Apple's M5 Ultra Mac Studio sells 512GB of memory, and the options list is the risk
Apple restored the 512GB configuration it spent last year deleting, and put the RAM shortage on the Mac mini's sticker instead. The ceiling is the product. The ceiling is also what disappears.
The Product Desk
What happened
- Apple opened pre-orders for a new Mac Studio whose M5 Ultra configuration starts at 96GB of unified memory and reaches 512GB.
- During the past year the memory shortage had reduced the outgoing M3 Ultra Mac Studio's memory choices to 96GB only.
- The Mac mini refresh starts at $899 with the M6 chip and 16GB, a $100 increase on the previous base model.
Why it matters
- What's now possible capability One box now addresses 16 times the memory of the top Mac mini, so workloads previously chosen to fit a 32GB or 64GB node can be sized by what the model needs instead.
- What it limits constraint The M4 Max Studio's advertised 128GB ceiling ended the year as 96GB, which means the number on today's page is a supply forecast rather than a specification.
- Who has to decide decision Teams comparing rented inference against owned inference are now choosing at a fixed 2.2x premium over the Max tier, with the largest memory option available only while stock allows.
- What doesn't add up contradiction Engadget frames the refresh as much more expensive, yet the M5 Max Studio entry price did not move; the increase landed on the mini and on the Ultra's $200, which changes who is actually paying...
Next story · Product · Sep 21
Apple charges $4,000 to move the Mac Studio from 96GB to 256GB of unified memoryConfirmed9 publishers
The configuration menu is the interesting document here, not the spec sheet. Apple is again offering 512GB of unified memory on the top Mac Studio [1], after spending the past year reducing the M3 Ultra machine's memory choices to 96GB and nothing else [9]. That restored ceiling is 5.3 times what was actually orderable a day ago [19]. On the M5 Max tier, the 128GB maximum is a third more than the 96GB the M4 Max version had been trimmed to [22]. No silicon decision produced those two numbers. Supply did.
The chip underneath is two M5 Max dies bonded by a 4.4TB/s UltraFusion layer, which Apple describes as its first quad-die design [3]. Externally that shows up as up to 1.2TB/s of memory bandwidth [6], roughly double the M5 Max's 614GB/s [20], and as up to 80 GPU cores carrying Neural Accelerators for the first time on an Ultra part [2]. Apple's headline figure for the tier is LLM prompt processing in LM Studio, up to 4x an M3 Ultra [8]; Engadget records a claim of up to 4.5x faster AI compute against the same predecessor [24]. Every one of those numbers is Apple's own and untested.
The pricing tells you where the shortage was absorbed. The Ultra starts at $5,499 with 1TB of storage, $200 above the M3 Ultra configuration [13], which is 2.2 times the M5 Max entry price for approximately twice the silicon [21]. The M5 Max Studio holds at $2,499 [12]. The Mac mini, meanwhile, goes to $899, a $100 rise that Engadget counts as $300 against older minis [4][5]. So the RAM crisis reaches the cheap machine as a price and the expensive machine as a shorter list of things you are permitted to buy.
Engadget places the M5 Ultra Studio with the likes of Pixar rather than typical creatives [17]. That reading sits awkwardly next to the same publisher's account of why Mac minis kept selling out: buyers running local models, sometimes in clusters, to the point that Apple discontinued the cheapest mini in May 2026 [7]. Clustering adds throughput, but each M6 node still holds only its own 32GB at 170GB/s [4], and the M5 Pro mini stops at 64GB [16]. A single 512GB pool is 16 times the M6's ceiling and eight times the M5 Pro's [23]. For anyone whose constraint is which weights fit rather than how fast tokens arrive, that is the only comparison on the page that matters.
Which makes this a timing problem rather than a performance-per-dollar problem. The benchmark claims will hold for a year. The order page will not: the 512GB line item is precisely the one that was withdrawn last cycle, and a budget that clears in six months may find itself buying a 96GB machine with an 80-core GPU attached to it.
What to watch
- Whether the 512GB and intermediate Mac Studio memory options are still listed six months from now, or get trimmed as the M3 Ultra's were.
- Independent LM Studio and local-inference benchmarks on real weights, since every performance figure so far comes from Apple.
- Whether Apple raises memory upgrade prices on the Studio rather than removing configurations, which would move the shortage back onto the sticker.
Clarity's read
What the record supports and how the coverage leans. The claims behind it follow.
Reality
- Evidence62
- Adoption30
- Hype gap+28
- Incentives58
- Confidence64
Perspective Coverage
28 publishers- Builder
- Builder 30%
- Operator
- Operator 48%
- Investor
- Investor 22%
Claim ledger
Ranked by verification strength, evidence, and original report placement.
- [1]
Mac Studio with M5 Ultra starts with 96GB of unified memory and can be configured with up to 512GB.
- [2]
The M5 Ultra packs an up-to-80-core GPU, which Apple says is the most powerful Apple silicon GPU ever, and marks the first time Apple has added Neural Accelerators to an Ultra chip.
- [3]
The M5 Ultra is two M5 Max chips joined with Apple's 4.4TB/s UltraFusion connectivity layer, creating Apple's first-ever quad-die chip.
- [4]
The M6 Mac mini starts at $899 with 256GB of storage and 16GB of unified memory, configurable up to 32GB, with 170GB/s of memory bandwidth; that is a $100 increase over the previous base configuration.
- [5]
Engadget writes that because of the "AI RAMaggedon" the Mac mini now starts at $899, $300 more than earlier Mac mini systems.
- [6]
M5 Ultra Mac Studio memory bandwidth clocks in at up to 1.2TB/s.
- [7]
Engadget reports that AI users buying Mac minis to run local models, including in clusters, drove increased demand until Apple axed the cheapest Mac mini model in May 2026, and that Apple is now passing the costs of the AI-driven RAM crisis on to consumers.
- [8]
Apple claims the M5 Ultra Mac Studio is up to 9.8x faster at LLM prompt processing in LM Studio than Mac Studio with M1 Ultra, and up to 4x faster than M3 Ultra.
- [9]
Over the last year Apple cut the M3 Ultra Mac Studio memory options to just 96GB due to memory shortages, having launched it with up to 512GB.
- [10]
As of the day before the announcement, the M4 Max Mac Studio started at 36GB of memory and maxed out at 96GB, having launched with a 128GB maximum.
- [11]
M5 Max features an 18-core CPU and up to a 40-core GPU, starts at 36GB of unified memory and supports up to 128GB, with up to 614GB/s of unified memory bandwidth, up from up to 546GB/s on M4 Max.
- [12]
Mac Studio with M5 Max starts at $2,499 with 512GB of storage, a price unchanged from the M4 Max Mac Studio.
- [13]
Mac Studio with M5 Ultra starts at $5,499 with 1TB of storage, a $200 increase compared to the M3 Ultra configuration.
- [14]
The M5 Ultra offers up to a 36-core CPU with 12 super cores and 24 performance cores, delivering up to 1.3x higher multithreaded performance than the M3 Ultra Mac Studio.
- [15]
Apple claims the M5 Max Mac Studio is up to 10.7x faster at LLM prompt processing in LM Studio than Mac Studio with M1 Max, and 3.9x faster than M4 Max.
- [16]
The M5 Pro Mac mini supports up to 64GB of RAM with 307GB/s of memory bandwidth and costs $1,699.
- [17]
Engadget writes that the M5 Ultra Mac Studio at $5,499 is "meant more for the likes of Pixar, not typical creatives".
- [18]
The new Mac Studio lineup is available to pre-order today.
- [19]
The restored 512GB ceiling on the M5 Ultra Mac Studio is about 5.3 times the 96GB that was the only orderable M3 Ultra memory configuration before the announcement.
- [20]
The M5 Ultra's 1.2TB/s of memory bandwidth is roughly double the M5 Max's 614GB/s.
- [21]
The M5 Ultra Mac Studio's $5,499 entry price is about 2.2 times the M5 Max Mac Studio's $2,499.
- [22]
The M5 Max Mac Studio's 128GB memory ceiling is about 33 percent above the 96GB ceiling the M4 Max model had been reduced to.
- [23]
A 512GB Mac Studio holds 16 times the memory of the M6 Mac mini's 32GB maximum and 8 times the M5 Pro Mac mini's 64GB maximum.
- [24]
Engadget reports Apple claiming the M5 Ultra's up-to-80-core GPU offers up to 40 percent faster graphics than the M3 Ultra and 4.5x faster AI compute.
Sources
27 independent publishers whose own reporting we read for this story.
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1 article · August 25, 2026
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2 articles · August 25, 2026
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tidbits.com
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2 articles · August 25, 2026
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1 article · August 25, 2026
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2 articles · August 25, 2026
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