Intel Core i5-2500K vs Intel Core i5-3570K Comparison

The Intel Core i5-2500K and Intel Core i5-3570K are two of the most closely watched Socket 1155 quad-core chips in the database, and the recorded data paints a picture that is more nuanced than a simple generational hierarchy. On paper the i5-3570K, Intel's Ivy Bridge successor, sweeps the Cinebench suite with margins in the mid-teens, yet the older Sandy Bridge i5-2500K quietly takes both Geekbench tests, including a clear multi-core win. Add in a lower TDP, a smaller die, and a newer graphics and PCIe generation for the 3570K, and the choice between them becomes a genuine question of workload rather than a one-sided verdict.

Where Each One Wins

The i5-3570K dominates the Cinebench results across every recorded version. Its 425-point Cinebench R15 multi-core score, 1772-point R20 multi-core score, and 4221-point R23 multi-core score place it roughly 16 to 17 percent ahead of the 2500K in rendering throughput, and the single-core Cinebench results repeat the same pattern: 250 versus 208 in R20 and 596 versus 497 in R23. For sustained rendering work in Cinebench-based workflows, the Ivy Bridge chip is the clear winner, and the consistency of that gap across R15, R20, and R23 suggests an architectural improvement rather than a one-off test anomaly.

The 2500K flips the script in Geekbench. It wins multi-core 2434 to 2245, an 8.4 percent advantage, and single-core 805 to 776, a 3.7 percent edge. That divergence is worth questioning: why would a chip that loses Cinebench by 17 percent win Geekbench by more than 8? The database cannot answer definitively, but the split implies that short-burst, mixed workloads of the kind Geekbench emphasizes behave differently on Sandy Bridge than the long, homogeneous rendering passes Cinebench runs. Users whose work resembles one benchmark profile over the other should weight that benchmark accordingly.

Both chips sit at the 35th percentile versus all CPUs in the database, with nearly identical average benchmark scores of 1329 for the 2500K and 1293 for the 3570K, so in aggregate terms neither escapes the other's neighborhood.

FAQ

Q: Which CPU is faster in Cinebench rendering?

A: The i5-3570K wins every recorded Cinebench test. In multi-core it scores 425 in R15, 1772 in R20, and 4221 in R23, versus 354, 1479, and 3523 for the i5-2500K, margins of roughly 16.5 to 16.7 percent. Single-core gaps are similar: 250 versus 208 in R20 and 596 versus 497 in R23.

Q: Does the i5-2500K win anything?

A: Yes. It takes both Geekbench tests, scoring 2434 in multi-core against 2245 for the 3570K, and 805 in single-core against 776. Its overall record in head-to-head comparisons is 2 wins to the 3570K's 5.

Q: Do both chips use the same socket and memory?

A: Both are Socket 1155 desktop parts with dual-channel DDR3 support and identical 25.6 GB/s memory bandwidth. Neither supports ECC memory.

Q: Which chip runs cooler according to the specs?

A: The i5-3570K has the lower rated TDP at 77 watts versus 95 watts for the i5-2500K, a consequence of its 22 nm process node against the 2500K's 32 nm node.

Q: Are both overclockable?

A: Yes, both have unlocked multipliers, a defining trait of these K-series parts.

Q: How do their integrated graphics compare?

A: The i5-3570K carries Intel HD 4000 while the i5-2500K carries Intel HD 3000, and the 3570K additionally offers PCIe Gen 3 CPU lanes versus Gen 2 on the 2500K.

Architecture Differences

The two chips are separated by one Intel architectural tick. The i5-2500K is Sandy Bridge, built on a 32 nm process with 1,160 million transistors packed into a 216 mm² die. The i5-3570K is Ivy Bridge, manufactured on a 22 nm process, squeezing 1,400 million transistors into a much smaller 160 mm² die. That combination of more transistors and less silicon is the classic signature of a node shrink, and it explains the TDP drop from 95 watts to 77 watts alongside the higher clocks.

Structurally, the two are strikingly similar. Both are quad-core, quad-thread parts with identical cache hierarchies: 64 KB of L1 per core, 256 KB of L2 per core, and a shared 6 MB of L3. Both are desktop Socket 1155 chips with dual-channel DDR3 controllers and no ECC support. Both have unlocked multipliers.

The meaningful differences beyond the node are in the platform-facing features. The 3570K moves the CPU's PCIe interface from Gen 2 to Gen 3 across its 16 lanes, doubling per-lane bandwidth for a discrete GPU, and upgrades the integrated graphics from HD 3000 to HD 4000. The release dates also differ by more than a year: the 2500K launched January 8, 2011 at a launch MSRP of $216, while the 3570K arrived April 28, 2012 at a launch MSRP of $212. Both are now end-of-life parts.

Head-to-Head Benchmarks

The Cinebench story is uniform. In Cinebench R15 multi-core, the 3570K posts 425 against 354 for the 2500K, a 16.7 percent gap. R20 multi-core goes 1772 to 1479, a 16.5 percent margin, and R23 multi-core reads 4221 to 3523, 16.5 percent again. Single-core results match: R20 single is 250 versus 208 (16.8 percent), and R23 single is 596 versus 497 (16.6 percent). Five tests, five wins for Ivy Bridge, and the near-identical deltas suggest the improvement comes from a combination of higher clocks (3.40 base and 3.80 boost versus 3.30 and 3.70) and per-clock gains from the newer architecture.

Geekbench breaks the pattern in the older chip's favor. The 2500K's 2434 multi-core score beats the 3570K's 2245 by 8.4 percent, and its 805 single-core score beats 776 by 3.7 percent. That is the most curious result in this comparison: a chip trailing by 17 percent in one suite leads by more than 8 percent in another. Whether this reflects test duration, memory behavior, or workload mix, the recorded data shows the two suites disagreeing, and users should treat the aggregate picture with that disagreement in mind.

Context from the rivals list reinforces how evenly matched they are in the database's averaging scheme. The 2500K's average score of 1329 sits within a fraction of a percent of the Intel Core i5-4460S (1330, a 0.1 percent delta), the Intel Core i5-760 (1337), and the Intel Celeron G6900T and G6900E (both 1321). The 3570K's 1293 average similarly hugs the Intel Core i7-3630QM (1289), Intel Core i7-3610QE (1297), AMD Opteron 6272 (1288), and Intel Core i5-4670R (1286). Both sit at the 35th percentile against all CPUs.

The Verdict

For Cinebench-class rendering work, the data is unambiguous: the i5-3570K wins every Cinebench test by roughly 16 to 17 percent, single-core and multi-core alike. If the workload is long rendering passes, Ivy Bridge is the pick, and it brings a lower 77-watt TDP, PCIe Gen 3 lanes, and HD 4000 graphics as additional advantages on the same Socket 1155 platform.

For workloads that resemble Geekbench's mixed, bursty profile, the i5-2500K is the stronger recorded performer, ahead by 8.4 percent in multi-core and 3.7 percent in single-core. Given identical cache layouts, identical memory support, and the same socket and thread count, the decision reduces to which benchmark family better represents the user's real workload. In aggregate the two are effectively peers, separated by an average score gap of just 36 points and occupying the same 35th percentile.

Specification Differences

• Architecture / codename: Sandy Bridge (i5-2500K) versus Ivy Bridge (i5-3570K)
• Process node: 32 nm versus 22 nm
• Transistors: 1,160 million versus 1,400 million
• Die size: 216 mm² versus 160 mm²
• TDP: 95 watts versus 77 watts
• Base clock: 3.30 GHz versus 3.40 GHz
• Boost clock: 3.70 GHz versus 3.80 GHz
• PCIe: Gen 2, 16 CPU lanes versus Gen 3, 16 CPU lanes
• Integrated graphics: Intel HD 3000 versus Intel HD 4000
• Release date: January 8, 2011 versus April 28, 2012
• Launch MSRP: $216 versus $212
• Part number: SR008 versus SR0PM

Everything else in the recorded data matches: 4 cores, 4 threads, Socket 1155, 6 MB shared L3 with identical L1 and L2 per core, dual-channel DDR3 at 25.6 GB/s, no ECC, unlocked multipliers, desktop segment, and end-of-life status for both.