CPU Comparison
Intel Xeon 638 Processor vs Intel Xeon 676X
A side-by-side comparison of specs, performance and value. The Intel Xeon 638 is a 16-core, 32-thread workstation and server processor in Intel’s Xeon 600 Granite Rapids-WS family, built on the Intel 3 process with Redwood Cove P-cores, 72 MB of L3 cache, and 80 PCIe 5.0 lanes. It targets professional workloads like 3D rendering, simulation, and AI inference where high single-thread clocks and decent multi-thread density matter more than maximum core count.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Gaming
Virtualization
Efficiency
Specialized Performance
AI / ML
- AMX with FP16/BF16/INT8 acceleration
- FP16 native support reduces overhead vs prior Xeon generations
- Still limited compared to dedicated AI accelerators or high-end GPUs for large models
- Intel AMX with FP16/BF16/INT8 accelerates inference and light training
- Not a replacement for dedicated GPUs or accelerators on large models
- Well suited for AI development, prototyping, and CPU-bound inference
Content Creation
Gaming
- No integrated graphics
- Not validated for gaming workloads by Intel
- Gaming performance will depend heavily on GPU and platform tuning
- High single-core boost up to 4.9 GHz helps keep frame rates smooth
- Not targeted at gamers; few games scale well beyond 16–24 threads
- Better suited as a gaming streaming + workstation hybrid than a pure gaming CPU
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 16 high-IPC Redwood Cove cores with 4.8 GHz turbo
- 80 PCIe 5.0 lanes for multi-GPU and fast storage
- Quad-channel DDR5-6400 with ECC and MRDIMM support
- AMX with FP16 for improved AI inference performance
- Unlocked multiplier for overclocking on supported platforms
- Modern Intel 3 process improves performance per watt vs older Xeons
Cons
- Only four memory channels versus eight on higher Xeon 600 SKUs
- 180 W TDP and 216 W max turbo can stress compact cooling solutions
- No integrated graphics, requiring a discrete GPU
- Higher platform cost than mainstream desktop CPUs
- Workstation pricing may not justify upgrades for users with existing Sapphire Rapids-WS systems
Pros
- 32 P-cores and 64 threads for heavily parallel workloads
- 128 PCIe 5.0 lanes for multi-GPU and storage configurations
- 8-channel DDR5/MRDIMM with up to 4 TB capacity
- Intel AMX with FP16 for improved AI inference
- Unlocked multiplier for overclocking on X-series SKUs
- Strong virtualization and security feature set (vPro, VT-x, VT-d, TME, CET)
Cons
- High power draw (275 W base, up to 330 W turbo)
- Expensive CPU and platform (W890 board, DDR5/MRDIMM)
- Overkill and inefficient for gaming or light tasks
- No integrated graphics, requires discrete GPU
- New platform; early firmware and BIOS maturity may vary
Competitors & Alternatives
Intel Xeon 638 Processor
- AMD Ryzen Threadripper PRO 7965WXRival
Workstation
- AMD EPYC 4465PRival
Server / Workstation
- Intel Xeon W5-3435XRival
Workstation
- Intel Xeon 656Rival
Workstation
- AMD Ryzen Threadripper PRO 7995WXRival
Workstation
- Intel Xeon 654Alt
18 cores and 8-channel DDR5 if you need more memory bandwidth and cores, at higher TDP and price.
- Intel Xeon 636Alt
12-core, lower-power alternative if you don’t need 16 cores and want to save on licensing and cooling.
Intel Xeon 676X
- AMD Ryzen Threadripper 9000 WX-SeriesRival
Workstation
- AMD Ryzen Threadripper PRO 9000 WX-SeriesRival
Workstation
- AMD EPYC 9004 (Single-Socket Workstation)Rival
Server / Workstation
- Intel Xeon W-3500 Series (Sapphire Rapids-WS)Rival
Workstation
- Intel Xeon W-2500 Series (Emerald Rapids-WS)Rival
Workstation
Same platform with 28 cores and slightly lower TDP if you don’t need 32 cores.
Compare head-to-head- Intel Xeon 658XAlt
Fewer cores (24) but still full 144 MB L3 and 128 PCIe lanes at lower power.
- AMD Ryzen Threadripper 9980XAlt
Higher multi-threaded performance in many workloads, but different platform and memory ecosystem.
- AMD Ryzen Threadripper PRO 9985WXAlt
More cores and PCIe lanes for bigger workstations, at higher cost and power.
- Intel Core Ultra 9 285KAlt
Better fit if you mainly game and do light content creation, with much lower platform cost.
Our Verdict on Each
A strong mid-range workstation CPU with excellent IPC, modern I/O, and AMX-based AI acceleration, best suited for professionals who need more than desktop cores but don’t require 60+ core monsters.
Best for: Professional workstation or small server needing 16–32 threads, strong per-core performance, and lots of PCIe 5.0 connectivity, but not extreme core counts or eight-channel memory.
Read the full reviewA powerful 32-core Granite Rapids-WS workstation CPU with excellent I/O, memory capacity, and AI acceleration, best suited for professional workloads where core count, PCIe lanes, and memory bandwidth matter more than raw gaming performance.
Best for: Professional workstation for rendering, simulation, AI development, or data analytics where you need 32+ cores, 128 PCIe lanes, and 8-channel memory.
Read the full reviewFrequently Asked Questions
Which is better, Intel Xeon 638 Processor or Intel Xeon 676X?
Based on our editorial ratings, the Intel Xeon 676X comes out ahead with a score of 8.7/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which is faster for gaming, Intel Xeon 638 Processor or Intel Xeon 676X?
For gaming, the Intel Xeon 676X leads with a gaming performance score of 65/100 among Intel Xeon 638 Processor and Intel Xeon 676X.
Which uses less power?
The Intel Xeon 638 Processor has the lowest rated TDP. Power draw across these chips: Intel Xeon 638 Processor (180 W), Intel Xeon 676X (275 W).
Do Intel Xeon 638 Processor and Intel Xeon 676X use the same socket?
Yes — all of these CPUs use the FCLGA4710 socket, so they share compatible motherboards.
Which has more cores?
The Intel Xeon 676X has the most cores. Core counts: Intel Xeon 638 Processor (16 cores), Intel Xeon 676X (32 cores).