Xeon E5-1681 V3 vs Core i7-6900K
Xeon E5-1681 V3
Core i7-6900K
Performance Spectrum - CPU
About PassMark
PassMark CPU Mark evaluates processor speed through complex mathematical computations. It provides a reliable metric to compare multi-core performance, where higher scores indicate faster processing for multitasking, gaming, and heavy workloads.
Value Upgrade Path
This is the official ChipVERSUS Value Rating, comparing raw performance (PassMark) per dollar. Components placed above yours deliver better value for money.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon E5-1681 V3
Performance Per Dollar Core i7-6900K
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5-1681 V3 | Core i7-6900K |
|---|---|---|
| Gaming | ❌ Lower gaming performance | ✅ Superior gaming performance |
| Workstation | ✅ Better multi-core power | ❌ Weaker in multi-core tasks |
| Price | ✅ More affordable ($200) | ⚠️ Higher cost ($1,089) |
| Longevity | 🛑 Legacy (Haswell-EP (2014−2015) / 22 nm) | 🛑 Legacy (Broadwell-E (2016) / 14 nm) |
💎 Value Proposition
| Insight | Xeon E5-1681 V3 | Core i7-6900K |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+450%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($200) | ⚠️ Higher cost ($1,089) |
Performance Check
To accurately isolate CPU performance, all benchmarks below use an NVIDIA RTX 4090 as the reference GPU. This eliminates GPU-side bottlenecks and highlights pure processing throughput differences between the CPUs.
Note: Real-world results may vary based on your actual GPU. CPU performance impact is more visible in processing-intensive titles and high-refresh-rate gaming scenarios.
Technical Specifications
Side-by-side comparison of Xeon E5-1681 V3 and Core i7-6900K
Xeon E5-1681 V3
The Xeon E5-1681 V3 is manufactured by Intel. It was released in 2015-01-01. It is based on the Haswell-EP (2014−2015) architecture. It features 10 cores and 20 threads. Base frequency is 2.9 GHz, with boost up to 3.5 GHz. L3 cache: 25 MB (total). L2 cache: 256K (per core). Built on 22 nm process technology. Socket: LGA2011-3. Thermal design power (TDP): 135 Watt. Memory support: DDR4-2133. Passmark benchmark score: 14,820 points. Launch price was $800.
Core i7-6900K
The Core i7-6900K is manufactured by Intel. It was released in 31 May 2016 (9 years ago). It is based on the Broadwell-E (2016) architecture. It features 8 cores and 16 threads. Base frequency is 3.2 GHz, with boost up to 4 GHz. L3 cache: 20 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 14,682 points. Launch price was $1,020.
Processing Power
The Xeon E5-1681 V3 packs 10 cores / 20 threads, while the Core i7-6900K offers 8 cores / 16 threads — the Xeon E5-1681 V3 has 2 more cores. Boost clocks reach 3.5 GHz on the Xeon E5-1681 V3 versus 4 GHz on the Core i7-6900K — a 13.3% clock advantage for the Core i7-6900K (base: 2.9 GHz vs 3.2 GHz). The Xeon E5-1681 V3 uses the Haswell-EP (2014−2015) architecture (22 nm), while the Core i7-6900K uses Broadwell-E (2016) (14 nm). In PassMark, the Xeon E5-1681 V3 scores 14,820 against the Core i7-6900K's 14,682 — a 0.9% lead for the Xeon E5-1681 V3. Geekbench 6 single-core — the metric most relevant to gaming — records 1,050 vs 1,273, a 19.2% lead for the Core i7-6900K that directly translates to higher frame rates. Multi-core Geekbench: 9,000 vs 7,591 (17% advantage for the Xeon E5-1681 V3). L3 cache: 25 MB (total) on the Xeon E5-1681 V3 vs 20 MB (total) on the Core i7-6900K.
| Feature | Xeon E5-1681 V3 | Core i7-6900K |
|---|---|---|
| Cores / Threads | 10 / 20+25% | 8 / 16 |
| Boost Clock | 3.5 GHz | 4 GHz+14% |
| Base Clock | 2.9 GHz | 3.2 GHz+10% |
| L3 Cache | 25 MB (total)+25% | 20 MB (total) |
| L2 Cache | 256K (per core) | 256 kB (per core) |
| Process | 22 nm | 14 nm-36% |
| Architecture | Haswell-EP (2014−2015) | Broadwell-E (2016) |
| PassMark | 14,820 | 14,682 |
| Geekbench 6 Single | 1,050 | 1,273+21% |
| Geekbench 6 Multi | 9,000+19% | 7,591 |
Memory & Platform
The Xeon E5-1681 V3 uses the LGA2011-3 socket (PCIe 3.0), while the Core i7-6900K uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard. Both support up to DDR4-2133 memory speed. The Xeon E5-1681 V3 supports up to 768 GB of RAM compared to 128 GB — 142.9% more capacity for professional workloads. Both feature 4-channel memory with ECC support. Both provide 40 PCIe lanes. Chipset compatibility: C612,X99 (Xeon E5-1681 V3) and X99 (Core i7-6900K).
| Feature | Xeon E5-1681 V3 | Core i7-6900K |
|---|---|---|
| Socket | LGA2011-3 | LGA2011 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2133 | DDR4-2400 |
| Max RAM Capacity | 768 GB+500% | 128 GB |
| RAM Channels | 4 | 4 |
| ECC Support | ✅ | ❌ |
| PCIe Lanes | 40 | 40 |
Advanced Features
Virtualization support: Yes (Xeon E5-1681 V3) vs VT-x, VT-d (Core i7-6900K). Primary use case: Core i7-6900K targets High-End Desktop.
| Feature | Xeon E5-1681 V3 | Core i7-6900K |
|---|---|---|
| Integrated GPU | No | No |
| IGPU Model | — | None |
| Unlocked | — | Yes |
| AVX-512 | No | No |
| Virtualization | Yes | VT-x, VT-d |
| Target Use | — | High-End Desktop |
Value Analysis
The Xeon E5-1681 V3 launched at $1589 MSRP, while the Core i7-6900K debuted at $1089. At current prices ($200 vs $1089), the Xeon E5-1681 V3 is $889 cheaper. In terms of value (PassMark points per dollar), the Xeon E5-1681 V3 delivers 74.1 pts/$ vs 13.5 pts/$ for the Core i7-6900K — making the Xeon E5-1681 V3 the 138.4% better value option.
| Feature | Xeon E5-1681 V3 | Core i7-6900K |
|---|---|---|
| MSRP | $1589 | $1089-31% |
| Avg Price (30d) | $200-82% | $1089 |
| Performance per Dollar | 74.1+449% | 13.5 |
| Release Date | 2014 | 2016 |
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