CPU Comparison
Core i7-3930K vs Core i7-3970X
A side-by-side comparison of specs, performance and value. The Intel Core i7-3930K is a flagship high-end desktop (HEDT) processor from the Sandy Bridge-E generation. Released in late 2011, it features 6 cores and 12 threads, operating at a base clock of 3.2 GHz and boosting up to 3.8 GHz. Built on a 32nm process, it boasts a massive 12MB L3 cache and a 130W TDP. As an unlocked 'K' series processor, it is highly prized by overclockers. It uses the LGA 2011 socket and supports quad-channel DDR3 memory along with 40 PCIe 3.0 lanes, making it ideal for multi-GPU setups and high-bandwidth applications. The chip lacks integrated graphics, requiring a discrete GPU. Though superseded by newer architectures, the i7-3930K remains a legendary CPU, offering robust multi-threaded performance that can still handle modern workloads reasonably well on the X79 platform.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
6 cores and 12 threads hold up well for content creation.
Clock speed advantage over 3960X helps slightly, but still far behind modern CPUs.
Gaming
Still decent for modern gaming, though single-core is slower than new CPUs.
Can still play older or light eSports titles, but bottlenecks modern high-refresh gaming.
Virtualization
Excellent for VMs with 12 threads and quad-channel memory.
Adequate for basic VMs on X79, but lacks modern I/O virtualization enhancements.
Efficiency
130W TDP and 32nm process mean it runs hot and uses power.
150W TDP for 6 cores is highly inefficient by modern standards.
Specialized Performance
AI / ML
- No AI hardware
- PCIe 3.0 is okay for basic inference cards
- No modern AI acceleration
- Lacks AVX2/AVX-512 necessary for efficient inference
Content Creation
Gaming
- 6 cores help with modern titles
- Overclocks well to improve single-core
- PCIe 3.0 supports modern GPUs
- Lacks AVX2
- Low IPC compared to modern architectures
- Still viable for 60fps gaming in older titles
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 6 cores and 12 threads
- 40 PCIe 3.0 lanes
- Massive 12MB L3 cache
- Excellent overclocker
Cons
- High 130W TDP
- 32nm process is inefficient
- No integrated graphics
- Obsolete X79 platform
Pros
- Incredible clock speeds for a 32nm CPU in 2012
- Fully unlocked for overclocking
- 40 PCIe 3.0 lanes
- Strong multi-threaded performance for its era
Cons
- Extremely high 150W TDP
- Minimal upgrade over the 3960X
- Lacks AVX2 support
- Obsolete platform (X79/DDR3)
Competitors & Alternatives
Core i7-3930K
- AMD FX-8150Rival
Desktop
- Intel Core i7-3960XRival
HEDT
- Intel Core i7-3910KRival
HEDT
- AMD FX-8350Rival
Desktop
- Compare head-to-headIntel Core i7-2700KRival
Desktop
- Intel Core i7-4930KAlt
Ivy Bridge-E successor with slightly better performance.
Haswell-E successor with DDR4 support.
Compare head-to-headHaswell-E with 40 PCIe lanes and DDR4.
Compare head-to-headBroadwell-E successor with better efficiency.
Compare head-to-head
Core i7-3970X
- Intel Core i7-3960XRival
HEDT
- Intel Core i7-3930KRival
HEDT
- AMD FX-8350Rival
Enthusiast Desktop
- Intel Xeon E5-1660Rival
Workstation
- Compare head-to-headIntel Core i7-3770KRival
High-End Desktop
Modern budget CPU that vastly outperforms it in every metric.
Compare head-to-head- AMD Ryzen 5 7600Alt
Offers modern platform features, DDR5, and excellent efficiency.
- Intel Core i7-4960XAlt
The direct Ivy Bridge-E successor if stuck on X79.
- Intel Xeon E5-2680 v2Alt
Cheap used X79 upgrade with more cores for workstation tasks.
- AMD Ryzen 7 5700XAlt
Highly efficient 8-core CPU that destroys this legacy chip.
Our Verdict on Each
A legendary HEDT CPU that brought 6 cores to the masses. Still capable for budget workstations today.
Best for: Budget 6-core workstation build
Read the full reviewA speed-bumped flagship that maximized the Sandy Bridge-E architecture's potential, though heavily outdated by modern efficiency and IPC standards.
Best for: Upgrading an existing X79 system on the cheap
Read the full reviewFrequently Asked Questions
Which is better, Core i7-3930K or Core i7-3970X?
Based on our editorial ratings, the Core i7-3930K comes out ahead with a score of 8.2/10. 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, Core i7-3930K or Core i7-3970X?
For gaming, the Core i7-3930K leads with a gaming performance score of 60/100 among Core i7-3930K and Core i7-3970X.
Which uses less power?
The Core i7-3930K has the lowest rated TDP. Power draw across these chips: Core i7-3930K (130 W), Core i7-3970X (150 W).
Do Core i7-3930K and Core i7-3970X use the same socket?
Yes — all of these CPUs use the LGA 2011 socket, so they share compatible motherboards.
Which is faster in multi-core benchmarks?
The Core i7-3930K posts the highest multi-core benchmark score. Multi-core results: Core i7-3930K (13,000), Core i7-3970X (9,500). Benchmark figures are approximate and workload-dependent.