A rare motherboard-level leak tied to iPhone 18 Pro claims Apple’s A20 Pro chip package will move DRAM using WMCM packaging, aiming for better heat dissipation, sustained performance, and a larger Neural Engine for on-device AI—though the details remain unveri
A fresh iPhone 18 Pro leak is circulating online, and it doesn’t sound like a typical spec rumor. The claim, tied to a motherboard-level look at Apple’s next flagship, points straight at the part of the system that usually decides whether performance holds steady when the phone gets hot: thermals.
The leak comes from a leaker using the name Reptalicant. who says the alleged motherboard reveals a redesigned A20 Pro chip package with improved cooling. a beefier Neural Engine. and faster memory. Motherboard-level information like this is exceptionally rare for Apple. and that rarity is part of what makes the rumor feel both dramatic and hard to prove.
At the center of the post is a packaging change. The leak says Apple would move the DRAM to the side of the A20 Pro package using WMCM. short for Wafer-Level Multi-Chip Module. instead of the current layout. The reasoning is straightforward: separating memory from the main die could help with heat dissipation. which in turn could let the chip sustain higher performance for longer during heavy workloads.
The post also lays out specific memory expectations. It claims the A20 Pro would adopt LPDDR5X 96-bit memory and that the die size would be roughly the same as the A19 Pro. In addition, the leak says the Neural Engine would be larger, aiming to push more on-device AI tasks.
On paper. the story hangs together: keep the chip’s physical footprint about the same while using packaging to improve heat flow. pair that with faster memory. and then scale up the Neural Engine for local AI work. If the claims are accurate. it would suggest Apple is leaning less on making the chip bigger and more on making it run better under real pressure—long camera sessions. sustained gaming. and heavy machine-learning workloads.
But there’s a catch, and it’s not a small one. Apple leaks at this level—detailed motherboard layouts and chip packaging information—are almost unheard of. Supply chain reports about general specifications are more common. yet the kind of granular hardware layout described here is difficult to verify this far ahead of release. The post still has no corroboration from Apple’s supply chain or other reliable leakers yet. leaving it firmly in rumor territory.
Even so, the direction the leak points toward is believable in the broad sense. Apple has been investing in better thermal management as its chips push higher performance. and improved packaging is a logical next step as on-device AI workloads keep growing. The only question is whether the specific mechanism described—WMCM moving the DRAM to the side and combining it with LPDDR5X 96-bit memory and a larger Neural Engine—matches what Apple is truly building.
For now. iPhone 18 Pro fans have a tantalizing possibility: a cooling upgrade that could keep performance steadier when it matters most. For Apple, the pitch would be simple—better heat handling through architecture beneath the surface. For everyone else. the next move is verification: not the excitement of a leak. but the hard confirmation that comes only when the hardware is finally seen up close.
iPhone 18 Pro A20 Pro WMCM DRAM cooling upgrade LPDDR5X Neural Engine on-device AI motherboard leak Reptalicant
So does that mean the iPhone will stop overheating or is this just more marketing talk?
Reptalicant?? lol I’ve never heard of that person. If Apple really moved DRAM around that’s kinda wild though. Also larger Neural Engine sounds like they’re finally gonna make Siri not useless.
I thought DRAM was on the logic board anyway. Like why would moving it “side of the package” change heat? But I’m not an engineer so idk, I just feel like iPhones always get warm fast when you play games.
WMCM sounds like something from a space program. They keep saying “cooling” but my current phone still cooks my hand when I’m on maps. If they’re putting bigger Neural Engine then that usually means more heat too, right? Also LPDDR5X 96-bit… that part doesn’t mean anything to me, sorry.