Intel Itanium 9540 vs Intel Xeon 6556P-B Full Specs - HMC

8 Cores 16 Threads 2.13GHz	36 Cores 72 Threads 2.3GHz
TDP 170W	TDP 215W
Bandwidth 42.7GB/s DDR3	Bandwidth 204.8GB/s DDR5
iGPU 0	iGPU 0
Socket LGA 1248	Socket BGA 4368

Itanium 9540

Itanium 954042.7GB/s

x1

Xeon 6556P-B

Xeon 6556P-B204.8GB/s

x4.80

8 Cores	36 Cores
16 Threads	72 Threads

Base Clock 2.13GHz	Base Clock 2.3GHz
Boost Clock -	Boost Clock 3.5GHz
Overclocking Locked	Overclocking Locked

L1i 16KB	L1i 64KB
L1d 16KB	L1d 48KB
L2 768KB	L2 2MB
L3 24MB	L3 144MB

Type DDR3	Type DDR5
Max Memory 512GB	Max Memory 1.13TB
ECC No	ECC Yes
Channels 4	Channels 4
Bus Width 256-bit	Bus Width 256-bit
Speed 1333MT/s	Speed 6400MT/s
Bandwidth 42.7GB/s	Bandwidth 204.8GB/s
Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 42.7GB/s	Bandwidth Calculator Channels Transfer Rate Calculated Bandwidth 204.8GB/s

TDP 170W	TDP 215W
Max Operating Temp 95°C Max	Max Operating Temp -
T-Case -	T-Case 85°C Max
Voltage Range -	Voltage Range -

Bus Type QPI	Bus Type -
Bus Config 16-bit	Bus Config -
Bus Speed 6.4GT/s	Bus Speed -
Bus Bandwidth 12.8GB/s	Bus Bandwidth -

-	PCIe PCIe 5.0 x32 126GB/sBandwidth
-	PCIe Secondary PCIe 4.0 x16 31.5GB/sBandwidth

Manufacturer Intel	Manufacturer Intel
ISA IA-64	ISA x86-64
Architecture Itanium	Architecture Granite Rapids
Family Itanium	Family Xeon 6
Branding	Branding
Codename Poulson - - - -	Codename Granite Rapids-D 27Die Granite Rapids-HCCVariant Redwood CoveP-Core 36M-Core
Market Segment Server	Market Segment Server
Release Date Nov 8, 2012	Release Date Feb 24, 2025

Foundry Intel	Foundry Intel
Other Foundries -	Other Foundries IntelIO
Fabrication Node 32nm -	Fabrication Node Intel 3 Intel 7IO
Die Size 544mm² -	Die Size 598mm² 482mm²IO
Transistor Count 3.1 Billion	Transistor Count -
Transistor Density 6 MTr/mm²	Transistor Density -

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