Core i5-6600K vs Opteron 6276
Core i5-6600K
Opteron 6276
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 Core i5-6600K is positioned at rank 662 and the Opteron 6276 is on rank 53, so the Opteron 6276 offers better cost-efficiency for playing games.
Avg price is the current average price collected from markets across the web.
Performance Per Dollar Core i5-6600K
Performance Per Dollar Opteron 6276
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i5-6600K | Opteron 6276 |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($105) | ⚠️ Higher cost ($397) |
| Longevity | 🛑 Legacy (Skylake (2015−2016) / 14 nm) | 🛑 Legacy (Interlagos (2011−2012) / 32 nm) |
💎 Value Proposition
| Insight | Core i5-6600K | Opteron 6276 |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+275%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($105) | ⚠️ Higher cost ($397) |
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 Core i5-6600K and Opteron 6276
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.
Opteron 6276
The Opteron 6276 is manufactured by AMD. It was released in 14 November 2011 (14 years ago). It is based on the Interlagos (2011−2012) architecture. It features 16 cores and 16 threads. Base frequency is 2.3 GHz, with boost up to 3.2 GHz. L3 cache: 8 MB (total). L2 cache: 2 MB (per module). Built on 32 nm process technology. Socket: G34. Thermal design power (TDP): 115 Watt. Memory support: DDR3. Passmark benchmark score: 6,348 points. Launch price was $119.
Processing Power
The Core i5-6600K packs 4 cores / 4 threads, while the Opteron 6276 offers 16 cores / 16 threads — the Opteron 6276 has 12 more cores. Boost clocks reach 3.9 GHz on the Core i5-6600K versus 3.2 GHz on the Opteron 6276 — a 19.7% clock advantage for the Core i5-6600K (base: 3.5 GHz vs 2.3 GHz). The Core i5-6600K uses the Skylake (2015−2016) architecture (14 nm), while the Opteron 6276 uses Interlagos (2011−2012) (32 nm). In PassMark, the Core i5-6600K scores 6,301 against the Opteron 6276's 6,348 — a 0.7% lead for the Opteron 6276. L3 cache: 6 MB (total) on the Core i5-6600K vs 8 MB (total) on the Opteron 6276.
| Feature | Core i5-6600K | Opteron 6276 |
|---|---|---|
| Cores / Threads | 4 / 4 | 16 / 16+300% |
| Boost Clock | 3.9 GHz+22% | 3.2 GHz |
| Base Clock | 3.5 GHz+52% | 2.3 GHz |
| L3 Cache | 6 MB (total) | 8 MB (total)+33% |
| L2 Cache | 256 kB (per core) | 2 MB (per module)+700% |
| Process | 14 nm-56% | 32 nm |
| Architecture | Skylake (2015−2016) | Interlagos (2011−2012) |
| PassMark | 6,301 | 6,348 |
Memory & Platform
The Core i5-6600K uses the LGA1151 socket (PCIe 3.0), while the Opteron 6276 uses G34 (PCIe 2.0) — making them incompatible on the same motherboard.
| Feature | Core i5-6600K | Opteron 6276 |
|---|---|---|
| Socket | LGA1151 | G34 |
| PCIe Generation | PCIe 3.0+50% | PCIe 2.0 |
Value Analysis
The Core i5-6600K launched at $242 MSRP, while the Opteron 6276 debuted at $788. At current prices ($105 vs $397), the Core i5-6600K is $292 cheaper. In terms of value (PassMark points per dollar), the Core i5-6600K delivers 60.0 pts/$ vs 16.0 pts/$ for the Opteron 6276 — making the Core i5-6600K the 115.8% better value option.
| Feature | Core i5-6600K | Opteron 6276 |
|---|---|---|
| MSRP | $242-69% | $788 |
| Avg Price (30d) | $105-74% | $397 |
| Performance per Dollar | 60.0+275% | 16.0 |
| Release Date | 2015 | 2011 |
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