Intel Core 2 Quad Q9400 SLB6B 2.66GHz Quad-Core LGA 775 CPU Processors

ibuycpumo
(1000)
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US $7.99
Condition:
Used
17 available48 sold

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Shipping:
US $1.36 USPS First Class Letter .
Located in: Springfield, Missouri, United States
Delivery:
Estimated between Fri, Dec 12 and Thu, Dec 18 to 94104
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Seller does not accept returns.
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eBay item number:306346152030
Last updated on Dec 01, 2025 10:50:45 PSTView all revisionsView all revisions

Item specifics

Condition
Used: An item that has been used previously. The item may have some signs of cosmetic wear, but is ...
Country of Origin
Malaysia
L2 Cache
6 MB
Socket Type
LGA 775/Socket T
L3 Cache
6 MB
Clock Speed
2.66GHz
MPN
BX80580Q9400
Item Length
3.14inch
Processor Type
Core 2 Quad
Brand
Intel
Manufacturer Warranty
1 Year
Item Height
0.039inch
Model
Q9400
Processor Model
Intel Core 2 Quad Q9400
Cooling Component Included
None/Processor only
Bus Speed
1333 MHz
Number of Cores
4
Item Width
0.9inch
UPC
Does not apply
Category

Item description from the seller

About this seller

ibuycpumo

98.5% positive feedbackโ€ข3.7K items sold

Joined Feb 2022
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Detailed seller ratings

Average for the last 12 months
Accurate description
4.7
Reasonable shipping cost
5.0
Shipping speed
4.7
Communication
4.8

Popular categories from this store

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ScrapXeon CPUCore 2 DuoCore 2 QuadIntel Confidential (ES)Server/Network EquipmentIntel Core iMonitorOther

Seller feedback (813)

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Positive
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  • _***v (138)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    CPU arrived securely and works very well with my PC! Great condition and appearance! A++++
  • k***l (1585)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Great item, fast shipping. A+++++
  • 7***7 (165)- Feedback left by buyer.
    Past 6 months
    Verified purchase
    Great Seller! Item was as described, shipping was very fast and processor works great and it breathed new life into an old Optiplex 755. Thanks!
See all feedback

Product ratings and reviews

Learn more
4.9
105 product ratings
  • 95 users rated this 5 out of 5 stars
  • 7 users rated this 4 out of 5 stars
  • 3 users rated this 3 out of 5 stars
  • 0 users rated this 2 out of 5 stars
  • 0 users rated this 1 out of 5 stars

Performs well

Reliable

Easy to install

Most relevant reviews

See all 82 reviews
  • by revandenberg
    Dec 27, 2017Top favorable review

    One of the best socket 775 CPU's

    I replaced a Q6600 CPU with this Q9400. According to CPUBoss: "When it comes to benchmarks, the overclocked Intel Core 2 Quad Q9400 processor was able to complete the benchmark just as fast as the Intel Core i7 940 processor, which is wicked fast." But, according to UserBenchmark, the Q9400 ranks 486 out of 980 against a modern Core i9 7980XE at 1 of 980. "Considering its age it performs well in recent games'. And at a fraction ($ 13) of the cost of an i9 7980XE ($ 2.000). My (2nd) PC runs extremely well.

    Verified purchase: YesCondition: Pre-OwnedSold by: gtron7

  • by djlemasdonald
    Jul 29, 2017Top critical review

    better than what i had

    well I have a asus p5k mother board that had a 2 core duo I replaced it with the 4 core and flashed the bios and it ran windows 10 great I use the system for retro gamming

    Verified purchase: YesCondition: Pre-OwnedSold by: techreuseny15

  • by ghne08
    May 16, 2022

    INTEL CORE 2 QUAD Q9400 W

    Nice Processor for a OLD 775 SOCKET, great perfomance and improves alot instead of Intel Core 2 Duo E8500, easy to install and best product.

    Verified purchase: YesCondition: Pre-OwnedSold by: gift.for.today

  • by dachor47
    Nov 20, 2019

    Good replacement CPU for cheap

    Trying to squeeze a little more life out of a very old computer. The CPU worked as soon as I installed it. For the price, I am very satisfied. I'm still waiting to see if I can get Windows 10 to work at a usable level.

    Verified purchase: YesCondition: Pre-OwnedSold by: solooper2012

  • by thebigdivot48
    Mar 29, 2016

    Intel core 2 quad Q9400 2.66GHz Quad Core Socket 775 CPU 2.66/6M/1333 SLB6B

    A very easy installation into a Dell XPS420 desk top. There were no funny clitches or down loads to make it work. It was plug and play. I would recommend this upgrade.

    Verified purchase: YesCondition: Pre-OwnedSold by: atomicoverload

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