CPU Comparison
Intel Core i7-6800K vs Intel Core i7-990X
A side-by-side comparison of specs, performance and value. The Intel Core i7-6800K is a high-end desktop (HEDT) processor built on the Broadwell-E architecture. Designed for enthusiasts and professionals, it features six cores and twelve threads, offering a significant multi-threaded performance leap over mainstream quad-core CPUs of its era. Operating at a base frequency of 3.4 GHz and boosting up to 3.8 GHz with Intel Turbo Boost Max 3.0, it delivers robust computing power for demanding applications. Unlike mainstream chips, it utilizes the LGA 2011-v3 socket and the X99 chipset, supporting quad-channel DDR4 memory for massive memory bandwidth. With 28 PCIe 3.0 lanes, it provides extensive expansion capabilities for multi-GPU setups and high-speed storage arrays. The 140-watt TDP reflects its workstation-class design. While it lacks integrated graphics, requiring a discrete GPU, the 6800K excels in parallel processing tasks like video editing, 3D rendering, and virtualization, making it a powerhouse for creators who need more than standard desktop platforms offer.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
6 cores handle rendering well, but lack the speed of modern architectures.
Capable for basic legacy tasks, but severely outpaced by modern hardware.
Gaming
Good for gaming, but single-core speed lags behind modern CPUs.
Slightly better than the 980X due to clocks, but still bottlenecks modern games.
Virtualization
Quad-channel memory and 12 threads make it great for VMs.
12 threads are still somewhat useful for basic VM labs.
Efficiency
140W TDP is power-hungry by modern standards.
130W TDP remains highly inefficient compared to modern nodes.
Specialized Performance
AI / ML
- No AI hardware
- CPU inference is moderate due to core count
- No modern AI acceleration
- Too slow for modern inference
Content Creation
Gaming
- Can handle modern games with a discrete GPU
- Lower single-core speed limits high-refresh gaming
- Great for multi-tasking while gaming
- Low IPC
- Lacks AVX2
- Bottlenecks modern GPUs
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- 6 cores / 12 threads
- 28 PCIe lanes
- Quad-channel memory
- Unlocked for overclocking
Cons
- High 140W TDP
- Older 14nm process
- Only 28 PCIe lanes
- Lacks integrated graphics
Pros
- Highest clock speeds for LGA 1366
- Unlocked multiplier
- 6 cores and 12 threads
- 12MB L3 cache
- Excellent legacy multi-threaded performance
Cons
- Very expensive on the used market
- Obsolete platform
- High power consumption
- No integrated graphics
- Lacks modern instruction sets like AVX2
Competitors & Alternatives
Intel Core i7-6800K
- AMD Ryzen 7 1700XRival
High-End Desktop
- Compare head-to-headIntel Core i7-5820KRival
High-End Desktop
- AMD Ryzen 7 1700Rival
High-End Desktop
- Compare head-to-headIntel Core i7-7800XRival
High-End Desktop
- Compare head-to-headIntel Core i7-6850KRival
High-End Desktop
- AMD Ryzen 5 5600XAlt
Vastly superior single-core speed and efficiency.
- Intel Core i5-12400FAlt
Modern alternative that beats it in almost everything.
- AMD Ryzen 7 5700XAlt
8 cores, better IPC, lower power.
Intel Core i7-990X
- RivalCompare head-to-head
- AMD FX-8150Rival
Desktop
- Intel Xeon X5690Rival
Workstation
- AMD Phenom II X6 1100TRival
Desktop
- Intel Core i7-2600KRival
Desktop
- Intel Xeon X5675Alt
A much cheaper server equivalent that can be overclocked on X58.
- Intel Core i5-12400FAlt
A modern budget CPU that obliterates it in every metric.
- AMD Ryzen 5 5600Alt
A modern 6-core CPU with vastly superior efficiency and IPC.
- Intel Core i7-3930KAlt
The direct successor platform offering better upgrade paths.
Our Verdict on Each
A solid entry point into the HEDT market, offering 6 cores and 28 PCIe lanes, though aging rapidly compared to modern alternatives.
Best for: Upgrading an existing X99 system for more cores.
Read the full reviewThe fastest processor of its generation. A collector's dream today, but practically obsolete for modern workloads.
Best for: Keeping an existing X58 system alive as long as possible.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i7-6800K or Intel Core i7-990X?
Based on our editorial ratings, the Intel Core i7-990X comes out ahead with a score of 8.8/10. 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 Core i7-6800K or Intel Core i7-990X?
For gaming, the Intel Core i7-6800K leads with a gaming performance score of 65/100 among Intel Core i7-6800K and Intel Core i7-990X.
Which uses less power?
The Intel Core i7-990X has the lowest rated TDP. Power draw across these chips: Intel Core i7-6800K (140 W), Intel Core i7-990X (130 W).
Do Intel Core i7-6800K and Intel Core i7-990X use the same socket?
No. They use different sockets (Intel Core i7-6800K: Intel Socket 2011-3, Intel Core i7-990X: LGA 1366), so each needs a compatible motherboard.
Which is faster in multi-core benchmarks?
The Intel Core i7-6800K posts the highest multi-core benchmark score. Multi-core results: Intel Core i7-6800K (13,000), Intel Core i7-990X (0). Benchmark figures are approximate and workload-dependent.