Only the 1TB and 2TB iPad Pros come with the full M4 core count and 16GB of memory.

Apple’s Let Loose event saw rumors of an M4-powered OLED iPad Pro confirmed. Much of the presentation was dedicated to talking about the new chip and its “up to” ten CPU cores, made up of four high-performance cores and six efficiency cores.

Apple used the words “up to” for a reason. The iPad Pro’s spec page reveals only the 1TB and 2TB models have all four high-performance CPU cores. The 256GB and 512GB iPad Pros use a version of the M4 with three of these cores enabled.

Buyers of the more expensive iPad Pro get more than just an extra high-performance core: 16GB of RAM for the 1TB and 2TB tablets, and 8GB for the 256GB and 512GB models.

Offering different memory capacities based on the iPad’s storage capacity is something Apple has done in the past, but a different number of CPU cores is a first.

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Opting for more storage will dramatically increase the price of the iPad Pro. the 11-inch version costs $999 for 256GB, $1,199 for 512GB, $1,599 for 1TB, and $1,999 for 2TB. And the 13-inch iPad Pro starts at $1,299, with prices of $1,499, $1,899, and $2,299 depending on storage capacity.

The rest of the M4 specs, including the 10-core GPU, 16-core neural engine, and 120GB/s of memory bandwidth, are found on all iPad Pro models. The new iPad Air comes with the exact same M2 chip and 8GB of RAM.

As pointed out by Ars Technica, this isn’t just a way for Apple to push people onto its more expensive iPads, though that will certainly play a part. Slightly flawed chips made using the advanced 3nm process can be partially disabled and used in the cheaper iPads instead of having to dispose of the silicon, aka chip binning.