Core i5-10400T vs Core i7-5820K
Core i5-10400T
Core i7-5820K
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 Core i5-10400T
Performance Per Dollar Core i7-5820K
Performance Comparison
About PassMark🏆 Chipversus Verdict
🚀 Performance Leadership
| Insight | Core i5-10400T | Core i7-5820K |
|---|---|---|
| Gaming | ✅ Superior gaming performance | ❌ Lower gaming performance |
| Workstation | ❌ Weaker in multi-core tasks | ✅ Better multi-core power |
| Price | ✅ More affordable ($100) | ⚠️ Higher cost ($103) |
| Longevity | ✨ Modern (Legacy / 14 nm) | 🛑 Legacy (Haswell-E (2014) / 22 nm) |
💎 Value Proposition
| Insight | Core i5-10400T | Core i7-5820K |
|---|---|---|
| Cost Efficiency | ✅ Better overall value (+3%) | ❌ Lower cost efficiency |
| Upfront Cost | ✅ More affordable ($100) | ⚠️ Higher cost ($103) |
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 i5-10400T and Core i7-5820K
Core i5-10400T
The Core i5-10400T is manufactured by Intel. It was released in 1 April 2020 (5 years ago). It features 6 cores and 12 threads. Base frequency is 2 GHz, with boost up to 3.6 GHz. L3 cache: 12 MB Intel® Smart Cache. Built on 14 nm process technology. Socket: LGA1200. Thermal design power (TDP): 35 Watt. Memory support: DDR4-2666. Passmark benchmark score: 9,789 points. Launch price was $149.
Core i7-5820K
The Core i7-5820K is manufactured by Intel. It was released in 1 September 2014 (11 years ago). It is based on the Haswell-E (2014) architecture. It features 6 cores and 12 threads. Base frequency is 3.3 GHz, with boost up to 3.6 GHz. L3 cache: 15 MB (total). L2 cache: 256 kB (per core). Built on 22 nm process technology. Socket: LGA2011. Thermal design power (TDP): 140 Watt. Memory support: DDR4. Passmark benchmark score: 9,826 points. Launch price was $410.
Processing Power
Both the Core i5-10400T and Core i7-5820K share an identical 6-core/12-thread configuration. Boost clocks reach 3.6 GHz on the Core i5-10400T versus 3.6 GHz on the Core i7-5820K — identical boost frequencies (base: 2 GHz vs 3.3 GHz). The Core i7-5820K is built on the Haswell-E (2014) architecture. In PassMark, the Core i5-10400T scores 9,789 against the Core i7-5820K's 9,826 — a 0.4% lead for the Core i7-5820K. Geekbench 6 single-core — the metric most relevant to gaming — records 1,272 vs 1,134, a 11.5% lead for the Core i5-10400T that directly translates to higher frame rates. L3 cache: 12 MB Intel® Smart Cache on the Core i5-10400T vs 15 MB (total) on the Core i7-5820K.
| Feature | Core i5-10400T | Core i7-5820K |
|---|---|---|
| Cores / Threads | 6 / 12 | 6 / 12 |
| Boost Clock | 3.6 GHz | 3.6 GHz |
| Base Clock | 2 GHz | 3.3 GHz+65% |
| L3 Cache | 12 MB Intel® Smart Cache | 15 MB (total)+25% |
| L2 Cache | — | 256 kB (per core) |
| Process | 14 nm-36% | 22 nm |
| Architecture | — | Haswell-E (2014) |
| PassMark | 9,789 | 9,826 |
| Cinebench R23 Multi | — | 5,700 |
| Geekbench 6 Single | 1,272+12% | 1,134 |
| Geekbench 6 Multi | — | 5,383 |
Memory & Platform
The Core i5-10400T uses the LGA1200 socket (PCIe 3.0), while the Core i7-5820K uses LGA2011 (PCIe 3.0) — making them incompatible on the same motherboard. Both support up to DDR4-2666 memory speed. The Core i5-10400T supports up to 128 GB of RAM compared to 64 GB — 66.7% more capacity for professional workloads. Memory channels: 2 (Core i5-10400T) vs 4 (Core i7-5820K). PCIe lanes: 16 (Core i5-10400T) vs 28 (Core i7-5820K) — the Core i7-5820K offers 12 more lanes for additional GPUs or NVMe drives. Chipset compatibility: H410,B460,H470,Z490,H510,B560,H570,Z590 (Core i5-10400T) and Intel X99 (Core i7-5820K).
| Feature | Core i5-10400T | Core i7-5820K |
|---|---|---|
| Socket | LGA1200 | LGA2011 |
| PCIe Generation | PCIe 3.0 | PCIe 3.0 |
| Max RAM Speed | DDR4-2666 | DDR4-2133 |
| Max RAM Capacity | 128 GB+100% | 64 GB |
| RAM Channels | 2 | 4+100% |
| ECC Support | ❌ | ❌ |
| PCIe Lanes | 16 | 28+75% |
Advanced Features
Only the Core i7-5820K has an unlocked multiplier for overclocking — a significant advantage for enthusiasts seeking extra performance. Virtualization support: VT-x, VT-d, EPT (Core i5-10400T) vs Yes (Core i7-5820K). The Core i5-10400T includes integrated graphics (UHD Graphics 630), while the Core i7-5820K requires a dedicated GPU. Primary use case: Core i5-10400T targets Low Power Desktop, Core i7-5820K targets Enthusiast Workstation. Direct competitor: Core i5-10400T rivals Ryzen 5 3400GE; Core i7-5820K rivals Ryzen 5 1600.
| Feature | Core i5-10400T | Core i7-5820K |
|---|---|---|
| Integrated GPU | Yes | No |
| IGPU Model | UHD Graphics 630 | — |
| Unlocked | No | Yes |
| AVX-512 | No | No |
| Virtualization | VT-x, VT-d, EPT | Yes |
| Target Use | Low Power Desktop | Enthusiast Workstation |
Value Analysis
The Core i5-10400T launched at $182 MSRP, while the Core i7-5820K debuted at $389. At current prices ($100 vs $103), the Core i5-10400T is $3 cheaper. In terms of value (PassMark points per dollar), the Core i5-10400T delivers 97.9 pts/$ vs 95.4 pts/$ for the Core i7-5820K — making the Core i5-10400T the 2.6% better value option.
| Feature | Core i5-10400T | Core i7-5820K |
|---|---|---|
| MSRP | $182-53% | $389 |
| Avg Price (30d) | $100-3% | $103 |
| Performance per Dollar | 97.9+3% | 95.4 |
| Release Date | 2020 | 2014 |
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