Quick Verdict
The i3-9300 is a minor tweak on the 9100, offering a bit more cache and slightly better efficiency, but its OEM-exclusive nature and 4-thread limit make it irrelevant for DIY builders.
Overview
Launch
2019
Status
End-of-lifeGeneration
9th Gen (Coffee Lake Refresh)
Market
Desktop
The Intel Core i3-9300 is an OEM-exclusive 4-core, 4-thread desktop processor featuring an 8 MB L3 cache, a 62 W TDP, and slightly elevated clocks, created specifically to help system builders differentiate product lines.
The Core i3-9300 features 4 cores and 4 threads with a 3.7 GHz base clock, 4.3 GHz boost, and an 8 MB L3 cache.
Its 62 W TDP and OEM-only distribution made it a tool for pre-built PC manufacturers to upsell from the base 9100.
Specifications
Performance
The 8 MB cache helps keep frequently used office applications responsive.
4 threads are insufficient for meaningful virtualization.
Slightly better than the 9100 due to cache and clocks, but 4 threads remain a hard bottleneck.
The 62 W TDP makes it slightly more efficient per clock than the 65 W 9100.
- •Can handle very light esports at low settings if paired with a dedicated GPU
- •The 4-thread limit causes significant stuttering in modern games
- •No AI capabilities
Architecture
14nm
Process Node
Coffee Lake
Codename
4C / 4T
Core Config
8 MB
L3 Cache
62 W
TDP
Architecture Overview
The i3-9300 is essentially a hybrid SKU. It uses 4 Coffee Lake cores without Hyper-Threading, but unlike the standard i3-9100, it is equipped with the larger 8 MB L3 cache typically found on Core i5 processors.
CPU Design
The 3.7 GHz base clock and 4.3 GHz boost are modest improvements over the i3-9100. The larger L3 cache is the defining feature, reducing the frequency at which the CPU must fetch data from system RAM.
Memory Subsystem
It supports dual-channel DDR4 memory, officially rated for 2400 MT/s. The larger cache helps mask the relatively low memory bandwidth.
PCIe & I/O
16 lanes of PCIe 3.0 are provided for standard connectivity.
Overclocking
The multiplier is locked. The 62 W TDP suggests it is not meant for the heavy sustained loads required for BCLK overclocking.
- 8 MB L3 cache (up from 6 MB on the 9100)
- 100 MHz higher base and all-core boost clocks
- Lower 62 W TDP (down from 65 W)
Key Highlights
- 8 MB L3 cache provides a tangible latency reduction
- 62 W TDP is slightly more efficient than the 65 W standard
- Higher clocks than the i3-9100 out of the box
- UHD 630 included for display output
- ECC memory support (if motherboard allows)
- OEM-exclusive, impossible to buy at retail
- Only 4 cores and 4 threads
- No Hyper-Threading
- Memory locked to DDR4-2400 MT/s
- Outclassed by cheap used AMD Ryzen parts
History
The Core i3-9300 is a textbook example of semiconductor product segmentation. Launched in April 2019 alongside the retail 9th-gen lineup, it existed solely to give OEMs like HP, Dell, and Lenovo a seemingly superior option to put in their mid-range pre-built desktops. By taking a Coffee Lake die with 8 MB of L3 cache—normally reserved for the Core i5—and disabling Hyper-Threading, Intel created a chip that sounded great on a spec sheet but cost very little to produce.
</br>The 62 W TDP was another carefully chosen specification, allowing OEMs to claim their systems were more power-efficient than those using the standard 65 W i3-9100. In reality, the performance difference between the two was marginal. The 9300 was never meant to be evaluated by reviewers or purchased by enthusiasts; it was engineered to be a bullet point on a Best Buy shelf tag, tricking consumers into paying a slight premium for what was functionally a 4-thread office processor.
Improvements over Previous Generation
- 8 MB L3 cache (up from 6 MB on the 9100)
- 100 MHz higher base and all-core boost clocks
- Lower 62 W TDP (down from 65 W)
Alternatives & Competitors
Should You Buy It?
Not Recommended for the right buyer
The i3-9300 should only be considered if you are purchasing a pre-built desktop from an OEM (like HP or Lenovo) that happens to use this chip, and the price is heavily discounted. The 8 MB cache makes it a slightly better performer than a 9100 in single-task office environments. If you are building a PC yourself, you cannot buy this chip, and you shouldn't try to hunt it down on the grey market.
Avoid if…
- Building a custom PC
- You need a CPU for gaming or heavy workloads
- You find it on eBay for more than a standard i3-9100 costs
Use Cases
Interesting Facts
It features the 8 MB L3 cache of a Core i5, but Intel disabled Hyper-Threading to keep it in the i3 family.
The UHD 630 graphics run at a higher maximum frequency (1150 MHz) than the standard i3-9100 (1050 MHz).
It had a unique 62 W TDP, distinct from the standard 65 W desktop parts.
It was never officially listed on Intel's main consumer ARK database, existing primarily in OEM spec sheets.
The 4.0 GHz all-core turbo is 100 MHz higher than the i3-9100's all-core turbo.
OEMs used the 9300 as a $20-$30 upsell over the 9100 in pre-built desktop lineups.
Despite the cache upgrade, it still lacks AVX-512 instructions.
The '9300' naming made it sound like a Core i9 to uninformed consumers, which sometimes benefited OEM sales.
It uses the same FC-LGA14C package as the rest of the 8th/9th-gen family.
Its existence proves Intel actively modifies cache sizes simply to create artificial product tiers.
People Also Ask
What is the difference between i3-9100 and i3-9300?
The 9300 has an 8 MB L3 cache (vs 6 MB), slightly higher clocks, and a 62 W TDP (vs 65 W), but both have 4 cores/4 threads.
Can I buy the Intel Core i3-9300?
No, it was an OEM-exclusive processor and was never sold directly to consumers.
Does the i3-9300 have Hyper-Threading?
No, like all 9th-gen desktop i3s, it is limited to 4 threads.
Why does the i3-9300 have 8 MB cache?
Intel likely used higher-bin dies (intended for i5s) that had defective Hyper-Threading controllers, passing them off as premium i3s.
What is the TDP of the i3-9300?
62 Watts.
Does the i3-9300 support ECC memory?
Yes, officially, though consumer motherboards rarely support it.
Is the i3-9300 good for gaming?
No, 4 threads are a severe bottleneck for modern games.
What generation is the i3-9300?
9th Generation (Coffee Lake Refresh).
What socket does the i3-9300 use?
LGA 1151.
What graphics does it have?
UHD Graphics 630, running up to 1150 MHz.
Frequently Asked Questions
What is the base clock?
3.7 GHz.
What is the boost clock?
4.3 GHz.
What is the all-core turbo?
4.0 GHz.
How much L3 cache?
8 MB.
What is the launch price?
$143.
Does it support PCIe 4.0?
No, PCIe 3.0.
Can it be overclocked?
No.
What is the part number?
SRCZU.
Does it support AVX-512?
No.
What is the max temperature?
TCase Max 72°C, TJ Max 100°C.