IntelBX80684I58600K
IntelBX80623I52500K
$246

6 Cores, 6 Threads @3.6GHz, Coffee Lake.
Release date: Q4 2017.

 $246 

4 Cores, 4 Threads @3.3GHz, Sandy Bridge.
Release date: Q1 2011.

Real World Speed
Performance profile from 137,249 user samples
63,241 User Benchmarks
Best Bench: 118% Base clock 3.6 GHz, turbo 5.2 GHz (avg)
Worst Bench: 87% Base clock 3.6 GHz, turbo 0.8 GHz (avg)
Poor: 87% Great: 118%
SPEED RANK: 19th / 1137
Gaming
Gaming 101%
UFO
Desktop
Desktop 97%
Nuclear submarine
Workstation
Workstation 73%
Battleship
74,008 User Benchmarks
Best Bench: 90% Base clock 3.3 GHz
Worst Bench: 50% Base clock 3.6 GHz, turbo 0.8 GHz (avg)
Poor: 50% Great: 90%
SPEED RANK: 133rd / 1137
Gaming
Gaming 71%
Battleship
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 43%
Speed boat
Effective Speed
Effective CPU Speed
101 % Much faster effective speed.
+43%
70.6 %
SC Mixed
Avg. Single Core Mixed Speed
132 Pts Much faster single-core speed.
+35%
97.6 Pts
QC Mixed
Avg. Quad Core Mixed Speed
513 Pts Much faster quad-core speed.
+41%
365 Pts
MC Mixed
Avg. Multi Core Mixed Speed
741 Pts Hugely faster multi-core speed.
+99%
372 Pts
SC Mixed
OC Single Core Mixed Speed
153 Pts Faster OC single-core speed.
+26%
121 Pts
QC Mixed
OC Quad Core Mixed Speed
607 Pts Faster OC quad-core speed.
+29%
471 Pts
MC Mixed
OC Multi Core Mixed Speed
886 Pts Hugely faster OC multi-core speed.
+88%
472 Pts
Market Share
Based on 12,174,187 CPUs tested.
Market Share
Market Share (trailing 30 days)
1.64 % Hugely higher market share.
+134%
0.7 %
Value
Value For Money
109 % Much better value.
+45%
75.2 %
User Rating
UBM User Rating
134 % Hugely more popular.
+91%
70 %
Price
Price (score)
$237 +4% $246
Age
Newest
13 Months Hugely more recent.
+86%
94 Months
TDP
Thermal Design Power (TDP)
95 Watts 95 Watts
Cores
CPU Processing Cores
6 cores Much higher core count.
+50%
4 cores
Threads
CPU Processing Threads
6 threads Much higher thread count.
+50%
4 threads
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+56%
32 nm
Base Clock
Base Clock Speed
3.6 GHz Slightly faster base frequency.
+9%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.3 GHz Faster turbo frequency.
+16%
3.7 GHz
SC Int
Single Core Integer Speed
149 Pts Faster single-core int speed.
+23%
121 Pts
SC Float
Single Core Floating Point Speed
162 Pts Much faster single-core fp speed.
+33%
122 Pts
QC Int
Quad Core Integer Speed
580 Pts Faster quad-core int speed.
+23%
472 Pts
QC Float
Quad Core Floating Point Speed
640 Pts Much faster quad-core fp speed.
+35%
475 Pts
MC Int
Multi Core Integer Speed
843 Pts Much faster multi-core int speed.
+78%
474 Pts
MC Float
Multi Core Floating Point Speed
949 Pts Hugely faster multi-core fp speed.
+101%
473 Pts
Series
CPU Architecture
Coffee Lake Sandy Bridge
Socket
Motherboard Socket
FCLGA1151 LGA1155
Graphics
Integrated Graphics
UHD 630 HD 3000
Launch Date
Launch Date
Q4'17 Q1'11
Cache
Cache
9 MB 6 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX2 SSE4.1/4.2, AVX
Lithography
Lithography
14 nm 32 nm
Bus Speed
Bus Speed
8 GT/s DMI3 5 GT/s DMI
Max Memory Size
Max Memory Size (dependent on memory type)
64 GB 32 GB
Memory Types
Memory Types
DDR4-2666 DDR3 1066/1333
Processor Graphics
Processor Graphics ‡
Intel® UHD Graphics 630 Intel® HD Graphics 3000
Graphics Base Frequency
Graphics Base Frequency
350 MHz 850 MHz
# of Displays Supported
# of Displays Supported ‡
3 2
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.15 GHz 1.1 GHz
Virtualization for Directed I/O (VT-d)
Intel® Virtualization Technology for Directed I/O (VT-d) ‡
Yes No
vPro Tech
Intel® vPro™ Technology ‡
Yes No
Trusted Execution Tech
Intel® Trusted Execution Technology ‡
Yes No
PCI Express Revision
PCI Express Revision
3.0 2.0

More specs » More specs »
ADVERTISEMENT

The unlocked hex-core i5-8600K from Intel’s latest Coffee Lake generation of processors is the new flagship of the i5 series, succeeding the Kaby Lake quad-core i5-7600K. The 8th generation of processors brings the largest performance uplift since Sandy Bridge by adding more cores at each of the i3, i5 and i7 product lines. Like the other Coffee Lake processors, the i5-8600K is built upon optimized 14nm architecture, marginally improved upon from Kaby Lake and Skylake. The 8600K has a 95W TDP and a nominal stock clock of 3.6 GHz, which boosts to 4.1 GHz for all six cores, 4.2 GHz for dual/quad and 4.3 GHz for single core. Early benchmarks put the i5-8600K’s effective speed 15% ahead of the i5-7600K. A 50% increase in multi-core speed is explained by two additional cores and thanks to the quad-core clock bump from 4 GHz on the 7600K to 4.2 GHz on the 8600K there is also an additional 5% performance boost across all workloads. All Coffee Lake processors require a 300-series chipset, making a straight CPU upgrade unfeasible despite sharing the same socket as their Z270 predecessors. Even though most games still use less than 4 cores simultaneously, the i5-8600K is a great choice for gamers (especially streamers) but for $80 less, the 8350K which is faster than last years 7600K and only marginally weaker for gaming than the 8600K is certainly well worth considering as well. [Oct '17 CPUPro]

MORE DETAILS

The i5-2500K is a second generation Sandy Bridge processor which is currently two generations old and nearly three years out of date. The many users that had the good sense to purchase this processor should feel in no hurry to upgrade as it's still no slouch, even by today's standards. The benchmark figures indicate that, even at stock clock rates, in terms of real-world performance this processor is approximately 20% slower than the best currently available, not bad considering its age. Given that the 2500K has an unlocked multiplier upping its performance by 10% with stock cooling should not pose much of a problem for the majority of owners. Here is a detailed performance comparison of the 2500K vs 4670K.  [Jul '13 CPUPro]

MORE DETAILS

Processor Rankings (Price vs Performance) November 2018 CPU Rankings.

We calculate effective speed which measures real world performance for typical consumers. Effective speed is adjusted by current prices to yield a value for money rating which is geared towards gamers. Our calculated values are checked against thousands of individual user ratings. The customizable table below combines these factors to bring you the definitive list of top CPUs. [CPUPro]

ADVERTISEMENT

Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Best value for money - Value for money is based on real world performance.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
How Fast Is Your CPU? (Bench your build) Size up your PC in less than a minute.

Welcome to our freeware PC speed test tool. UserBenchmark will test your PC and compare the results to other users with the same components. You can quickly size up your PC, identify hardware problems and explore the best upgrades.

UserBenchmark of the month

How it works

  • - Download and run UserBenchMark.
  • - CPU tests include: integer, floating and string.
  • - GPU tests include: six 3D game simulations.
  • - Drive tests include: read, write, sustained write and mixed IO.
  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
  • - Identify the strongest components in your PC.
  • - See speed test results from other users.
  • - Compare your components to the current market leaders.
  • - Explore your best upgrade options with a virtual PC build.
  • - Compare your in-game FPS to other users with your hardware.
  • - Share your opinion by voting.

 Frequently Asked Questions

 Best User Rated

The Best.
CPUGPUSSD
Intel Core i7-8700K $359Nvidia GTX 1070 $340Samsung 850 Evo 250GB $89
AMD Ryzen 5 1600 $130Nvidia GTX 1060-6GB $245Samsung 850 Evo 500GB $97
Intel Core i5-8600K $237AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $45Corsair Vengeance LPX DDR4 3000 C15 2x8GB $130SanDisk Extreme 64GB $43
Seagate Barracuda 3TB (2016) $85G.SKILL Trident Z DDR4 3200 C14 4x16GB $869SanDisk Extreme 32GB $48
WD Blue 1TB (2012) $45Corsair Vengeance LPX DDR4 3200 C16 2x8GB $130SanDisk Ultra Fit 32GB $12
Today's hottest deals
User Guide  •  About  •  FAQs  •  Email  •  Privacy  •  Developer Feedback