Core Ultra 5 245K vs Ryzen 7 9800X3D

Two processors from Intel and AMD, targeting different sides of the multi-core performance and single-thread speed spectrum. The biggest difference comes down to cache.

Best Performance
Ryzen 7 9800X3D
Highest Geekbench 6 multi-core score
Best Benchmark Value
Core Ultra 5 245K
Geekbench 6 multi-core score per dollar at $288.99
Core Ultra 5 245K

Intel

Core Ultra 5 245K
$288.99

14-core Arrow Lake processor (6P + 8E) with 5.2 GHz boost. Great value for mid-range gaming builds on Intel's latest platform.

Ryzen 7 9800X3D

AMD

Ryzen 7 9800X3D
$479.99

The ultimate gaming CPU with 2nd-gen 3D V-Cache technology. 8 cores with 104MB of total cache delivering unmatched gaming frame rates across all titles.

How They Compare

Core Ultra 5 245K

The Intel Core Ultra 5 245K is priced at $288.99 in the CPUs category. It stands out with cores advantages over the competition. It's designed with gaming in mind.

Ryzen 7 9800X3D

The AMD Ryzen 7 9800X3D is priced at $479.99 in the CPUs category. It stands out with tdp, cache, threads advantages over the competition. It's designed with gaming in mind.

Key Differences

TDP
Core Ultra 5 245K:125W (PL2 159W)
Ryzen 7 9800X3D:120W

What this means: TDP indicates cooling requirements and power draw. A 65W CPU works with basic air coolers, while 125W+ may need a high-end tower cooler or AIO liquid. Higher TDP chips often perform better but generate more heat and need better airflow.

Cache
Core Ultra 5 245K:26MB
Ryzen 7 9800X3D:104MB

What this means: CPU cache (L2 and L3) acts as ultra-fast memory close to the cores. Larger caches reduce trips to system RAM, cutting latency. Games benefit heavily from large L3 caches - AMD's X3D chips with stacked V-Cache demonstrate up to 20% gaming FPS gains from cache alone.

Cores
Core Ultra 5 245K:14
Ryzen 7 9800X3D:8

What this means: More cores handle multi-threaded workloads like video editing, 3D rendering, streaming while gaming, and running VMs. Most games plateau at 6-8 cores - extra cores rarely help gaming FPS but matter enormously for productivity. 4 cores is entry-level, 6-8 is the gaming sweet spot, 12+ is for heavy multitasking.

Socket
Core Ultra 5 245K:LGA 1851
Ryzen 7 9800X3D:AM5

What this means: The CPU socket must match your motherboard exactly - AM5 for AMD Ryzen 7000/9000, LGA 1851 for Intel Arrow Lake. This locks you into a platform: AMD AM5 supports multiple CPU generations, Intel sockets typically support one or two.

Threads
Core Ultra 5 245K:14
Ryzen 7 9800X3D:16

What this means: Simultaneous multithreading (SMT/Hyper-Threading) doubles the tasks each core can juggle. A 6-core/12-thread CPU handles background apps, Discord, and streaming alongside gaming much better than a 6-core/6-thread chip. Less impact in pure gaming where few threads are used.

Base Clock
Core Ultra 5 245K:4.2 GHz
Ryzen 7 9800X3D:4.7 GHz

What this means: The guaranteed minimum clock speed under sustained full load. Higher base clocks provide more consistent performance during long rendering jobs or extended gaming sessions when boost clocks can't be maintained due to thermal limits.

Architecture
Core Ultra 5 245K:Arrow Lake
Ryzen 7 9800X3D:Zen 5 (3D V-Cache)

What this means: CPU architecture determines IPC (instructions per clock) - how much work gets done per MHz. Newer architectures are significantly faster at the same clock speed, and also bring feature support like AVX-512 and improved power efficiency. Zen 5 and Arrow Lake both deliver meaningful IPC gains over their predecessors.

Spec Breakdown

Core Ultra 5 245K
Ryzen 7 9800X3D
Cores
Core Ultra 5 2...
14
Ryzen 7 9800X3...
8
Threads
Core Ultra 5 2...
14
Ryzen 7 9800X3...
16
Base Clock
Core Ultra 5 2...
4.2 GHz
Ryzen 7 9800X3...
4.7 GHz
Boost Clock
Core Ultra 5 2...
5.2 GHz
Ryzen 7 9800X3...
5.2 GHz

Geekbench 6 Benchmark Scores

Source: Geekbench Browser
Core Ultra 5 245K
Ryzen 7 9800X3D
Multi-Core Score
Core Ultra 5 245K
15,945
Ryzen 7 9800X3D
18,334
Multi-Core leader:Ryzen 7 9800X3D (18,334)

Full Specification Comparison

9 specs
SpecificationCore Ultra 5 245KRyzen 7 9800X3D
TDP125W (PL2 159W)120W
Cache26MB104MB
Cores148
SocketLGA 1851AM5
Threads1416
Base Clock4.2 GHz4.7 GHz
Boost Clock5.2 GHz5.2 GHz
ArchitectureArrow LakeZen 5 (3D V-Cache)
Included CoolerNoNo

The Bottom Line

Best Benchmark Value

At $288.99, the Core Ultra 5 245K is the most affordable option. It takes the lead in cores. Tagged as Best Benchmark Value.

Strengths
  • More cores (14)
Tradeoffs
  • Higher power draw (125W (PL2 159W)W)
  • Lower cache (26MB)
  • Fewer threads (14)
Buy this if
  • You need 14+ cores for your workload
  • Budget is your top priority
  • You want the best benchmark score per dollar
Skip this if
  • You want lower power draw than 125W (PL2 159W)W
  • You need better cache
Value-conscious buildersMulti-threaded workloads
Best PerformancePremium PickMost Efficient

At $479.99, the Ryzen 7 9800X3D is the premium option. It takes the lead in tdp and cache. Tagged as Best Performance and Premium Pick and Most Efficient.

Strengths
  • Lower power draw (120W)
  • Better cache (104MB)
  • More threads (16)
  • Higher base clock (4.7 GHz) within comparable designs
Tradeoffs
  • Fewer cores (8)
Buy this if
  • You want a cooler, more power-efficient build
  • You want the stronger cache
  • Power efficiency matters for your build
Skip this if
  • You need more cores for multi-threaded workloads
Maximum performance seekersEnthusiast buildsPower-efficient builds

Frequently Asked Questions

Core Ultra 5 245K vs Ryzen 7 9800X3D Comparison | PCPARTGUIDE