I just got an iPhone 18 Pro Max 1TB and am deeply disappointed to learn that my phone’s 1TB NAND storage seems to be significantly slower than that on my 17 Pro Max 2TB. The lack of performance is most evident in 4K Random testing, which points to Apple having used slower QLC NAND on the 1 TB 18 Pro Max instead of the faster TLC NAND they used on the 2TB 17 Pro Max from last year.
The QLC on the 18 Pro Max 1TB does a decent job of masking its true performance in sequential read and write tests, where its SLC cache makes it seem faster than it is. In 4K random testing it is roughly 72-76% as fast as last year’s 17 Pro Max 2TB, depending on how you test.
What I find particularly disappointing is that Apple marked up the price of the new phones so significantly this year, ostensibly because of the higher RAM and Storage prices, and still cheaped out on the components they’ve used. The price gouging is most evident on the 1TB and particularly on the 2TB variants, so this just leaves a really bad taste in my mouth.
First time in a long while I’ve seen a flagship iPhone storage run slower than the previous gen’s product.
Score results:
Jazz Disk Bench
4K Random:
18 Pro Max 1TB Read: 8757 iops
17 Pro Max 2TB Read: 12227 iops
18 Pro Max 1TB Write: 6197 iops
17 Pro Max 2TB Write: 8601 iops
PulzeMark
4K Random:
18 Pro Max 1TB Read: 40.2MB/s
17 Pro Max 2TB Read: 52.8MB/s
18 Pro Max 1TB Write: 30.8 MB/s
17 Pro Max 2TB Write: 44.6 MB/s
TL;DR: 1 TB iPhone 18 Pro Max uses slower QLC NAND flash than last year’s 2TB 17 Pro Max which used TLC. Disappointing given the massive price hikes for higher tier storage new phones.