Buying Guide
The Best CPUs for Multitasking
From the Core i5-14400F to the Ryzen 9 7900: four processors ranked on L3 cache and boost clock, with who should skip each one.
By The PC Journal editorial team
11 min read4 products evaluated
Multitasking rewards threads more than peak clocks. Every pick has 16 or more threads and cost $300 or less.
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 any figure a maker omits is noted as missing.
Quick Picks
Our 4 recommendations at a glance. Tap a pick for the full verdict.
Largest Game Cache
AMD Ryzen 9 7900
The largest L3 cache here (64MB).
Best for: Players chasing 1% lows in simulation and esports titles.
Our take Check price for AMD Ryzen 9 7900 (opens in a new tab)
Highest Core Count
Intel Core i5-14600KF
The highest core count here (14 cores).
Best for: Buyers who put core count first.
Our take Check price for Intel Core i5-14600KF (opens in a new tab)
Lowest Price Here
Intel Core i5-14400F
The cheapest way into this group, below the Ryzen 7 5700X.
Best for: Buyers who would rather put the savings elsewhere in the build.
Our take Check price for Intel Core i5-14400F (opens in a new tab)
Also Consider
AMD Ryzen 7 5700X
Eight cores on the DDR4 AM4 platform.
Best for: Buyers who want eight cores on the DDR4 AM4 platform.
Our take Check price for AMD Ryzen 7 5700X (opens in a new tab)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
| The largest L3 cache here (64MB). | Players chasing 1% lows in simulation and esports titles. | Check price for AMD Ryzen 9 7900 (opens in a new tab) |
| The highest core count here (14 cores). | Buyers who put core count first. | Check price for Intel Core i5-14600KF (opens in a new tab) |
| The cheapest way into this group, below the Ryzen 7 5700X. | Buyers who would rather put the savings elsewhere in the build. | Check price for Intel Core i5-14400F (opens in a new tab) |
| Eight cores on the DDR4 AM4 platform. | Buyers who want eight cores on the DDR4 AM4 platform. | Check price for AMD Ryzen 7 5700X (opens in a new tab) |
Our Picks
Largest Game Cache1 of 4
AMD Ryzen 9 7900 on Amazon (opens in a new tab)
The Ryzen 9 7900 is the 65W twelve-core AM5 chip with a Wraith Prism cooler included.
Best for
- Players chasing 1% lows in simulation and esports titles.
Skip if
- Price-first buyers should look at the Core i5-14400F, which cost less when we checked.
Why we like it
It trades a little boost clock for lower heat. Its 64MB L3 cache is the largest here; the Ryzen 7 5700X comes next at 32MB. Nothing else here matches its 5.4GHz boost clock; the Core i5-14600KF comes closest at 5.3GHz.
On core count it sits mid-pack at 12 cores: the Core i5-14600KF offers 14 cores, and the Ryzen 7 5700X comes in at 8 cores. On rated power it ties with the Ryzen 7 5700X at 65W. No other pick in this guide offers an AM5 socket; compare the Ryzen 7 5700X, which has an AM4 socket.
It is the only pick here with DDR5 memory; the Core i5-14600KF has DDR4 or DDR5 memory instead. You also get 12 cores at a 65W rating. Only the Core i5-14600KF came close to it on price at the time of writing; it cost the most of the 4 picks.
Key dimensions & specs
- L3 cache: 64MB
- Max boost: 5.4GHz
- Cores / threads: 12 cores
- Rated power: 65W
- Threads: 24
- Socket: AM5
- Memory: DDR5
- Cooler in box: Yes
- Integrated graphics: Yes
Pros
- 64MB of L3 cache
- 12 cores for encoding and background work
- 65W rating suits a modest air cooler
- Wraith Stealth cooler in the box
Cons
- Costs more than the Core i5-14400F at the time of writing
Highest Core Count2 of 4
Intel Core i5-14600KF on Amazon (opens in a new tab)
The Core i5-14600KF is the 14600K without integrated graphics.
Best for
- Buyers who put core count first.
Skip if
- Look at the others if this bothers you: no cooler in the box.
Why we like it
It costs less and needs a graphics card for display output. On L3 cache it sits mid-pack at 24MB: the Ryzen 9 7900 offers 64MB, and the Core i5-14400F comes in at 20MB. On boost clock it sits mid-pack at 5.3GHz: the Ryzen 9 7900 offers 5.4GHz, and the Ryzen 7 5700X comes in at 4.6GHz.
Nothing else here matches its 14 cores core count; the Ryzen 9 7900 comes closest at 12 cores. It matches the Core i5-14400F on rated power (125W). It shares an LGA1700 socket with the Core i5-14400F; the Ryzen 7 5700X goes with an AM4 socket.
It also comes with 6 performance and 8 efficient cores and an unlocked multiplier. On price it sat third of 4, between the cheaper Ryzen 7 5700X and the pricier Ryzen 9 7900, at the time of writing. The main gap: no cooler in box, unlike the Ryzen 9 7900. If that matters, the Ryzen 9 7900 has it.
Key dimensions & specs
- L3 cache: 24MB
- Max boost: 5.3GHz
- Cores / threads: 14 cores
- Rated power: 125W
- Threads: 20
- Socket: LGA1700
- Memory: DDR4 or DDR5
- Cooler in box: No
- Integrated graphics: No
Pros
- 14 cores for encoding and background work
- 6 performance and 8 efficient cores
- Unlocked multiplier
- L3 cache of 24MB, ahead of the Core i5-14400F
Cons
- No cooler in the box
- No integrated graphics, so a graphics card is required
- Costs more than the Core i5-14400F at the time of writing
Lowest Price Here3 of 4
Intel Core i5-14400F on Amazon (opens in a new tab)
The Core i5-14400F is a locked ten-core LGA1700 chip with no integrated graphics.
Best for
- Buyers who would rather put the savings elsewhere in the build.
Skip if
- Pass on it if no cooler in the bo rules it out for your setup.
Why we like it
It pairs well with a B660 or B760 board and DDR4. On L3 cache it trails the group at 20MB, while the Ryzen 9 7900 offers 64MB. On boost clock it sits mid-pack at 4.7GHz: the Ryzen 9 7900 offers 5.4GHz, and the Ryzen 7 5700X comes in at 4.6GHz.
Its 10 cores core count ranks third of 4 here, behind the Core i5-14600KF (14 cores) and ahead of the Ryzen 7 5700X (8 cores). It matches the Core i5-14600KF on rated power (125W). It shares an LGA1700 socket with the Core i5-14600KF; the Ryzen 7 5700X goes with an AM4 socket.
You also get 6 performance and 4 efficient cores, DDR4 and DDR5 support and PCIe 5.0 and 4.0 support. It undercut the Ryzen 7 5700X and every other pick on price at the time of writing.
Key dimensions & specs
- L3 cache: 20MB
- Max boost: 4.7GHz
- Cores / threads: 10 cores
- Rated power: 125W
- Threads: 16
- Socket: LGA1700
- Memory: DDR4 or DDR5
- Cooler in box: No
- Integrated graphics: No
Pros
- 6 performance and 4 efficient cores
- DDR4 and DDR5 support
- PCIe 5.0 and 4.0 support
- Boost clock of 4.7GHz, ahead of the Ryzen 7 5700X
Cons
- No cooler in the box
- No integrated graphics, so a graphics card is required
- L3 cache trails the Ryzen 9 7900 (64MB)
Also Consider4 of 4
AMD Ryzen 7 5700X on Amazon (opens in a new tab)
The Ryzen 7 5700X gives AM4 builds eight cores at a 65W rating.
Best for
- Buyers who want eight cores on the DDR4 AM4 platform.
Skip if
- Worth skipping when aM4 is a final-generation platform with no newer CPUs comin is a problem.
Why we like it
It suits players who also stream or edit on a DDR4 platform. Its 32MB L3 cache ranks second of 4 here, behind the Ryzen 9 7900 (64MB) and ahead of the Core i5-14400F (20MB). Its 4.6GHz boost clock is the lowest in this group; the Ryzen 9 7900 leads at 5.4GHz.
On core count it trails the group at 8 cores, while the Core i5-14600KF offers 14 cores. On rated power it ties with the Ryzen 9 7900 at 65W. No other pick in this guide offers an AM4 socket; compare the Ryzen 9 7900, which has an AM5 socket.
It is the only pick here with DDR4 memory; the Core i5-14600KF has DDR4 or DDR5 memory instead. It also comes with PCIe 4.0 support. It was priced above the Core i5-14400F and below the Core i5-14600KF at the time of writing.
Key dimensions & specs
- L3 cache: 32MB
- Max boost: 4.6GHz
- Cores / threads: 8 cores
- Rated power: 65W
- Threads: 16
- Socket: AM4
- Memory: DDR4
- Cooler in box: No
- Integrated graphics: No
Pros
- 65W rating suits a modest air cooler
- Eight cores on the DDR4 AM4 platform
- PCIe 4.0 support
- L3 cache of 32MB, ahead of the Core i5-14600KF
Cons
- AM4 is a final-generation platform with no newer CPUs coming
- No cooler in the box
- No integrated graphics, so a graphics card is required
How We Chose
Each pick was assessed across 4 criteria weighted for real-world use.
- How these picks were ranked
- We compared four processors on L3 cache, boost clock, core count and rated power, using each maker's published specs. We did not test them in-house.
- The shared baseline
- All 4, from the Ryzen 9 7900 to the Ryzen 7 5700X, state L3 cache, boost clock and core count.
- Who each pick suits
- The Ryzen 9 7900 for the largest L3 cache here (64MB); the Core i5-14600KF for the highest core count here (14 cores); the Core i5-14400F for the cheapest way into this group, below the Ryzen 7 5700X.
- Price range
- At our last check the picks ran from the Core i5-14400F ($150 to $250) to the Ryzen 9 7900 ($250 to $500).
What to Look for in a CPUs for Multitasking
Key buying criteria so you get the right fit the first time.
L3 cache
Here L3 cache runs from 20MB on the Core i5-14400F to 64MB on the Ryzen 9 7900. For less, the Ryzen 7 5700X is the runner-up at 32MB.
How much boost clock you need
Here boost clock runs from 4.6GHz on the Ryzen 7 5700X to 5.4GHz on the Ryzen 9 7900. The Core i5-14600KF comes second for less money.
How much core count you need
Here core count runs from 8 cores on the Ryzen 7 5700X to 14 cores on the Core i5-14600KF. The Core i5-14600KF is the pick for core count.
Memory
The Ryzen 9 7900 lists DDR5; the Core i5-14600KF and the Core i5-14400F list DDR4 or DDR5; the Ryzen 7 5700X lists DDR4. Rule out the mismatches before looking at price.
Cooler in box
The Ryzen 9 7900 has it; the Core i5-14600KF, the Core i5-14400F and the Ryzen 7 5700X go without. Rule out the mismatches before looking at price.
Budget for the cooler
Most unlocked chips ship without a cooler. A 65W part runs well on a basic single tower, while 120W to 170W parts need a dual tower or an AIO to hold their boost clocks.
Add the cooler to the CPU price when comparing.
How to Choose a CPUs for Multitasking
By priority
| Priority | Consider | Why |
|---|---|---|
| Players chasing 1% lows in simulation and esports titles | Ryzen 9 7900 | The largest L3 cache here (64MB) |
| Buyers who put core count first | Core i5-14600KF | The highest core count here (14 cores) |
| Buyers who would rather put the savings elsewhere in the build | Core i5-14400F | The cheapest way into this group, below the Ryzen 7 5700X |
| Buyers who want eight cores on the DDR4 AM4 platform | Ryzen 7 5700X | Eight cores on the DDR4 AM4 platform |
Scroll sideways to see every column.
Key specs side by side
The Ryzen 9 7900 leads on L3 cache at 64MB, ahead of the Ryzen 7 5700X at 32MB.
| Processor | L3 cache | Max boost | Cores / threads | Rated power |
|---|---|---|---|---|
| Ryzen 9 7900 | 64MB | 5.4GHz | 12 cores | 65W |
| Core i5-14600KF | 24MB | 5.3GHz | 14 cores | 125W |
| Core i5-14400F | 20MB | 4.7GHz | 10 cores | 125W |
| Ryzen 7 5700X | 32MB | 4.6GHz | 8 cores | 65W |
Scroll sideways to see every column.
By price at the time of writing
The Core i5-14400F was the lowest-priced pick and the Ryzen 9 7900 the highest when we checked; tiers move with Amazon pricing.
| Price tier | Processors |
|---|---|
| About $150 to $250 | Core i5-14400F, Ryzen 7 5700X, Core i5-14600KF |
| About $250 to $500 | Ryzen 9 7900 |
Frequently Asked Questions
Is the Ryzen 9 7900 ahead of the Ryzen 7 5700X on L3 cache?
The Ryzen 9 7900 leads at 64MB, with the Ryzen 7 5700X at 32MB. The Core i5-14400F is at the other end of this group with 20MB.
Which has the highest boost clock: the Ryzen 9 7900 or the Core i5-14600KF?
The Ryzen 9 7900 leads at 5.4GHz, with the Core i5-14600KF at 5.3GHz. The Ryzen 7 5700X is at the other end of this group with 4.6GHz.
How does the Ryzen 9 7900 compare with the Core i5-14600KF on core count?
The Core i5-14600KF leads at 14 cores, with the Ryzen 9 7900 at 12 cores. The Ryzen 7 5700X is at the other end of this group with 8 cores.
Is the Ryzen 9 7900 worth paying more than the Core i5-14400F?
On paper it adds L3 cache (64MB against 20MB), boost clock (5.4GHz against 4.7GHz) and core count (12 cores against 10 cores). The Core i5-14400F was the lowest-priced pick when we checked, so pay the difference only if those gains matter to you.
What makes the Core i5-14600KF the Highest Core Count?
It earns the label for the highest core count here (14 cores). It suits anyone who put core count first.
Do the Ryzen 9 7900 and the Core i5-14600KF differ on socket?
The Ryzen 9 7900 uses AM5; the Core i5-14600KF and the Core i5-14400F use LGA1700; the Ryzen 7 5700X uses AM4.
Bottom Line
Our first pick is the Ryzen 9 7900. Look at the Core i5-14600KF for the highest core count here (14 cores), the Core i5-14400F for the cheapest way into this group, below the Ryzen 7 5700X and the Ryzen 7 5700X for eight cores on the DDR4 AM4 platform if those matter more to you.
32GB of RAM matters as much as the CPU for multitasking.