Intel Core i5-2405S Review

Intel Core i5-2405S Review


The latest in the LGA1155 line of CPUs is the i5-2405S. Whilst many processors get bigger and better with more speed, ever tinier nm processes etc, this is squarely aimed at the energy efficient, low-power end of the market.

With a TDP of only 65W and a clock speed of 2.5GHz this is either a serious attempt to lower the energy consumption of businesses or, like the famed 65W E6800, a potential powerhouse.

Let’s find out which one it is shall we.

Technical Specifications

A quick glance through the specification table and we see that this is pretty much a standard Core i5 processor. We have four non-HT cores, a bit of Turbo performance boost, all very standard fare. 

The big change with the i5-2405S compared to, for example, the Core i5-2500K we use in our Sandy Bridge bench rig is the much tighter multiplier restrictions that limit overclocking potential and the obvious reduction from a TDP of 95W to 65W.

Status Launched
Launch Date Q2’11
Processor Number i5-2405S
# of Cores 4
# of Threads 4
Clock Speed 2.5 GHz
Max Turbo Frequency 3.3 GHz
Bus/Core Ratio 25
DMI 5 GT/s
Instruction Set 64-bit
Instruction Set Extensions SSE4.1/4.2, AVX
Embedded Options Available No
Lithography 32 nm
Max TDP 65 W
Recommended Channel Price $205.00
# of Memory Channels 2
Max Memory Bandwidth 21 GB/s
ECC Memory Supported No
Processor Graphics Intel® HD Graphics 3000
Graphics Base Frequency 850 MHz
Graphics Max Dynamic Frequency 1.1 GHz
Intel® Quick Sync Video Yes
Intel® InTru™ 3D Technology, Yes
Intel® Insider™ Yes
Intel® Wireless Display No
Intel® Flexible Display Interface (Intel® FDI) Yes
Intel® Clear Video HD Technology Yes
Dual Display Capable Yes
Max CPU Configuration 1
TCASE 69.1°C
Package Size 37.5mm x 37.5mm
Sockets Supported FCLGA1155, LGA1155
Low Halogen Options Available Yes
Intel® Turbo Boost Technology 2.0
Intel® vPro Technology No
Intel® Hyper-Threading Technology No
Intel® Virtualization Technology (VT-x) Yes
Intel® Virtualization Technology for Directed I/O (VT-d) No
Intel® Trusted Execution Technology No
AES New Instructions Yes
Intel® 64 Yes
Idle States Yes
Enhanced Intel SpeedStep® Technology Yes
Thermal Monitoring Technologies Yes
Intel® Fast Memory Access Yes
Intel® Flex Memory Access Yes
Execute Disable Bit Yes