Core i9-9900KF vs Core 2 Duo T9800

Primary details

Comparing Core 2 Duo T9800 and Core i9-9900KF processor market type (desktop or notebook), architecture, sales start time and price.

Place in performance ranking	2529	614
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	no data	15.48
Market segment	Laptop	Desktop processor
Series	Intel Core 2 Duo	Intel Core i9
Architecture codename	Penryn (2008−2011)	Coffee Lake-R (2018−2019)
Release date	1 January 2009 (15 years ago)	8 January 2019 (5 years ago)
Launch price (MSRP)	$530	$488
Current price	$248 (0.5x MSRP)	$343 (0.7x MSRP)

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core 2 Duo T9800 and Core i9-9900KF 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	2.93 GHz	3.6 GHz
Boost clock speed	2.92 GHz	5 GHz
Bus support	1066 MHz	4 × 8 GT/s
L1 cache	128 KB	64K (per core)
L2 cache	6 MB	256K (per core)
L3 cache	6 MB L2 Cache	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	No	Yes

Compatibility

Information on Core 2 Duo T9800 and Core i9-9900KF 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	no data	1
Socket	BGA479,PGA478	FCLGA1151
Power consumption (TDP)	35 Watt	95 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T9800 and Core i9-9900KF. 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
AES-NI	no data	+
AVX	no data	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	2.0
Hyper-Threading Technology	-	+
TSX	no data	+
Idle States	-	+
Thermal Monitoring	no data	+
SIPP	no data	-
Demand Based Switching	-	no data
FSB parity	-	no data
Status	Discontinued	Discontinued

Security technologies

Core 2 Duo T9800 and Core i9-9900KF technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	-
EDB	+	+
Secure Key	no data	+
MPX	no data	+
Identity Protection	no data	+
SGX	no data	Yes with Intel® ME
OS Guard	no data	+

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T9800 and Core i9-9900KF 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 Duo T9800 and Core i9-9900KF. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	no data	DDR4-2666
Maximum memory size	no data	128 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	41.6 GB/s
ECC memory support	no data	-

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo T9800 and Core i9-9900KF.

PCIe version	no data	3.0
PCI Express lanes	no data	16

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 i9-9900KF outperforms Core 2 Duo T9800 by 1399% based on our aggregate benchmark results.

---

Pros & cons summary

---

Performance score	0.79	11.84
Recency	1 January 2009	8 January 2019
Physical cores	2	8
Threads	2	16
Cost	$530	$488
Chip lithography	45 nm	14 nm
Power consumption (TDP)	35 Watt	95 Watt

---

Should you still have questions on choice between Core 2 Duo T9800 and Core i9-9900KF, ask them in Comments section, and we shall answer.

Vote for your favorite

Do you think we are right or mistaken in our choice? Vote by clicking "Like" button near your favorite CPU.

---