Buying Guide
The Best CPUs for the RTX 4070
Six processors that pair with an RTX 4070 at 1440p and 1080p, compared on cache, cores, platform and price.
By The PC Journal editorial team
12 min read6 products evaluated
The RTX 4070 is a 1440p card, so it rarely needs a flagship CPU. What it needs is a chip that does not hold it back in CPU-heavy games.
We compared six processors on cache, cores and platform cost, using manufacturer specifications.
Quick Picks
Our 6 recommendations at a glance. Tap a pick for the full verdict.
Best Match for an RTX 4070
AMD Ryzen 5 7600X3D
96MB of L3 on a six-core AM5 chip.
Best for: 1440p builds around a 4070.
Our take Check price for AMD Ryzen 5 7600X3D (opens in a new tab)
Best for High Refresh
AMD Ryzen 7 7800X3D
Eight cores with 96MB of L3.
Best for: 4070 owners with 1080p 240Hz monitors.
Our take Check price for AMD Ryzen 7 7800X3D (opens in a new tab)
Best Zen 5 Pick
AMD Ryzen 5 9600X
Six Zen 5 cores at 65W.
Best for: New AM5 builds.
Our take Check price for AMD Ryzen 5 9600X (opens in a new tab)
Best Intel Pairing
Intel Core i5-14600KF
Fourteen cores with DDR4 support.
Best for: Intel builds reusing DDR4.
Our take Check price for Intel Core i5-14600KF (opens in a new tab)
Best Budget Pairing
AMD Ryzen 5 7600
A bundled cooler.
Best for: Keeping total cost down.
Our take Check price for AMD Ryzen 5 7600 (opens in a new tab)
Best AM4 Pairing
AMD Ryzen 7 5800X3D
96MB of L3 on AM4.
Best for: Older AM4 PCs getting a 4070.
Our take Check price for AMD Ryzen 7 5800X3D (opens in a new tab)
| Pick | Why it’s here | Best for | Price |
|---|---|---|---|
| 96MB of L3 on a six-core AM5 chip. | 1440p builds around a 4070. | Check price for AMD Ryzen 5 7600X3D (opens in a new tab) |
| Eight cores with 96MB of L3. | 4070 owners with 1080p 240Hz monitors. | Check price for AMD Ryzen 7 7800X3D (opens in a new tab) |
| Six Zen 5 cores at 65W. | New AM5 builds. | Check price for AMD Ryzen 5 9600X (opens in a new tab) |
| Fourteen cores with DDR4 support. | Intel builds reusing DDR4. | Check price for Intel Core i5-14600KF (opens in a new tab) |
| A bundled cooler. | Keeping total cost down. | Check price for AMD Ryzen 5 7600 (opens in a new tab) |
| 96MB of L3 on AM4. | Older AM4 PCs getting a 4070. | Check price for AMD Ryzen 7 5800X3D (opens in a new tab) |
Our Picks
Best Match for an RTX 40701 of 6
AMD Ryzen 5 7600X3D on Amazon (opens in a new tab)
The Ryzen 5 7600X3D brings 96MB of L3 cache to a six-core AM5 chip at a 65W rating.
Best for
- 1440p builds around a 4070.
Skip if
- Skip it if this is a deal-breaker for you: 6 cores leave less headroom for streaming alongside games.
Why we like it
It is the cheapest way into AMD's cache-heavy gaming line on AM5. It matches the Ryzen 7 7800X3D and the Ryzen 7 5800X3D on L3 cache (96MB). Its 4.7GHz boost clock ranks fifth of 6 here, behind the Ryzen 5 9600X (5.4GHz) and ahead of the Ryzen 7 5800X3D (4.5GHz).
On core count it ties with the Ryzen 5 9600X and the Ryzen 5 7600 at 6 cores. It needs an AM5 board (A620, B650, B850, X670 or X870 series) and DDR5 memory; check the board's CPU support list for the minimum BIOS version. No cooler is included; a single-tower air cooler is enough at its rating.
It was priced above the Core i5-14600KF and below the Ryzen 7 7800X3D at the time of writing. What it gives up: no cooler in box, unlike the Ryzen 5 7600; by contrast, the Ryzen 5 7600 has it.
Key dimensions & specs
- L3 cache: 96MB
- Max boost: 4.7GHz
- Cores / threads: 6 cores
- Rated power: 65W
- Threads: 12
- Socket: AM5
- Memory: DDR5
- Cooler in box: No
- Integrated graphics: Yes
Pros
- 96MB of L3 cache from 3D V-Cache
- 65W rating suits a modest air cooler
- Integrated graphics for display output without a graphics card
- 96MB of L3 cache on a six-core chip
Cons
- 6 cores leave less headroom for streaming alongside games
- No cooler in the box
- Costs more than the Ryzen 5 9600X at the time of writing
Best for High Refresh2 of 6
AMD Ryzen 7 7800X3D on Amazon (opens in a new tab)
The Ryzen 7 7800X3D was the first eight-core AM5 chip with 3D V-Cache.
Best for
- 4070 owners with 1080p 240Hz monitors.
Skip if
- Worth skipping when no cooler in the bo is a problem.
Why we like it
It carries the same 96MB of L3 as the 9800X3D at a lower boost clock and a lower price. Its 5GHz boost clock ranks fourth of 6 here, behind the Ryzen 5 9600X (5.4GHz) and ahead of the Ryzen 7 5800X3D (4.5GHz). On core count it ties with the Ryzen 7 5800X3D at 8 cores.
On rated power it sits mid-pack at 120W: the Ryzen 5 7600X3D offers 65W, and the Core i5-14600KF comes in at 125W. You also get the Zen 4 architecture. It needs an AM5 board (A620, B650, B850, X670 or X870 series) and DDR5 memory; check the board's CPU support list for the minimum BIOS version.
It was priced above the Ryzen 5 7600X3D and below the Ryzen 7 5800X3D at the time of writing. What it gives up: no cooler in box, unlike the Ryzen 5 7600; by contrast, the Ryzen 5 7600 has it.
Key dimensions & specs
- L3 cache: 96MB
- Max boost: 5GHz
- Cores / threads: 8 cores
- Rated power: 120W
- Threads: 16
- Socket: AM5
- Memory: DDR5
- Cooler in box: No
- Integrated graphics: Yes
Pros
- 96MB of L3 cache from 3D V-Cache
- Integrated graphics for display output without a graphics card
- First-generation AM5 3D V-Cache
- The Zen 4 architecture
Cons
- No cooler in the box
- Costs more than the Ryzen 5 9600X at the time of writing
Best Zen 5 Pick3 of 6
AMD Ryzen 5 9600X on Amazon (opens in a new tab)
The Ryzen 5 9600X brings Zen 5 to six cores at a 65W rating.
Best for
- New AM5 builds.
Skip if
- Look at the others if this bothers you: 6 cores leave less headroom for streaming alongside games.
Why we like it
It is AMD's current entry point for AM5 builds that plan a later CPU upgrade. On L3 cache it ties with the Ryzen 5 7600 at 32MB. Nothing else here matches its 5.4GHz boost clock; the Core i5-14600KF comes closest at 5.3GHz.
It matches the Ryzen 5 7600X3D and the Ryzen 5 7600 on core count (6 cores). It needs an AM5 board (A620, B650, B850, X670 or X870 series) and DDR5 memory; a 600-series board may need a BIOS update first, so check the maker's CPU support list for the minimum version. No cooler is included; a single-tower air cooler is enough at its rating.
It undercut the Ryzen 5 7600 and every other pick on price at the time of writing. The main gap: no cooler in box, unlike the Ryzen 5 7600. If that matters, the Ryzen 5 7600 has it.
Key dimensions & specs
- L3 cache: 32MB
- Max boost: 5.4GHz
- Cores / threads: 6 cores
- Rated power: 65W
- Threads: 12
- Socket: AM5
- Memory: DDR5
- Cooler in box: No
- Integrated graphics: Yes
Pros
- 65W rating suits a modest air cooler
- Integrated graphics for display output without a graphics card
- The Zen 5 architecture
- L3 cache of 32MB, ahead of the Core i5-14600KF
Cons
- 6 cores leave less headroom for streaming alongside games
- No cooler in the box
Best Intel Pairing4 of 6
Intel Core i5-14600KF on Amazon (opens in a new tab)
The Core i5-14600KF is the 14600K without integrated graphics.
Best for
- Intel builds reusing DDR4.
Skip if
- Pass on it if no cooler in the bo rules it out for your setup.
Why we like it
It costs less and needs a graphics card for display output. On L3 cache it trails the group at 24MB, while the Ryzen 5 7600X3D offers 96MB. On boost clock it sits mid-pack at 5.3GHz: the Ryzen 5 9600X offers 5.4GHz, and the Ryzen 7 5800X3D comes in at 4.5GHz.
Nothing else here matches its 14 cores core count; the Ryzen 7 7800X3D comes closest at 8 cores. Its 125W rated power is the highest in this group; the Ryzen 5 7600X3D leads at 65W. You get an LGA1700 socket here, which sets it apart from the Ryzen 7 5800X3D and its an AM4 socket.
DDR4 or DDR5 memory is unique to it among these picks, while the Ryzen 5 7600 uses DDR5 memory. It also offers 6 performance and 8 efficient cores and an unlocked multiplier. Its price falls between the Ryzen 5 7600 and the Ryzen 5 7600X3D, based on our last check.
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
- Boost clock of 5.3GHz, ahead of the Ryzen 5 7600
Cons
- No cooler in the box
- No integrated graphics, so a graphics card is required
- L3 cache trails the Ryzen 5 7600X3D (96MB)
Best Budget Pairing5 of 6
AMD Ryzen 5 7600 on Amazon (opens in a new tab)
The Ryzen 5 7600 is the six-core AM5 chip with a Wraith Stealth cooler included.
Best for
- Keeping total cost down.
Skip if
- Worth skipping when 6 cores leave less headroom for streaming alongside game is a problem.
Why we like it
The cooler saves money on a first AM5 build. On L3 cache it ties with the Ryzen 5 9600X at 32MB. On boost clock it sits mid-pack at 5.1GHz: the Ryzen 5 9600X offers 5.4GHz, and the Ryzen 7 5800X3D comes in at 4.5GHz.
It matches the Ryzen 5 7600X3D and the Ryzen 5 9600X on core count (6 cores). It also offers the Zen 4 architecture, a 5nm process and PCIe 5.0 support on AM5. It needs an AM5 board (A620, B650, B850, X670 or X870 series) and DDR5 memory; check the board's CPU support list for the minimum BIOS version.
On price it sat second of 6, between the cheaper Ryzen 5 9600X and the pricier Core i5-14600KF, at the time of writing. The trade-off is core count; for more, the Core i5-14600KF offers 14 cores.
Key dimensions & specs
- L3 cache: 32MB
- Max boost: 5.1GHz
- Cores / threads: 6 cores
- Rated power: 65W
- Threads: 12
- Socket: AM5
- Memory: DDR5
- Cooler in box: Yes
- Integrated graphics: Yes
Pros
- 65W rating suits a modest air cooler
- Wraith Stealth cooler in the box
- Integrated graphics for display output without a graphics card
- The Zen 4 architecture
Cons
- 6 cores leave less headroom for streaming alongside games
- Core count trails the Core i5-14600KF (14 cores)
- Costs more than the Ryzen 5 9600X at the time of writing
Best AM4 Pairing6 of 6
AMD Ryzen 7 5800X3D on Amazon (opens in a new tab)
The Ryzen 7 5800X3D is the last X3D chip for AM4.
Best for
- Older AM4 PCs getting a 4070.
Skip if
- Choose another pick if you can't accept this: aM4 is a final-generation platform with no newer CPUs coming.
Why we like it
It lets an existing AM4 board take a cache upgrade without a new platform or DDR5. It matches the Ryzen 5 7600X3D and the Ryzen 7 7800X3D on L3 cache (96MB). Its 4.5GHz boost clock is the lowest in this group; the Ryzen 5 9600X leads at 5.4GHz.
On core count it ties with the Ryzen 7 7800X3D at 8 cores. On rated power it sits mid-pack at 105W: the Ryzen 5 7600X3D offers 65W, and the Core i5-14600KF comes in at 125W. It is the only pick here with an AM4 socket; the Core i5-14600KF has an LGA1700 socket instead.
No other pick in this guide offers DDR4 memory; compare the Ryzen 7 7800X3D, which has DDR5 memory. It also offers a drop-in upgrade for many existing AM4 boards after a BIOS update. At our last price check it topped the group, with the Ryzen 7 7800X3D the nearest cheaper option.
Key dimensions & specs
- L3 cache: 96MB
- Max boost: 4.5GHz
- Cores / threads: 8 cores
- Rated power: 105W
- Threads: 16
- Socket: AM4
- Memory: DDR4
- Cooler in box: No
- Integrated graphics: No
Pros
- 96MB of L3 cache from 3D V-Cache
- 3D V-Cache on the AM4 platform
- Drop-in upgrade for many existing AM4 boards after a BIOS update
- Core count of 8 cores, ahead of the Ryzen 5 7600X3D
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.
- Game-relevant specs
- We compared L3 cache, boost clocks and core counts from AMD's and Intel's product pages.
- Upgrade path
- We considered how long each socket is likely to receive new CPUs.
- Platform cost
- We noted socket, memory type and whether a cooler is included, since they change the real price.
- Power and cooling
- We recorded each chip's rated power and what cooler class it needs.
What to Look for in a CPUs for RTX 4070
Key buying criteria so you get the right fit the first time.
Match the CPU to your graphics card and monitor
At 1440p and 4K the graphics card sets most frame rates, so a mid-range CPU is often enough. At 1080p with a high-refresh monitor, the CPU matters much more.
Spend on the part that limits your games, not on the bigger number.
Cache helps games more than clocks
AMD's X3D chips add a large stacked L3 cache that keeps more game data close to the cores. In CPU-limited games that often helps more than a higher boost clock.
The gain shrinks when the graphics card is the limit.
Check BIOS support before buying
Newer CPUs on older boards may need a BIOS update before the system will start. Check the board's CPU support list for the version you need and whether the board can flash without a CPU installed.
Integrated graphics are a useful backup
Chips with integrated graphics can drive a display without a graphics card, which helps when troubleshooting or between upgrades. Intel's F and KF models and most AM4 Ryzen chips have none.
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.
The socket decides your upgrade path
The socket fixes which motherboards and future CPUs you can use. AM5 has had several CPU generations; AM4 has no newer chips coming.
If you plan to upgrade later, a current platform is worth a small premium.
How to Choose a CPUs for RTX 4070
By priority
| Priority | Consider | Why |
|---|---|---|
| 1440p builds around a 4070 | Ryzen 5 7600X3D | 96MB of L3 on a six-core AM5 chip |
| 4070 owners with 1080p 240Hz monitors | Ryzen 7 7800X3D | Eight cores with 96MB of L3 |
| New AM5 builds | Ryzen 5 9600X | Six Zen 5 cores at 65W |
| Intel builds reusing DDR4 | Core i5-14600KF | Fourteen cores with DDR4 support |
| Keeping total cost down | Ryzen 5 7600 | A bundled cooler |
| Older AM4 PCs getting a 4070 | Ryzen 7 5800X3D | 96MB of L3 on AM4 |
Scroll sideways to see every column.
Key specs side by side
Figures as each maker states them.
| Processor | L3 cache | Max boost | Cores / threads | Rated power |
|---|---|---|---|---|
| Ryzen 5 7600X3D | 96MB | 4.7GHz | 6 cores | 65W |
| Ryzen 7 7800X3D | 96MB | 5GHz | 8 cores | 120W |
| Ryzen 5 9600X | 32MB | 5.4GHz | 6 cores | 65W |
| Core i5-14600KF | 24MB | 5.3GHz | 14 cores | 125W |
| Ryzen 5 7600 | 32MB | 5.1GHz | 6 cores | 65W |
| Ryzen 7 5800X3D | 96MB | 4.5GHz | 8 cores | 105W |
Scroll sideways to see every column.
By price at the time of writing
Prices change often; these tiers reflect Amazon prices when this guide was updated.
| Price tier | Processors |
|---|---|
| About $150 to $250 | Ryzen 5 9600X, Ryzen 5 7600, Core i5-14600KF, Ryzen 5 7600X3D |
| About $250 to $500 | Ryzen 7 7800X3D, Ryzen 7 5800X3D |
Frequently Asked Questions
What does X3D mean on a Ryzen CPU?
It marks AMD's 3D V-Cache chips, which stack extra L3 cache on the processor. Games that are limited by the CPU tend to run faster on them.
What does the rated power figure mean?
It is AMD's default TDP or Intel's base power. Chips can draw more under boost, so size the cooler for sustained loads, not the label alone.
Will a new CPU work in my current motherboard?
Only if the socket matches and the board's BIOS supports it. Check the maker's CPU support list for the minimum BIOS version.
Do I need to buy a separate cooler?
Usually yes. Only some chips, such as the Ryzen 5 7600 and 5600X, include a basic cooler; unlocked high-end models do not.
Should I choose Intel or AMD for gaming?
At the high end, AMD's X3D chips lead in many CPU-limited games. Intel's Core Ultra chips offer more cores for work at similar prices. Choose by workload and platform cost.
What memory should I pair with it?
AM5 and LGA1851 use DDR5; AM4 uses DDR4. For AM5, a 32GB DDR5-6000 kit is a common pairing; check the board's memory support list.
Bottom Line
The Ryzen 5 7600X3D is the closest match for an RTX 4070 on AM5. Step up to the 7800X3D for high-refresh 1080p, pick the i5-14600KF on Intel, and use the 5800X3D to refresh an AM4 PC.