CPU Comparison
Intel Core i5-2500 vs Intel Core i5-2405S
A side-by-side comparison of specs, performance and value. The Intel Core i5-2500 is the standard 95 W quad-core desktop processor from the Sandy Bridge generation, featuring a 3.3 GHz base clock, 3.7 GHz turbo, and 6 MB of L3 cache for mainstream desktop computing.
The Bottom Line
Overview & Launch
Specifications Compared
Performance Compared
Productivity
Adequate for legacy office suites, but modern web browsers and productivity apps will feel sluggish.
CPU performance is identical to the i5-2400S, adequate for legacy apps.
Gaming
When paired with a contemporary discrete GPU, it could handle 2011-era games well, but is completely bottlenecked for modern titles.
HD 3000 can handle very old games, but nothing modern.
Virtualization
Supports VT-x and VT-d, but four threads restrict the number of useful virtual machines.
VM performance is constrained by the 4-thread limit.
Efficiency
Consumes up to 95 W under load, which is high by modern efficiency standards.
Excellent power metrics for a quad-core chip of its era.
Specialized Performance
AI / ML
- No AI acceleration hardware
- Lacks modern vector instruction extensions
- Fundamentally incapable of running modern AI models in a practical timeframe
- No AI acceleration capabilities
Content Creation
Gaming
- The CPU itself can still feed older GPUs adequately
- Modern games will be severely CPU-limited
- PCIe 2.0 may cause minor bottlenecks with modern high-end GPUs
- HD 3000 is noticeably faster than HD 2000 in legacy titles
- Still lacks DirectX 12 support
- Not viable for 3D gaming past 2012 standards
Industry Impact
Best CPU by Use Case
Target Audience
Strengths & Weaknesses
Pros
- Massive IPC improvement over previous generation
- High 3.3 GHz base clock for consistent performance
- Included AVX and AES-NI instructions
- Integrated HD 2000 graphics for basic display output
- Very stable platform with mature chipsets
Cons
- No Hyper-Threading
- Locked multiplier prevents easy overclocking
- Limited to PCIe 2.0
- Intel HD 2000 graphics are very weak
- Obsolete for any modern intensive workload
Pros
- Intel HD 3000 integrated graphics
- Quick Sync Video support
- Low 65W power draw
- Full 6 MB L3 cache
Cons
- Rare and potentially expensive on the used market
- No Hyper-Threading
- Lower clocks than standard 95W parts
- Lacks AVX2
- Not Windows 11 compatible
Competitors & Alternatives
Intel Core i5-2500
- AMD Phenom II X4 970Rival
Desktop Performance
- AMD Bulldozer FX-4100Rival
Desktop Mainstream
- AMD A8-3850Rival
Desktop APU
- Compare head-to-headIntel Core i5-2400Rival
Desktop Mainstream
- Intel Core i7-2600Rival
Desktop Premium
Offers an unlocked multiplier and better HD 3000 graphics for usually the same or lower used price.
Compare head-to-head- Intel Core i5-3450Alt
Ivy Bridge successor offering PCIe 3.0, better integrated graphics, and slightly better efficiency.
Intel Core i5-2405S
- AMD A8-3850Rival
Desktop APU
- AMD A6-3670Rival
Desktop APU
- Compare head-to-headIntel Core i5-2400SRival
Desktop
- Intel Core i3-2125Rival
Desktop
- AMD Phenom II X4 860TRival
Desktop
Better CPU clocks and better graphics within the same 65W TDP.
Compare head-to-head- AMD A10-5700Alt
Newer APU platform with significantly better graphics.
- Intel Core i7-2600SAlt
Adds Hyper-Threading for better multi-tasking.
- Intel Xeon E3-1245Alt
Similar HD 3000 graphics but in an 80W standard-power package.
Our Verdict on Each
A groundbreaking CPU in 2011 that offered incredible IPC gains over its predecessor, but its lack of Hyper-Threading and PCIe 2.0 limitation make it a museum piece today.
Best for: A direct drop-in replacement to repair an older family PC where the original CPU has failed.
Read the full reviewA niche OEM processor that offered better integrated graphics in a low-power package, now mostly useful for exact-match legacy repairs.
Best for: Replacing a failed CPU in a 2011 Apple iMac or premium AIO
Read the full reviewFrequently Asked Questions
Which is better, Intel Core i5-2500 or Intel Core i5-2405S?
Based on our editorial ratings, the Intel Core i5-2500 comes out ahead with a score of 5/10. That said, the best choice depends on your workload — check the spec and performance breakdown above for gaming, productivity and efficiency differences.
Which uses less power?
The Intel Core i5-2405S has the lowest rated TDP. Power draw across these chips: Intel Core i5-2500 (95 W), Intel Core i5-2405S (65 W).
Do Intel Core i5-2500 and Intel Core i5-2405S 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 i5-2500 posts the highest multi-core benchmark score. Multi-core results: Intel Core i5-2500 (4,200), Intel Core i5-2405S (2,400). Benchmark figures are approximate and workload-dependent.