CPU Comparison
Intel Core i5-2500K vs Intel Core i5-2500S
A side-by-side comparison of specs, performance and value. The Intel Core i5-2500K is an unlocked 95 W quad-core Sandy Bridge desktop processor that revolutionized enthusiast overclocking with its accessible multiplier adjustments, featuring 3.3 GHz base, 3.7 GHz turbo, and Intel HD 3000 graphics.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Fast for its era, but lacks the threads and IPC for modern productivity suites.
Handles legacy office workloads well, but sustained multi-core loads cause it to throttle below standard i5-2500 speeds.
Gaming
When overclocked to 4.5 GHz+, it can still handle older esports titles, but is heavily bottlenecked in modern CPU-intensive games.
Intel HD 2000 graphics prevent any meaningful modern gaming experience.
Virtualization
Lacks VT-d, which limits advanced virtualization passthrough configurations, though basic VT-x works fine.
Good enterprise virtualization feature support, but limited by four total threads.
Efficiency
When overclocked, power consumption can easily exceed 150 W, making it highly inefficient by modern standards.
Excellent efficiency for 2011, drawing significantly less power at idle and light loads than 95 W parts.
Specialized Performance
AI / ML
- No AI acceleration hardware
- Lacks AVX2 and modern vector instructions required for AI frameworks
- Completely unsuitable for AI workloads
- No AI acceleration capabilities
- AVX support exists but lacks AVX2 for modern workloads
- Far too slow for practical AI tasks
Content Creation
Gaming
- At stock speeds, it is outperformed by modern budget CPUs
- When overclocked to 4.5+ GHz, it remains playable in older esports titles like CS:GO
- Severe bottleneck in modern open-world and CPU-heavy games
- PCIe 2.0 may slightly limit top-tier GPU performance
- Intel HD 2000 is a severe bottleneck for 3D rendering
- Can handle older 2D or very light 3D indie games
- Requires a discrete GPU for any acceptable gaming experience
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Legendary overclocking headroom (4.5-5.0 GHz on air/water)
- Unlocked multiplier made tuning accessible to beginners
- Intel HD 3000 with Quick Sync was excellent for video encoding
- Launched at an incredibly competitive $216
- Historic significance in the enthusiast PC community
Cons
- No Hyper-Threading (4 cores, 4 threads)
- Limited to PCIe 2.0
- Lacks VT-d for advanced virtualization
- High power draw when overclocked
- Completely obsolete for modern gaming and productivity
Pros
- Matches the 3.7 GHz turbo of the standard 95 W i5-2500
- 65 W TDP allows for much quieter, smaller cooling solutions
- Full enterprise feature set including TXT and VT-d
- Lower idle power consumption than standard desktop parts
- Reliable Sandy Bridge architecture
Cons
- Lower sustained multi-core clocks due to 65 W limit
- Intel HD 2000 graphics are very weak
- Locked multiplier
- No Hyper-Threading
- Obsolete platform with no upgrade path
Competitors & Alternatives
Intel Core i5-2500K
- AMD Phenom II X4 980Rival
Desktop Performance
- AMD Bulldozer FX-4150Rival
Desktop Enthusiast
- Intel Core i7-2600KRival
Desktop Premium
- Compare head-to-headIntel Core i5-2400Rival
Desktop Mainstream
- AMD FX-6100Rival
Desktop Multi-thread
Ivy Bridge successor with PCIe 3.0, better integrated graphics, and cooler running temperatures.
Compare head-to-head- AMD Ryzen 5 5600Alt
A modern budget option that offers vastly superior performance for a similar inflation-adjusted price.
Intel Core i5-2500S
- AMD Phenom II X4 840TRival
Low Power Desktop
- AMD A8-3820Rival
Desktop APU
- Compare head-to-headIntel Core i5-2400SRival
Low Power Desktop
- AMD A6-3670Rival
Budget Desktop
- Compare head-to-headIntel Core i5-2500TRival
Ultra Low Power Desktop
If your SFF chassis can handle 95 W, the standard 2500 offers better sustained performance for less money.
Compare head-to-headIvy Bridge successor with better integrated graphics and slightly improved efficiency.
Compare head-to-head- Intel Core i7-2600SAlt
Adds Hyper-Threading (8 threads) for better multi-tasking within the same 65 W power envelope.
Our Verdict on Each
A historic processor that offered unmatched overclocking headroom for its price. While obsolete for modern gaming, its legacy as the king of early 2010s budget performance is well-deserved.
Best for: Restoring a vintage 2011 gaming rig or for a collector wanting a piece of PC hardware history.
Read the full reviewA highly effective power-optimized Sandy Bridge chip that delivered excellent burst performance for its 65 W TDP, though entirely outclassed today.
Best for: Replacing a failed CPU in a proprietary Small Form Factor PC that strictly requires a 65 W or lower processor.
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i5-2500K or Intel Core i5-2500S?
Based on our editorial ratings, the Intel Core i5-2500K comes out ahead with a score of 7/10. 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 i5-2500K or Intel Core i5-2500S?
For gaming, the Intel Core i5-2500K leads with a gaming performance score of 22/100 among Intel Core i5-2500K and Intel Core i5-2500S.
Which uses less power?
The Intel Core i5-2500S has the lowest rated TDP. Power draw across these chips: Intel Core i5-2500K (95 W), Intel Core i5-2500S (65 W).
Do Intel Core i5-2500K and Intel Core i5-2500S use the same socket?
Yes — all of these CPUs use the LGA 1155 socket, so they share compatible motherboards.
Which is faster in multi-core benchmarks?
The Intel Core i5-2500K posts the highest multi-core benchmark score. Multi-core results: Intel Core i5-2500K (4,200), Intel Core i5-2500S (3,800). Benchmark figures are approximate and workload-dependent.