Quick Verdict
A fun overclocking toy in 2017, but the lack of Hyper-Threading and a high 91W TDP make it a poor value compared to even cheap modern chips.
Overview
Launch
2017
Status
End-of-lifeGeneration
8th Generation
Market
Desktop
The Intel Core i3-8350K is an unlocked 8th-generation desktop processor that holds the distinction of being the first-ever Core i3 to feature an unlocked multiplier, aimed at budget overclocking enthusiasts.
The i3-8350K starts at 4.0 GHz but features an unlocked multiplier for extreme overclocking. It shares the 8MB cache of the i5 tier but lacks Hyper-Threading, drawing 91W at stock settings.
Specifications
Performance
Overclocking does not add threads. For heavily threaded productivity work, a stock 6-core CPU will easily beat an overclocked 4-core i3.
4 threads is a hard limit for virtualization, regardless of how fast those threads run.
At stock speeds, it is comparable to other 8th-gen i3s. When overclocked to 5.0 GHz+, it can match stock i5s in eSports titles, but the lack of threads hurts in modern AAA games.
Terrible efficiency. Pushing 1.3V+ through 14nm silicon to hit 5.0 GHz results in massive power draw and heat.
- •Requires heavy overclocking to be relevant
- •High clock speeds benefit older eSports titles
- •4 cores/4 threads is a severe limitation for modern AAA gaming
- •No AI acceleration
- •High clock speed cannot compensate for lack of AI instructions
Architecture
14nm
Process Node
Coffee Lake
Codename
4C / 4T
Core Config
8 MB
L3 Cache
91 W
TDP
Architecture Overview
The i3-8350K is architecturally identical to the i3-8300, but it is specifically binned for frequency tolerance and features an unlocked power delivery system.
CPU Design
It utilizes the 14nm Coffee Lake architecture with 4 active physical cores on a die that natively supports 6 cores and 8MB of L3 cache. The 'K' suffix means Intel removed the power limits (PL1/PL2) that restrict standard CPUs. It also lacks Hyper-Threading, meaning it can only process 4 threads simultaneously. While it ships at a fixed 4.0 GHz, the unlocked multiplier allows users to increase this frequency arbitrarily, assuming they can provide enough voltage and cooling to maintain stability.
Memory Subsystem
It supports dual-channel DDR4 memory officially capped at 2400 MT/s. However, because this chip was targeted at enthusiasts using Z370 motherboards, users almost universally bypassed this limit by enabling XMP profiles to run DDR4-3200 or faster, which the silicon handled fine.
PCIe & I/O
16 PCIe 3.0 lanes are provided directly from the CPU.
Overclocking
This is the chip's sole purpose. Enthusiasts regularly pushed this silicon past 5.0 GHz on high-end air cooling, past 5.2 GHz on custom water cooling, and past 5.8 GHz using liquid nitrogen. It was a favorite for world-record attempts in the 4-core category.
- Doubling of physical cores (2 to 4)
- 8MB L3 cache (up from 4MB)
- Significantly higher overclocking headroom
- Migration to LGA 1151 v2 platform
Key Highlights
- First unlocked i3, historic significance
- Massive overclocking headroom (5.0 GHz+ on air)
- 8MB L3 cache aids high-frequency stability
- Fun project chip for hardware enthusiasts
- High stock clock of 4.0 GHz
- No Hyper-Threading (4 cores, 4 threads only)
- Requires expensive Z-series motherboard
- Terrible power efficiency when overclocked
- Outperformed by cheaper locked 6-core CPUs
- Obsolete LGA 1151 v2 platform
History
The Core i3-8350K was Intel's bold attempt to capture the extreme budget overclocking market, a space that had been entirely ignored up until its release in October 2017. Historically, the 'K' suffix was reserved exclusively for the i5 and i7 tiers. By bringing it to the i3, Intel acknowledged the growing community of enthusiasts who loved pushing cheap silicon to its absolute limits.
</br></br>To make the 8350K viable, Intel gave it the best binning of the i3 lineup. It featured the full 8MB L3 cache of a 6-core die and a stock clock of 4.0 GHz.
The community responded with enthusiasm. Forums filled with screenshots of 8350Ks hitting 5.0 GHz on $30 air coolers.
It became a staple for 'delidding' tutorials, where users would remove the integrated heat spreader to replace Intel's thermal paste with liquid metal, often unlocking an extra 200 MHz.</br></br>However, its time in the sun was brief. While the 8350K could match a stock i5-8400 in frequency-sensitive tasks, AMD's Ryzen 5 1600 offered 12 threads for a similar total platform price.
As games and applications became more heavily threaded, the 8350K's lack of Hyper-Threading became an insurmountable flaw. Intel quietly retired the 'K' suffix from the i3 lineup after the 9th generation, making the 8350K a unique, one-of-a-kind experiment in CPU segmentation.
Improvements over Previous Generation
- Doubling of physical cores (2 to 4)
- 8MB L3 cache (up from 4MB)
- Significantly higher overclocking headroom
- Migration to LGA 1151 v2 platform
Alternatives & Competitors
Should You Buy It?
Not Recommended for the right buyer
You should avoid buying the Intel Core i3-8350K unless you are a dedicated overclocking hobbyist looking for a cheap project chip to practice manual tuning, delidding, or extreme cooling on. If you fall into that niche, buying a used 8350K for $20 and pushing it to 5.0 GHz can be incredibly fun and educational. However, for any practical use case—gaming, work, or productivity—this chip is a poor investment. It requires an expensive Z370 or Z390 motherboard to utilize its only feature (overclocking), yet a locked Ryzen 5 3600 on a cheap B450 board will destroy it in every multi-threaded benchmark while using less power. The lack of Hyper-Threading is a fatal flaw that no amount of frequency can fix. Spend your money on modern hardware.
Avoid if…
- You want good gaming performance per dollar
- You do not plan to manually overclock
- You need to multitask heavily
- You are buying a new motherboard for it
Use Cases
Interesting Facts
It was the very first Core i3 in Intel's history to have an unlocked multiplier.
Overclockers regularly pushed this chip past 5.0 GHz on standard $30 air coolers.
Under liquid nitrogen, the i3-8350K held world records for the highest clock speed on a 4-core CPU.
It has an 8MB L3 cache, meaning it is likely a binned 6-core die with 2 cores disabled.
Despite the 'K' suffix, it still lacks Turbo Boost; the 4.0 GHz is a base clock, not a boost.
It launched at $168, which was $50 more than the locked i3-8100, purely for the unlocked multiplier.
The 91W TDP is just a baseline; overclocked systems easily drew over 150W from the wall.
Many users 'delidded' this processor (removing the integrated heat spreader) to achieve higher overclocks due to Intel's thermal paste.
It was completely overshadowed by the Ryzen 5 1600, which offered 12 threads for a similar total platform price.
Its integrated UHD 630 graphics could be overclocked alongside the CPU on Z370 boards.
People Also Ask
Can you overclock the Intel Core i3-8350K?
Yes, it features a fully unlocked multiplier, allowing for extensive manual overclocking.
How high can the i3-8350K overclock?
On good air or water cooling, 5.0 to 5.2 GHz is common. Under liquid nitrogen, it can exceed 5.8 GHz.
Does the i3-8350K have Hyper-Threading?
No, it has 4 physical cores and 4 threads. Intel did not add HT to the i3 until the 10th generation.
What motherboard do I need for the i3-8350K?
You need a Z370 or Z390 motherboard to access the unlocked multiplier settings.
Is the i3-8350K good for gaming?
When heavily overclocked, it can handle eSports, but its lack of threads makes it poor for modern AAA gaming compared to modern budget CPUs.
Why does the i3-8350K have 8MB of cache?
It is likely a binned 6-core Coffee Lake die with 2 cores disabled, leaving the full 8MB L3 cache intact.
What is the TDP of the i3-8350K?
91 Watts at stock settings, but expect much higher power draw when overclocked.
Does it have Turbo Boost?
No, it runs at a fixed 4.0 GHz base clock, which can then be increased via the unlocked multiplier.
Is it worth buying an i3-8350K in 2024?
No, unless you are buying it for under $20 specifically to practice overclocking.
What socket does the i3-8350K use?
LGA 1151 (v2).
Frequently Asked Questions
What is the launch price?
$168.
What is the part number?
SR3N4.
What is the max temperature?
72°C Tcase / 100°C Tjunction.
Does it support ECC?
Yes, according to specification sheets.
What is the L2 cache?
256 KB per core.
What are the integrated graphics?
UHD Graphics 630 (up to 1150 MHz).
When was it released?
October 5, 2017.
What is the die size?
126 mm².
Does it support DDR4-3200?
Officially only DDR4-2400, but Z-series boards allow faster speeds via XMP.
What process node?
14nm.