Pentium Gold G6405 vs Pentium G840

Primary details

Comparing Pentium G840 and Pentium Gold G6405 processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2606	1707
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	4.61	no data
Market segment	Desktop processor	Desktop processor
Power efficiency	1.16	4.36
Architecture codename	Sandy Bridge (2011−2013)	Comet Lake-R (2021)
Release date	22 May 2011 (13 years ago)	16 March 2021 (3 years ago)
Launch price (MSRP)	$60	$64

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Pentium G840 and Pentium Gold G6405 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	2.8 GHz	4.1 GHz
Boost clock speed	2.8 GHz	4.1 GHz
Bus rate	no data	8 GT/s
L1 cache	64 KB (per core)	64 KB (per core)
L2 cache	256 KB (per core)	256 KB (per core)
L3 cache	3 MB (shared)	4 MB (shared)
Chip lithography	32 nm	14 nm
Die size	131 mm2	no data
Maximum core temperature	69 °C	100 °C
Maximum case temperature (TCase)	no data	72 °C
Number of transistors	504 million	no data
64 bit support	+	+
Windows 11 compatibility	-	+

Compatibility

Information on Pentium G840 and Pentium Gold G6405 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	FCLGA1155	FCLGA1200
Power consumption (TDP)	65 Watt	15 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Pentium G840 and Pentium Gold G6405. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.1, Intel® SSE4.2	Intel® SSE4.1, Intel® SSE4.2
AES-NI	+	+
AVX	+	+
Enhanced SpeedStep (EIST)	+	+
Turbo Boost Technology	-	-
Hyper-Threading Technology	-	+
Idle States	+	+
Thermal Monitoring	+	+
Flex Memory Access	+	no data
Turbo Boost Max 3.0	no data	-
FDI	+	no data
Fast Memory Access	+	no data

Security technologies

Pentium G840 and Pentium Gold G6405 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 Pentium G840 and Pentium Gold G6405 are enumerated here.

VT-d	-	+
VT-x	+	+
EPT	+	+

Memory specs

Types, maximum amount and channel quantity of RAM supported by Pentium G840 and Pentium Gold G6405. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-2666
Maximum memory size	32 GB	128 GB
Max memory channels	2	2
Maximum memory bandwidth	21 GB/s	41.6 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for 2nd Generation Intel® Processors	Intel UHD Graphics 610
Max video memory	no data	64 GB
Quick Sync Video	-	+
Clear Video	no data	+
Clear Video HD	-	+
Graphics max frequency	1.1 GHz	1.05 GHz
InTru 3D	-	+

Graphics interfaces

Available interfaces and connections of Pentium G840 and Pentium Gold G6405 integrated GPUs.

Number of displays supported

2

3

Graphics image quality

Maximum display resolutions supported by Pentium G840 and Pentium Gold G6405 integrated GPUs, including resolutions over different interfaces.

4K resolution support	no data	+
Max resolution over HDMI 1.4	no data	4096x2160@30Hz
Max resolution over eDP	no data	4096x2304@60Hz
Max resolution over DisplayPort	no data	4096x2304@60Hz

Graphics API support

APIs supported by Pentium G840 and Pentium Gold G6405 integrated GPUs, sometimes API versions are included.

DirectX	no data	12
OpenGL	no data	4.5

Peripherals

Specifications and connection of peripherals supported by Pentium G840 and Pentium Gold G6405.

PCIe version	2.0	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.

---

Pros & cons summary

---

Performance score	0.80	2.67
Recency	22 May 2011	16 March 2021
Threads	2	4
Chip lithography	32 nm	14 nm
Power consumption (TDP)	65 Watt	15 Watt

---

Should you still have questions on choice between Pentium G840 and Pentium Gold G6405, 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.

---