Xeon E5-2658 vs Core i5-6600K
Xeon E5-2658
Core i5-6600K
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. The Xeon E5-2658 is positioned at rank 699 and the Core i5-6600K is on rank 662, so the Core i5-6600K offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Xeon E5-2658
Performance Per Dollar Core i5-6600K
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Xeon E5-2658 | Core i5-6600K |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ⚠️ Higher cost ($400) | ✅ More affordable ($105) |
| Longevity | 🛑 Legacy (Sandy Bridge-EP (2012) / 32 nm) | 🛑 Legacy (Skylake (2015−2016) / 14 nm) |
💎 Value Proposition
| Insight | Xeon E5-2658 | Core i5-6600K |
|---|---|---|
| Cost Efficiency | ❌ Lower cost efficiency | ✅ Better overall value (+285%) |
| Upfront Cost | ⚠️ Higher cost ($400) | ✅ More affordable ($105) |
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 E5-2658 and Core i5-6600K
Xeon E5-2658
The Xeon E5-2658 is manufactured by Intel. It was released in 6 March 2012 (13 years ago). It is based on the Sandy Bridge-EP (2012) architecture. It features 8 cores and 16 threads. Base frequency is 2.1 GHz, with boost up to 2.4 GHz. L3 cache: 20480 kB (total). L2 cache: 256 kB (per core). Built on 32 nm process technology. Socket: LGA2011. Thermal design power (TDP): 95 Watt. Memory support: DDR3. Passmark benchmark score: 6,232 points. Launch price was $1,462.
Core i5-6600K
The Core i5-6600K is manufactured by Intel. It was released in 5 August 2015 (10 years ago). It is based on the Skylake (2015−2016) architecture. It features 4 cores and 4 threads. Base frequency is 3.5 GHz, with boost up to 3.9 GHz. L3 cache: 6 MB (total). L2 cache: 256 kB (per core). Built on 14 nm process technology. Socket: LGA1151. Thermal design power (TDP): 91 Watt. Memory support: DDR3, DDR4. Passmark benchmark score: 6,301 points. Launch price was $242.
Processing Power
The Xeon E5-2658 packs 8 cores / 16 threads, while the Core i5-6600K offers 4 cores / 4 threads — the Xeon E5-2658 has 4 more cores. Boost clocks reach 2.4 GHz on the Xeon E5-2658 versus 3.9 GHz on the Core i5-6600K — a 47.6% clock advantage for the Core i5-6600K (base: 2.1 GHz vs 3.5 GHz). The Xeon E5-2658 uses the Sandy Bridge-EP (2012) architecture (32 nm), while the Core i5-6600K uses Skylake (2015−2016) (14 nm). In PassMark, the Xeon E5-2658 scores 6,232 against the Core i5-6600K's 6,301 — a 1.1% lead for the Core i5-6600K. L3 cache: 20480 kB (total) on the Xeon E5-2658 vs 6 MB (total) on the Core i5-6600K.
| Feature | Xeon E5-2658 | Core i5-6600K |
|---|---|---|
| Cores / Threads | 8 / 16+100% | 4 / 4 |
| Boost Clock | 2.4 GHz | 3.9 GHz+63% |
| Base Clock | 2.1 GHz | 3.5 GHz+67% |
| L3 Cache | 20480 kB (total)+233% | 6 MB (total) |
| L2 Cache | 256 kB (per core) | 256 kB (per core) |
| Process | 32 nm | 14 nm-56% |
| Architecture | Sandy Bridge-EP (2012) | Skylake (2015−2016) |
| PassMark | 6,232 | 6,301+1% |
Memory & Platform
The Xeon E5-2658 uses the LGA2011 socket (PCIe 5.0), while the Core i5-6600K uses LGA1151 (PCIe 3.0) — making them incompatible on the same motherboard.
| Feature | Xeon E5-2658 | Core i5-6600K |
|---|---|---|
| Socket | LGA2011 | LGA1151 |
| PCIe Generation | PCIe 5.0+67% | PCIe 3.0 |
Value Analysis
The Xeon E5-2658 launched at $400 MSRP, while the Core i5-6600K debuted at $242. At current prices ($400 vs $105), the Core i5-6600K is $295 cheaper. In terms of value (PassMark points per dollar), the Xeon E5-2658 delivers 15.6 pts/$ vs 60.0 pts/$ for the Core i5-6600K — making the Core i5-6600K the 117.6% better value option.
| Feature | Xeon E5-2658 | Core i5-6600K |
|---|---|---|
| MSRP | $400 | $242-40% |
| Avg Price (30d) | $400 | $105-74% |
| Performance per Dollar | 15.6 | 60.0+285% |
| Release Date | 2012 | 2015 |
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