Core i9-11900KF vs Core 2 Extreme X9100

Place in the ranking	2261	423
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Desktop processor
Series	Intel Core 2 Extreme	no data
Power efficiency	2.80	11.92
Architecture codename	Penryn (2008−2011)	Rocket Lake (2021)
Release date	15 July 2008 (16 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$851	no data

Detailed specifications

Core 2 Extreme X9100 and Core i9-11900KF basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores	2 (Dual-core)	8 (Octa-Core)
Threads	2	16
Base clock speed	3.06 GHz	3.5 GHz
Boost clock speed	3.06 GHz	5.2 GHz
Bus rate	1066 MHz	8 GT/s
L1 cache	128 KB	64K (per core)
L2 cache	6 MB	256K (per core)
L3 cache	0 KB	16 MB (shared)
Chip lithography	45 nm	14 nm
Die size	107 mm²	no data
Maximum core temperature	105 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	410 Million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+
VID voltage range	1.05-1.2625V	no data

Compatibility

Information on Core 2 Extreme X9100 and Core i9-11900KF compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration	1	1
Socket	PGA478	FCLGA1200
Power consumption (TDP)	44 Watt	125 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Extreme X9100 and Core i9-11900KF. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2, Intel® AVX-512
AES-NI	-	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	2.0
Hyper-Threading Technology	-	+
TSX	-	+
Idle States	-	+
Thermal Monitoring	-	+
Demand Based Switching	-	no data
Turbo Boost Max 3.0	no data	+
AMT	+	no data
FSB parity	-	no data
Deep Learning Boost	-	+

Security technologies

Core 2 Extreme X9100 and Core i9-11900KF technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	+
EDB	+	+
Secure Key	no data	+
Identity Protection	-	+
SGX	no data	-
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Extreme X9100 and Core i9-11900KF are enumerated here.

VT-d	no data	+
VT-x	+	+
EPT	no data	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Extreme X9100 and Core i9-11900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	no data	DDR4-3200
Maximum memory size	no data	128 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	50 GB/s

Peripherals

Specifications and connection of peripherals supported by Core 2 Extreme X9100 and Core i9-11900KF.

PCIe version	no data	4.0
PCI Express lanes	no data	20

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.

Combined synthetic benchmark score

This is our combined benchmark performance rating. We are regularly improving our combining algorithms, but if you find some perceived inconsistencies, feel free to speak up in comments section, we usually fix problems quickly.

Core 2 Extreme X9100 1.35

i9-11900KF 16.34
+1110%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance.

Core 2 Extreme X9100 2063

i9-11900KF 25006
+1112%

GeekBench 5 Single-Core

GeekBench 5 Single-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses only a single CPU core.

Core 2 Extreme X9100 438

i9-11900KF 2329
+432%

GeekBench 5 Multi-Core

GeekBench 5 Multi-Core is a cross-platform application developed in the form of CPU tests that independently recreate certain real-world tasks with which to accurately measure performance. This version uses all available CPU cores.

Core 2 Extreme X9100 767

i9-11900KF 10059
+1211%

Gaming performance

Pros & cons summary

Performance score	1.35	16.34
Recency	15 July 2008	16 March 2021
Physical cores	2	8
Threads	2	16
Chip lithography	45 nm	14 nm
Power consumption (TDP)	44 Watt	125 Watt

Core 2 Extreme X9100 has 184.1% lower power consumption.

i9-11900KF, on the other hand, has a 1110.4% higher aggregate performance score, an age advantage of 12 years, 300% more physical cores and 700% more threads, and a 221.4% more advanced lithography process.

The Core i9-11900KF is our recommended choice as it beats the Core 2 Extreme X9100 in performance tests.

Be aware that Core 2 Extreme X9100 is a notebook processor while Core i9-11900KF is a desktop one.

Should you still have questions on choice between Core 2 Extreme X9100 and Core i9-11900KF, ask them in Comments section, and we shall answer.