of 800MHz.
Its central unit and turbo frequency also depend on the CPU its embedded but it ranges from 400MHz to 1300MHz.
Compared to Iris Graphics 5100 Mobile, they offer an additional eDRAM cache of 128MB and so might offer performance identical to a dedicated GeForce GT 640M or a Radeon HD 7730M.
|GeForce GT 640M is a middle-class mobile GPU based on the 28nm Kepler GK107 Core. |
It offers 384 Shader Processing Units, 32 TMUs and 16 ROPs on a 128-bit memory interface of 2GB DDR3 (though GDDR5 is also supported but it most likely won't be used due to the increased cost and small performance boost). The central clock runs at 625MHz (709MHz in Turbo Mode) and the memory clock operates at 900MHz. Expect a power consumption of up to 32 Watt.
Benchmarks indicate its performance is quite average and that some modern demanding games are playable at high settings using a 720p resolution though small tweaks will be required to achieve more fluent (30+) FPS.