Ryzen Threadripper PRO 3955WX vs i5-661

Primary details

Comparing Core i5-661 and Ryzen Threadripper PRO 3955WX processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking	2081	187
Place by popularity	not in top-100	not in top-100
Cost-effectiveness evaluation	0.09	no data
Market segment	Desktop processor	Server
Series	no data	AMD Ryzen Threadripper
Architecture codename	Clarkdale (2010−2011)	Matisse (2019−2020)
Release date	7 January 2010 (14 years ago)	14 July 2020 (4 years ago)
Launch price (MSRP)	$252	no data

Cost-effectiveness evaluation

Performance per price, higher is better.

Detailed specifications

Core i5-661 and Ryzen Threadripper PRO 3955WX 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)	16 (Hexadeca-Core)
Threads	4	32
Base clock speed	3.33 GHz	3.9 GHz
Boost clock speed	3.6 GHz	4.3 GHz
Bus rate	2.5 GT/s	no data
Multiplier	no data	39
L1 cache	64 KB (per core)	64K (per core)
L2 cache	256 KB (per core)	512K (per core)
L3 cache	4 MB (shared)	64 MB
Chip lithography	32 nm	7 nm, 12 nm
Die size	81 mm2	74 mm2
Maximum core temperature	70 °C	no data
Maximum case temperature (TCase)	no data	95 °C
Number of transistors	382 million	3,800 million
64 bit support	+	+
Windows 11 compatibility	-	+
Unlocked multiplier	-	+

Compatibility

Information on Core i5-661 and Ryzen Threadripper PRO 3955WX 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	FCLGA1156	TR4
Power consumption (TDP)	87 Watt	280 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Core i5-661 and Ryzen Threadripper PRO 3955WX. You'll probably need this information if you require some particular technology.

Instruction set extensions	Intel® SSE4.2	no data
AES-NI	+	+
AVX	-	+
Enhanced SpeedStep (EIST)	+	no data
Turbo Boost Technology	1.0	no data
Hyper-Threading Technology	+	no data
Idle States	+	no data
Demand Based Switching	-	no data
PAE	36 Bit	no data
FDI	+	no data
Status	Discontinued	no data

Security technologies

Core i5-661 and Ryzen Threadripper PRO 3955WX technologies aimed at improving security, for example, by protecting against hacks.

TXT	+	no data
EDB	+	no data

Virtualization technologies

Virtual machine speed-up technologies supported by Core i5-661 and Ryzen Threadripper PRO 3955WX are enumerated here.

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

Memory specs

Types, maximum amount and channel quantity of RAM supported by Core i5-661 and Ryzen Threadripper PRO 3955WX. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory types	DDR3	DDR4-3200
Maximum memory size	16.38 GB	2 TiB
Max memory channels	2	no data
Maximum memory bandwidth	21 GB/s	204.8 GB/s

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics card	Intel® HD Graphics for Previous Generation Intel® Processors	-
Clear Video HD	+	-

Graphics interfaces

Available interfaces and connections of Core i5-661 and Ryzen Threadripper PRO 3955WX integrated GPUs.

Number of displays supported

2

-

Peripherals

Specifications and connection of peripherals supported by Core i5-661 and Ryzen Threadripper PRO 3955WX.

PCIe version	2.0	4.0
PCI Express lanes	16	128

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	1.60	26.17
Recency	7 January 2010	14 July 2020
Physical cores	2	16
Threads	4	32
Chip lithography	32 nm	7 nm
Power consumption (TDP)	87 Watt	280 Watt

---

Should you still have questions on choice between Core i5-661 and Ryzen Threadripper PRO 3955WX, 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.

---