Buying Guide
The Best Intel Core i9 CPUs for Gaming
From the Core i9-9900KF to the Core Ultra 9 285K: four processors ranked on L3 cache and boost clock, with who should skip each one.
By Alex Morgan, PC Hardware Editor
11 min read4 products evaluated
Core i9 chips add cores for streaming and creative work. Every pick is i9-class, ordered from the lowest price.
We sorted these picks by L3 cache, max boost and cores / threads, working from the makers' own data; nothing here was tested in-house, and if a maker skips L3 cache, the guide says so.
Quick Picks
Which of the 4 picks to look at first. Tap a name for the full analysis.
Lowest Price Here
Intel Core i9-9900KFThe lowest price of the group at our last check.
Best for: Buyers who would rather put the savings elsewhere than into the Core i9-9900K.
Check price for Intel Core i9-9900KF on Amazon (opens in a new tab)
Also Consider
Intel Core i9-9900K8 cores and 16 threads, the most on this platform.
Best for: Buyers who want 8 cores and 16 threads, the most on this platform.
Check price for Intel Core i9-9900K on Amazon (opens in a new tab)
Highest Boost Clock
Intel Core i9-14900KThe highest boost clock here (6GHz).
Best for: Buyers who put boost clock first.
Check price for Intel Core i9-14900K on Amazon (opens in a new tab)
Premium Pick
Intel Core Ultra 9 285KThe top of this price range, adding 8 performance and 16 efficient cores.
Best for: Spending more than the Core i9-14900K costs for the fullest feature set in this group.
Check price for Intel Core Ultra 9 285K on Amazon (opens in a new tab)
| Pick | Why it stands out | Best for | Check price |
|---|---|---|---|
| The lowest price of the group at our last check. | Buyers who would rather put the savings elsewhere than into the Core i9-9900K. | Check price for Intel Core i9-9900KF on Amazon (opens in a new tab) |
| 8 cores and 16 threads, the most on this platform. | Buyers who want 8 cores and 16 threads, the most on this platform. | Check price for Intel Core i9-9900K on Amazon (opens in a new tab) |
| The highest boost clock here (6GHz). | Buyers who put boost clock first. | Check price for Intel Core i9-14900K on Amazon (opens in a new tab) |
| The top of this price range, adding 8 performance and 16 efficient cores. | Spending more than the Core i9-14900K costs for the fullest feature set in this group. | Check price for Intel Core Ultra 9 285K on Amazon (opens in a new tab) |
Our Picks
Lowest Price Here1 of 4
Intel Core i9-9900KF
The Core i9-9900KF matches the 9900K's eight cores and sixteen threads but has no integrated graphics.
Best for
- Buyers who would rather put the savings elsewhere than into the Core i9-9900K.
Skip if
- Pass on it if no integrated graphics, so a graphics card is required rules it out for your setup.
Why we like it
The maker specifies 16MB of cache, the most among these LGA1151 chips. On L3 cache it trails the group at 16MB, while the Core i9-14900K offers 36MB. On boost clock it ties with the Core i9-9900K at 5GHz.
It matches the Core i9-9900K on rated power (95W). It shares an LGA1151 socket with the Core i9-9900K; the Core Ultra 9 285K goes with an LGA1851 socket. You also get an unlocked multiplier.
It fits only LGA1151 boards with an Intel 300-series chipset and DDR4; 100- and 200-series LGA1151 boards do not support it, and some 300-series boards need a BIOS update first. It undercut the Core i9-9900K and every other pick on price at the time of writing.
Key specs
- L3 cache
- 16MB
- Max boost
- 5GHz
- Cores / threads
- 8 cores
- Rated power
- 95W
- Threads
- 16
- Socket
- LGA1151
- Memory
- DDR4
- Integrated graphics
- No
Pros
- 8 cores and 16 threads with 16MB of cache
- Unlocked multiplier
- Rated power of 95W, ahead of the Core i9-14900K
- The lowest price of the group at our last check
Cons
- No integrated graphics, so a graphics card is required
- L3 cache trails the Core i9-14900K (36MB)
The catch
The trade-off is L3 cache; for more, the Core i9-14900K offers 36MB.
Also Consider2 of 4
Intel Core i9-9900K
The Core i9-9900K is the top of Intel's 9th generation, with eight cores, sixteen threads and a 5.0GHz boost.
Best for
- Buyers who want 8 cores and 16 threads, the most on this platform.
Skip if
- Choose another pick if you can't accept this: no cooler in the box.
Why we like it
It needs a capable cooler and a board with solid power delivery. It matches the Core i9-9900KF on rated power (95W). It shares an LGA1151 socket with the Core i9-9900KF; the Core Ultra 9 285K goes with an LGA1851 socket.
It also comes with 8 cores and 16 threads, the most on this platform and an unlocked multiplier. It fits only LGA1151 boards with an Intel 300-series chipset and DDR4; 100- and 200-series LGA1151 boards do not support it, and some 300-series boards need a BIOS update first. No cooler is included; a single-tower air cooler is enough at its rating. Its price falls between the Core i9-9900KF and the Core i9-14900K, based on our last check.
Key specs
- Max boost
- 5GHz
- Cores / threads
- 8 cores
- Rated power
- 95W
- Threads
- 16
- Socket
- LGA1151
- Memory
- DDR4
- Cooler in box
- No
Pros
- 8 cores and 16 threads, the most on this platform
- Unlocked multiplier
- Rated power of 95W, ahead of the Core i9-14900K
Cons
- No cooler in the box
- No published L3 cache
- Boost clock trails the Core i9-14900K (6GHz)
The catch
Buyers who need a confirmed L3 cache should compare it with the Core i9-14900K, which offers 36MB.
Highest Boost Clock3 of 4
Intel Core i9-14900K
The Core i9-14900K is the last LGA1700 flagship with a 6.0GHz boost clock.
Best for
- Buyers who put boost clock first.
Skip if
- Skip it if this is a deal-breaker for you: no cooler in the box.
Why we like it
Check your board has the latest BIOS for Intel's stability microcode. It matches the Core Ultra 9 285K on L3 cache (36MB). On boost clock it leads this guide at 6GHz, ahead of the Core Ultra 9 285K (5.7GHz).
On core count it ties with the Core Ultra 9 285K at 24 cores. It is the only pick here with an LGA1700 socket; the Core i9-9900K has an LGA1151 socket instead. No other pick in this guide offers DDR4 or DDR5 memory; compare the Core Ultra 9 285K, which has DDR5 memory.
You also get 8 performance and 16 efficient cores. It fits LGA1700 boards (600 and 700 series) with either DDR4 or DDR5, depending on the board; 600-series boards may need a BIOS update for 14th-gen chips. When we checked, only the Core i9-9900K and cheaper picks cost less, and the Core Ultra 9 285K cost more.
Key specs
- L3 cache
- 36MB
- Max boost
- 6GHz
- Cores / threads
- 24 cores
- Rated power
- 125W
- Threads
- 32
- Socket
- LGA1700
- Memory
- DDR4 or DDR5
- Cooler in box
- No
- Integrated graphics
- Yes
Pros
- 6GHz maximum boost
- 24 cores for encoding and background work
- Integrated graphics for display output without a graphics card
- 8 performance and 16 efficient cores
Cons
- No cooler in the box
- Costs more than the Core i9-9900KF at the time of writing
Premium Pick4 of 4
Intel Core Ultra 9 285K
The Core Ultra 9 285K is Intel's flagship on LGA1851, with 24 cores and high single-threaded clocks.
Best for
- Spending more than the Core i9-14900K costs for the fullest feature set in this group.
Skip if
- Worth skipping when no cooler in the box is a problem.
Why we like it
It suits competitive players who also stream from the same machine. On L3 cache it ties with the Core i9-14900K at 36MB. On boost clock it sits mid-pack at 5.7GHz: the Core i9-14900K offers 6GHz, and the Core i9-9900K comes in at 5GHz.
It matches the Core i9-14900K on rated power (125W). An LGA1851 socket is unique to it among these picks, while the Core i9-9900K uses an LGA1151 socket. You get DDR5 memory here, which sets it apart from the Core i9-14900K and its DDR4 or DDR5 memory.
You also get 8 performance and 16 efficient cores and a built-in NPU for AI features. It needs an LGA1851 board (Intel 800-series chipset) and DDR5 memory; LGA1700 boards and coolers without an LGA1851 mounting kit will not fit. It was the highest-priced of the 4 picks at the time of writing, so the case for it rests on what it adds over the Core i9-14900K and the rest.
Key specs
- L3 cache
- 36MB
- Max boost
- 5.7GHz
- Cores / threads
- 24 cores
- Rated power
- 125W
- Threads
- 24
- Socket
- LGA1851
- Memory
- DDR5
- Cooler in box
- No
- Integrated graphics
- Yes
Pros
- 5.7GHz maximum boost
- 24 cores for encoding and background work
- Integrated graphics for display output without a graphics card
- 8 performance and 16 efficient cores
Cons
- No cooler in the box
- Rated power trails the Core i9-9900KF (95W)
- Costs more than the Core i9-9900KF at the time of writing
The catch
The trade-off is rated power; for more, the Core i9-9900KF offers 95W.
How We Chose
Alex Morgan compared the manufacturer specifications, connectivity, warranty terms and compatibility of every pick. Figures come from the makers unless a third-party source is named; we did not test these products ourselves.
- How these picks were ranked
- We compared four processors on L3 cache, boost clock, core count and rated power as the makers state them. Nothing was tested in-house; 6 of the 9 fields compared are stated for every pick, while L3 cache and cooler in box have gaps.
- The shared baseline
- All 4, from the Core i9-9900KF to the Core Ultra 9 285K, state boost clock, core count and rated power.
- Where the specs have gaps
- The Core i9-9900K gives no L3 cache; the Core i9-9900KF gives no cooler in box.
- Price range
- At our last check the picks ran from the Core i9-9900KF ($250 to $500) to the Core Ultra 9 285K ($500 to $1000).
What to Look for in an Intel Core i9 CPUs for Gaming
Key buying criteria so you get the right fit the first time.
Boost clock across these picks
The Core i9-14900K tops boost clock at 6GHz and the Core i9-9900K sits lowest at 5GHz. The Core i9-14900K is the pick for boost clock.
Core count
Across these 4 picks core count spans 8 cores (the Core i9-9900K) to 24 cores (the Core i9-14900K). If core count is your first filter, the Core i9-14900K sets the ceiling at 24 cores.
A desktop CPU seated in its motherboard socket with the retention frame open How much rated power you need
Across these 4 picks rated power spans 125W (the Core Ultra 9 285K) to 95W (the Core i9-9900KF). Start with the Core i9-9900KF if rated power decides it.
Memory
The Core i9-9900KF and the Core i9-9900K list DDR4; the Core i9-14900K lists DDR4 or DDR5; the Core Ultra 9 285K lists DDR5.
Cooler in box
The Core i9-9900K, the Core i9-14900K and the Core Ultra 9 285K go without. Settling cooler in box first narrows 3 picks to 3.
How to Choose an Intel Core i9 CPUs for Gaming
By priority
| Priority | Consider | Why |
|---|---|---|
| Buyers who would rather put the savings elsewhere than into the Core i9-9900K | Core i9-9900KF | The lowest price of the group at our last check |
| Buyers who want 8 cores and 16 threads, the most on this platform | Core i9-9900K | 8 cores and 16 threads, the most on this platform |
| Buyers who put boost clock first | Core i9-14900K | The highest boost clock here (6GHz) |
| Spending more than the Core i9-14900K costs for the fullest feature set in this group | Core Ultra 9 285K | The top of this price range, adding 8 performance and 16 efficient cores |
Scroll sideways to see every column.
Key specs side by side
The Core i9-14900K leads on boost clock at 6GHz, ahead of the Core Ultra 9 285K at 5.7GHz. "Not listed" marks L3 cache where the Core i9-9900K leaves the figure out.
| Processor | L3 cache | Max boost | Cores / threads | Rated power |
|---|---|---|---|---|
| Core i9-9900KF | 16MB | 5GHz | 8 cores | 95W |
| Core i9-9900K | Not listed | 5GHz | 8 cores | 95W |
| Core i9-14900K | 36MB | 6GHz | 24 cores | 125W |
| Core Ultra 9 285K | 36MB | 5.7GHz | 24 cores | 125W |
Scroll sideways to see every column.
By price at the time of writing
At our last check the cheapest pick, the Core i9-9900KF, sat in the $250 to $500 tier, 2 tiers in all up to the Core Ultra 9 285K at $500 to $1000; Amazon prices move, so recheck before buying.
| Price tier | Processors |
|---|---|
| About $250 to $500 | Core i9-9900KF, Core i9-9900K, Core i9-14900K |
| About $500 to $1000 | Core Ultra 9 285K |
Frequently Asked Questions
How does the Core Ultra 9 285K compare with the Core i9-14900K on boost clock?
Between the top two, it is 6GHz on the Core i9-14900K against 5.7GHz on the Core Ultra 9 285K, a 5% difference. The Core i9-9900K closes the ranking at 5GHz.
Is the Core Ultra 9 285K worth paying more than the Core i9-9900KF?
On paper it adds boost clock (5.7GHz against 5GHz), core count (24 cores against 8 cores) and L3 cache (36MB against 16MB). It does not win everywhere: the Core i9-9900KF still leads on rated power (95W). The Core i9-9900KF sat in the $250 to $500 tier and the Core Ultra 9 285K in the $500 to $1000 tier when we checked, with 2 other picks between them; pay the difference only if boost clock and core count decide your purchase.
What makes the Core i9-14900K the Highest Boost Clock?
It carries the badge for the highest boost clock here (6GHz). The Core Ultra 9 285K is next on boost clock at 5.7GHz, so this pick's 6GHz is 5% further out. It gives up rated power (125W against 95W) to the Core i9-9900KF, the cheapest pick. It makes sense for anyone who puts boost clock first.
Do the Core i9-9900KF and the Core i9-14900K differ on socket?
The Core i9-9900KF and the Core i9-9900K use LGA1151; the Core i9-14900K uses LGA1700; the Core Ultra 9 285K uses LGA1851.
Beyond the specs, what sets the Core i9-9900KF and the Core i9-9900K apart?
The Core i9-9900KF: 8 cores and 16 threads with 16MB of cache. The Core i9-9900K: 8 cores and 16 threads, the most on this platform. The Core i9-14900K: 8 performance and 16 efficient cores.
Bottom Line
Our first pick is the Core i9-9900KF, chosen for the lowest price of the group at our last check. Look at the Core i9-9900K for 8 cores and 16 threads, the most on this platform, the Core i9-14900K for the highest boost clock here (6GHz) and the Core Ultra 9 285K for the top of this price range, adding 8 performance and 16 efficient cores if those matter more to you.
A 360mm AIO is recommended.
Related Guides
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- Related guideThe Best Budget CPUs
- Lower budgetThe Best Budget CPUs for a Gaming PC
- Higher budgetThe Best High-End CPUs for Gaming
- ExplainerHow to Choose a CPU for Your PC
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About the author
PC Hardware Editor
Alex covers PC hardware, monitors, components, upgrades and peripherals for The PC Journal, with a focus on helping readers understand specifications, compatibility and meaningful product trade-offs.
Covers: Monitors, Graphics cards, Processors, PC components, Peripherals, Upgrades and compatibility
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