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Intel Core i5-9400 Coffee Lake 4.1 GHz LGA 1151 Processor

Model Number: BX80684I59400
Web Code: 13864009

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Intel Core i5-9400 Coffee Lake 4.1 GHz LGA 1151 Processor
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Intel Core i5-9400 Coffee Lake 4.1 GHz LGA 1151 Processor

Intel Core i5-9400 Coffee Lake 4. 1 GHz LGA 1151 Processor Boasting six cores and six threads, the Core i5-9400 processor from Intel has a 2. 9 GHz base clock speed and a 4. 1 GHz maximum boost speed. Compatible with LGA 1151 motherboard sockets, this 9th-generation Core i5 CPU has a 9MB Intel Smart Cache and supports DDR4-2666 memory as well as Intel Optane Memory. The processor also features an integrated Intel UHD Graphics 630 core. Key Features 6 Cores & 6 Threads 2. 9 GHz Clock Speed 4. 1 GHz Maximum Turbo Frequency LGA 1151 Socket Specifications Essentials Product Collection: 9th Generation Intel Core i5 Processors Code Name: Products formerly Coffee Lake Vertical Segment: Desktop Processor Number: i5-9400 Status: Launched Launch Date: Q1'19 Lithography: 14 nm Use Conditions: PC/Client/Tablet Performance # of Cores: 6 # of Threads: 6 Processor Base Frequency: 2. 90 GHz Max Turbo Frequency: 4. 10 GHz Cache: 9 MB Smart Cache Bus Speed: 8 GT/s DMI3 TDP: 65 W Memory Specifications Max Memory Size (dependent on memory type): 128 GB Memory Types: DDR4-2666 Max # of Memory Channels: 2 Max Memory Bandwidth: 41. 6 GB/s ECC Memory Supported ‡: No Processor Graphics Processor Graphics ‡: Intel UHD Graphics 630 Graphics Base Frequency: 350 MHz Graphics Max Dynamic Frequency: 1. 05 GHz Graphics Video Max Memory: 64 GB 4K Support: Yes, at 60Hz Max Resolution (HDMI 1. 4)‡: 4096x2304-24Hz Max Resolution (DP)‡: 4096x2304-60Hz Max Resolution (eDP - Integrated Flat Panel)‡: 4096x2304-60Hz Direct X Support: 12 Open GL Support: 4. 5 Intel Quick Sync Video: Yes Intel In Tru 3D Technology: Yes Intel Clear Video HD Technology: Yes Intel Clear Video Technology: Yes # of Displays Supported ‡: 3 Device ID: 0X3E98/x92 Expansion Options Scalability: 1S Only PCI Express Revision: 3. 0 PCI Express Configurations ‡: Up to 1x16, 2x8, 1x8+2x4 Max # of PCI Express Lanes: 16 Package Specifications Sockets Supported: FCLGA1151 Max CPU Configuration: 1 Thermal Solution Specification: PCG 2015C (65W) Package Size:

CPU Manufacturer
CPU Type
CPU Socket Type
LGA 1151
Processor Family
Socket H4 LGA-1151
Processor Speed
2.9 GHz
L3 Cache
9 MB
  • CPU + Cooling Fan

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Rating Breakdown











Reviewer Recommendation


Of the 77 reviewers who responded, 74 would recommend this product.

Key Considerations

Averages based on how reviewers feel this product performs.

Ease of Use:


  • Good upgrade from a Core i3 8100
    Verified BuyerReviewed by rte24 - January 29, 2021

    Very good CPU and provides a good value for the last of the 1151 motherboards out there. Upgraded from a core i3 for a power user that could use more cores. The Dell Optiplex PC I put this in had an 8th gen Core i3 8100, and most boards that can use 8th gen Intel CPUs are compatible with 9th gen CPUs, too. Going from the i3 8100 and pairing the i5-9400 with faster 2666Mhz memory made a noticeable difference in performance. The current 10th gen i5 are also 6 core, but add hyperthreading for 12 threads. They require new motherboards to support socket 1200, though. This is a good way to breathe life into an older system.

    Review originally posted on bestbuy.com

    Yes, I would recommend this to a friend.
    Ease of Use:

  • Powerful processor
    Verified BuyerReviewed by tjbain - August 26, 2019

    This processor runs my 24/7 server. The server mainly handles media procurement and serving (via Plex). Thus far, nothing has slowed down the 9400. Plex routinely dishes out 2 streams of transcoded video (UHD graphics!!), and never needs to buffer or freeze. My only gripe with the processor is that it's a bit more power-hungry than my previous i5-6400t (which was specifically a low-power CPU)--but the difference equates to about $1 in power usage over the entire year. Soooo, in truth, that gripe is more about my nick-pickiness. If you're on the fence about this processor, I'm willing to bet that it'll work great for you regardless of the task. And at the price I paid for it, around $150 after rebates, it's hard NOT to recommend.

    Review originally posted on bestbuy.com

    Yes, I would recommend this to a friend.
    Ease of Use:

  • Great So Far!
    Verified BuyerReviewed by mrtyler95 - May 29, 2020

    The reason for my 4/5 star rating is because I haven’t had this processor for that long so I can’t give it an accurate long-term evaluation. But in the short time that I’ve had it, it has been great! I used the standard fan and thermal compound that came pre-installed and I have had any issues. The fan is very quiet and I don’t notice any sort of excess heat. Speeds are also very nice. I use my computer for music production; so I typically have many programs and VSTs running at one and I haven’t had any issues with running out of processing power.

    Review originally posted on bestbuy.com

    Yes, I would recommend this to a friend.
    Ease of Use:

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Please allow 3 business days from the date of order for your product to ship.

**In the event that product is unavailable, you will be refunded within 48 business hours.

Returns can be made within 14-30 days of receiving your order.

OneDealOutlet Canada Restocking Fees / Return Eligibility
Category Return Period Un-opened Opened/Unused Opened/Used
Blank Media, Computer components & Office Supplies 30 Days 0% Not Returnable Not Returnable
Laptops, Desktops, Tablets, Monitors, Printers 14 Days 0% 10% 20%

All returned products must include original packaging.

Return shipping costs will be paid by the seller for all cases where the product is defective, damaged or incorrect. For other cases (e.g. you changed your mind), you will be responsible for this cost.

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Consumable products such as battery, blank CD, DVD, Blu-Ray media, ink and printer toner are not returnable. Return shipping will be paid by seller for all cases where product is defective or damaged. For other cases (e.g. you changed your mind), you will be responsible for this cost.

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Please contact the seller directly from your Order details page, and provide the following information:

  • Web ID (8-digit number) & product description
  • Number of items to be returned
  • Date you recieved your product
  • Condition of product
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  • Reason for return

All refunds will be processed within 3-7 days