That’s what it seems according to the data that Nvidia has shown, which is even stranger if possible, since they are not too clear in this regard. Of the two models presented officially, the fastest is undoubtedly the MX250, where Nvidia figures as a 3.5X faster than other integrated graphics cards for photo and video editing.
This is specified by what Nvidia calls GPU Engine Specs, where it gives a GeForce Performance Score, in which curiously it is encrypted the " up to 3.5X " and an apostrophe in which you can read that is based on the score obtained in games against the Intel UHD620.
MX250 would perform worse than the MX150 it replaces, where both share memory, DX12 support and architecture. And MX250 will be offered with two different TDP: 25 watts and 10 watts, which is another feature shared by both cards.
If true they are the same chip, but with lower performance, this may be due to the difference in frequencies, where it is possible that to better preserve the batteries, this new MX250 yields something less than its predecessor.
After the launch of the MX150 back in May 2017, a little later than the year since its launch, a performance drop was noticed depending on the variant of MX150 that included the laptop in question.
And is that two different variants were defined without notice by Nvidia, the now known with 10 watts of TDP and the normal version with 25 watts, where it had to resort to technical specifications to appreciate such changes.
The story can be repeated, where this MX250 could be, as shown on the Nvidia website, a highlighted card that will set different frequencies in post of some improvement for another component, be it in temperature, battery life or simply a lower cost for the manufacturer that implements it.
This move may be because Nvidia does not consider direct competition from AMD with its 3000 series APUs, since these cards are direct competition, while AMDs are a substantial improvement over Intel’s iGPU.
This could also explain the lower performance for the sake of consumption, since it is the weak point of Nvidia currently in this series, especially in its GPU of 25 watts.