M1 Ultra (20C48G)
M4 Max (14C32G)
Apple M1 Ultra (20C48G) vs Apple M4 Max (14C32G) Full Specs
20 Cores(16P+4E) 20 Threads(16P+4E) 3.23GHz | 14 Cores(10P+4E) 14 Threads(10P+4E) 4.51GHz |
TDP 220W | TDP 140W |
Bandwidth 819.2GB/s LPDDR5 | Bandwidth 409.6GB/s LPDDR5X |
iGPU | iGPU |
·· 15.93 TFLOPSFP16 | ·· 12.93 TFLOPSFP16 |
M1 Ultra (20C48G)
M4 Max (14C32G)20 Cores 16P 4E | 14 Cores 10P 4E |
20 Threads 16P 4E | 14 Threads 10P 4E |
Base Clock 3.23GHz | Base Clock 4.51GHz |
Overclocking Locked | Overclocking Locked |
L1i 192KB P 128KB E | L1i 192KB P 128KB E |
L1d 128KB P 64KB E | L1d 128KB P 64KB E |
L2 48MB P shared 4MB E shared | L2 32MB P shared 4MB E shared |
SLC Cache 96MB | SLC Cache 48MB |
Type LPDDR5 | Type LPDDR5X |
Max Memory 128GB | Max Memory 36GB |
ECC No | ECC No |
Channels 8 | Channels 3 |
Bus Width 1024-bit | Bus Width 384-bit |
Speed 6400MT/s | Speed 8533MT/s |
Bandwidth 819.2GB/s | Bandwidth 409.6GB/s |
Bandwidth Calculator Channels Transfer Rate ·· | Bandwidth Calculator Channels Transfer Rate ·· |
TDP 220W | TDP 140W |
Max Operating Temp 100°C Max | Max Operating Temp 100°C Max |
PCIe PCIe 4.0 x2855.1GB/sBandwidth | PCIe PCIe 4.0 x1631.5GB/sBandwidth |
iGPU | iGPU |
Shaders 6144 | Shaders 4096 |
Boost Clock 1.3GHz | Boost Clock 1.58GHz |
·· 15.93 TFLOPSFP16 | ·· 12.93 TFLOPSFP16 |
NPU Model H13 Eos | NPU Model H16 Aether |
NPU Cores 32 | NPU Cores 16 |
NPU Clock 1.5GHz | NPU Clock 2.36GHz |
Performance 22 TOPSFP16 | Performance 38 TOPSINT8 |
Manufacturer | Manufacturer |
ISA AArch64 | ISA AArch64 |
Architecture Apple Silicon 10ARMv8.5-A | Architecture Apple Silicon 14ARMv9.2-A |
Family | Family |
Branding  | Branding  |
Codename Jade-2C M1 UltraVariant FirestormP-Core IcestormE-Core | Codename Brava C M4 MaxVariant AS14PP-Core AS14EE-Core |
Market Segment Workstation | Market Segment Desktop |
Release Date Mar 8, 2022 | Release Date Oct 30, 2024 |
Part Number APL 1W06 | Part Number T6041 |
Foundry TSMC | Foundry TSMC |
Fabrication Node N5 | Fabrication Node N3E |
Die Size 865mm² | Die Size 454mm² |
Transistor Count 114B | Transistor Count 76B |
Transistor Density 132 MTr/mm² | Transistor Density 167 MTr/mm² |