Pentium Gold 6405U vs Core 2 Duo T9900

Primary details

Comparing Core 2 Duo T9900 and Pentium Gold 6405U processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2651	2028
Place by popularity	not in top-100	not in top-100
Market segment	Laptop	Laptop
Series	Intel Core 2 Duo	Intel Comet Lake
Power efficiency	2.03	10.91
Architecture codename	Penryn (2008−2011)	Comet Lake-U (2019−2020)
Release date	2 June 2009 (15 years ago)	31 October 2019 (5 years ago)
Launch price (MSRP)	$530	$161

Detailed specifications

Core 2 Duo T9900 and Pentium Gold 6405U 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)	2 (Dual-core)
Threads	2	4
Base clock speed	3.06 GHz	2.4 GHz
Boost clock speed	0.07 GHz	2.4 GHz
Bus rate	1066 MHz	4 GT/s
L1 cache	64 KB (per core)	256 KB
L2 cache	6 MB (shared)	1 MB
L3 cache	6 MB L2 Cache	2 MB
Chip lithography	45 nm	14 nm
Die size	107 mm2	no data
Maximum core temperature	105 °C	100 °C
Number of transistors	410 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+
VID voltage range	1.05V-1.2125V	no data

Compatibility

Information on Core 2 Duo T9900 and Pentium Gold 6405U 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	BGA479,PGA478	FCBGA1528
Power consumption (TDP)	35 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core 2 Duo T9900 and Pentium Gold 6405U. You'll probably need this information if you require some particular technology.

Instruction set extensions	no data	Intel® SSE4.1, Intel® SSE4.2
AES-NI	-	+
Enhanced SpeedStep (EIST)	+	+
Speed Shift	no data	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	+
Idle States	no data	+
Thermal Monitoring	-	+
Flex Memory Access	no data	+
Demand Based Switching	-	no data

Security technologies

Core 2 Duo T9900 and Pentium Gold 6405U technologies aimed at improving security, for example, by protecting against hacks.

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

Virtualization technologies

Virtual machine speed-up technologies supported by Core 2 Duo T9900 and Pentium Gold 6405U are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core 2 Duo T9900 and Pentium Gold 6405U. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR2, DDR3	DDR4
Maximum memory size	no data	64 GB
Max memory channels	no data	2
Maximum memory bandwidth	no data	37.5 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	On certain motherboards (Chipset feature)	Intel® UHD Graphics for 10th Gen Intel® Processors
Max video memory	no data	32 GB
Quick Sync Video	-	+
Clear Video	no data	+
Clear Video HD	no data	+
Graphics max frequency	no data	950 MHz

Graphics interfaces

Available interfaces and connections of Core 2 Duo T9900 and Pentium Gold 6405U integrated GPUs.

Number of displays supported	no data	3
eDP	no data	+
DisplayPort	-	+
HDMI	-	+
DVI	no data	+

Graphics image quality

Maximum display resolutions supported by Core 2 Duo T9900 and Pentium Gold 6405U integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2304@24Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	4096x2304@60Hz

Graphics API support

APIs supported by Core 2 Duo T9900 and Pentium Gold 6405U integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Core 2 Duo T9900 and Pentium Gold 6405U.

PCIe version	no data	2.0
PCI Express lanes	no data	12

Pros & cons summary

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Performance score	0.75	1.73
Recency	2 June 2009	31 October 2019
Threads	2	4
Chip lithography	45 nm	14 nm
Power consumption (TDP)	35 Watt	15 Watt

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Should you still have questions on choice between Core 2 Duo T9900 and Pentium Gold 6405U, ask them in Comments section, and we shall answer.

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