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Intel Core i5-8400

Physical Product · CPUs · 9 mentions · 1 subreddit · discussed in r/buildapc

Reddit take

Not enough linked mention summaries yet; the source excerpts below are the evidence.

Pros

  • A used Dell Optiplex with an i5-8400 costs under $150, add an SSD to that and you've got a GREAT office PC for under 300 bucks. That's what I would do.
  • No rest for the wicked's minimum requirement for cpu is i5-8400, which is faster than a 7700 with 6-cores.

Cons

  • i5 8400
  • I recently bought a gaming pc for 300$ with a i5-8400 and a gtx 1080 i got 16gb of ddr4 dont know the speed and i have a 750w psu
  • It's fine. i5-8400 is an earlier ddr4 CPU so really it's designed with slower RAM in mind. 2666 ram won't have as much of an effect as a newer CPU. It's important to manage your expectations, though. In newer games you might need to add...
  • That CPU is too old to consider.
  • The CPU is a notably ancient i5 8400, which I have no interest in using. My relatively simple Dell Vostro laptop CPU runs circles around this thing.

Sentiment

2 positive (22%) · 1 mixed (11%) · 6 negative (67%)

Trust + time weighted score: -44% · raw score -44%

What redditors said (9 of 9)

i5 8400
negative · u/S****1 · r/buildapc · Jan 31, 2026 · open on Reddit ↗
I recently bought a gaming pc for 300$ with a i5-8400 and a gtx 1080 i got 16gb of ddr4 dont know the speed and i have a 750w psu
negative · u/M****e · r/buildapc · Mar 26, 2026 · open on Reddit ↗
It's fine. i5-8400 is an earlier ddr4 CPU so really it's designed with slower RAM in mind. 2666 ram won't have as much of an effect as a newer CPU. It's important to manage your expectations, though. In newer games you might need to add an fps cap for better stability since i5-8400 is a decent, but older CPU. Still meets requirements for 95 percent of games tho!!
mixed · u/I****1 · r/buildapc · comment · Mar 20, 2026 · open on Reddit ↗
A used Dell Optiplex with an i5-8400 costs under $150, add an SSD to that and you've got a GREAT office PC for under 300 bucks. That's what I would do.
positive · u/I****1 · r/buildapc · comment · Feb 20, 2026 · open on Reddit ↗
No rest for the wicked's minimum requirement for cpu is i5-8400, which is faster than a 7700 with 6-cores.
positive · u/t****z · r/buildapc · comment · Feb 15, 2026 · open on Reddit ↗
That CPU is too old to consider.
negative · u/n****e · r/buildapc · comment · Feb 9, 2026 · open on Reddit ↗
The CPU is a notably ancient i5 8400, which I have no interest in using. My relatively simple Dell Vostro laptop CPU runs circles around this thing.
negative · u/L****8 · r/buildapc · Mar 19, 2026 · open on Reddit ↗
I've been told my parts are awful but i really can't buy a whole new pc all at once. I currently have: Windows 11 intel i5 8400,
negative · u/s****1 · r/buildapc · Feb 20, 2026 · open on Reddit ↗
My components are: Intel(R) Core(TM) i5-8400
negative · u/J****C · r/buildapc · Feb 2, 2026 · open on Reddit ↗ · attribution unverified

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