IntelBX80684I78700K
IntelBX80623I52500K
$246

6 Cores, 12 Threads
@3.7GHz Coffee Lake (2017)

 $246 

4 Cores, 4 Threads
@3.3GHz Sandy Bridge (2011)

Real World Speed
Performance profile from 164,527 user samples
97,308 User Benchmarks
Best Bench: 124% Base clock 3.7 GHz, turbo 5.15 GHz (avg)
Worst Bench: 94% Base clock 3.7 GHz, turbo 2.05 GHz (avg)
Poor: 94% Great: 124%
SPEED RANK: 7th / 1117
Gaming
Gaming 109%
UFO
Desktop
Desktop 106%
UFO
Workstation
Workstation 96%
Nuclear submarine
67,219 User Benchmarks
Best Bench: 90% Base clock 3.3 GHz, turbo 5 GHz (avg)
Worst Bench: 52% Base clock 3.3 GHz, turbo 0.6 GHz (avg)
Poor: 52% Great: 90%
SPEED RANK: 126th / 1117
Gaming
Gaming 71%
Battleship
Desktop
Desktop 69%
Battle cruiser
Workstation
Workstation 43%
Speed boat
Effective Speed
Effective CPU Speed
109 % Much faster effective speed.
+54%
70.8 %
SC Mixed
Avg. Single Core Mixed Speed
138 Pts Much faster single-core speed.
+40%
98.3 Pts
QC Mixed
Avg. Quad Core Mixed Speed
527 Pts Much faster quad-core speed.
+44%
365 Pts
MC Mixed
Avg. Multi Core Mixed Speed
1094 Pts Hugely faster multi-core speed.
+193%
373 Pts
SC Mixed
OC Single Core Mixed Speed
155 Pts Faster OC single-core speed.
+29%
120 Pts
QC Mixed
OC Quad Core Mixed Speed
611 Pts Faster OC quad-core speed.
+29%
472 Pts
MC Mixed
OC Multi Core Mixed Speed
1242 Pts Hugely faster OC multi-core speed.
+161%
475 Pts
Market Share
Based on 9,730,417 CPUs tested.
Market Share
Market Share (trailing 30 days)
4.12 % Hugely higher market share.
+534%
0.65 %
Value
Value For Money
103 % Much better value.
+36%
75.4 %
User Rating
UBM User Rating
146 % Hugely more popular.
+128%
64 %
Price
Price (score)
$340 $246 Cheaper.
+27%
Age
Newest
9 Months Hugely more recent.
+90%
90 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
12 threads Hugely higher thread count.
+200%
4 threads
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+56%
32 nm
Base Clock
Base Clock Speed
3.7 GHz Slightly faster base frequency.
+12%
3.3 GHz
Turbo Clock
Turbo Clock Speed
4.7 GHz Faster turbo frequency.
+27%
3.7 GHz
SC Int
Single Core Integer Speed
151 Pts Faster single-core int speed.
+25%
121 Pts
SC Float
Single Core Floating Point Speed
160 Pts Much faster single-core fp speed.
+32%
121 Pts
QC Int
Quad Core Integer Speed
596 Pts Faster quad-core int speed.
+26%
474 Pts
QC Float
Quad Core Floating Point Speed
631 Pts Much faster quad-core fp speed.
+33%
475 Pts
MC Int
Multi Core Integer Speed
1147 Pts Hugely faster multi-core int speed.
+141%
476 Pts
MC Float
Multi Core Floating Point Speed
1323 Pts Hugely faster multi-core fp speed.
+177%
477 Pts
Series
CPU Architecture
Coffee Lake (2017) Sandy Bridge (2011)
Socket
Motherboard Socket
FCLGA1151 LGA1155
Graphics
Integrated Graphics
UHD 630 HD 3000
Launch Date
Launch Date
Q4'17 Q1'11
Cache
Cache
12 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
1.20 GHz 1.1 GHz
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡
Yes No
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 »
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The i7-8700K is Intel’s latest, top of the range, 8th generation Coffee Lake processor. Like Kaby Lake and Sky Lake before that, Coffee Lake is based on Intel’s 14nm architecture which has been slightly optimized on each iteration. Following AMD’s modus operandi, Intel has upped the cores and threads across the range of their CPUs. In previous generations, a 6-core processor would have been a high-end desk-top (HEDT) processor, however the i7-8700K is the first Intel CPU with 6 cores and 12 threads to be classified (and priced) as a mainstream consumer processor. Specifically, the i7-8700K features a base clock speed of 3.7 GHz which boosts to 4.7 GHz (4.5 GHz for the previous generation i7-7700k), 12MB of smart (L3) cache and 2 channels of DDR4 RAM. The majority of the performance improvements over the 7th generation stem from the higher core count which results in a 50% increase in multi-core speed between the i7-7700k and i7-8700k. A new motherboard will need to be factored into the budget when upgrading to the 8700K as it requires a new Intel Z370 chipset which has supposedly been designed to better deliver power to CPUs with a greater number of cores. Also available in this latest release of CPUs is the 6 core 6 thread i5-8600k which is a more rational option (around $100 cheaper) for the vast majority of users that don’t require hyper-threading. Sandy bridge owners can finally justify an upgrade but with the next iteration of AMD's Zen architecture just around the corner the CPU market will be a lot faster moving now that Intel, once again, has to compete. [Sep '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) July 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]

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Group Test Results

  • Best user rated - User sentiment trumps benchmarks for this comparison.
  • Fastest real world speed - Real World Speed measures performance for typical consumers.
  • Best value for money - Value for money is based on real world performance and price.
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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.

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  • - CPU tests include: integer, floating and string.
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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
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CPUGPUSSD
Intel Core i7-8700K $340Nvidia GTX 1070 $400Samsung 850 Evo 250GB $85
AMD Ryzen 5 1600 $160Nvidia GTX 1060-6GB $290Samsung 850 Evo 500GB $121
Intel Core i5-8600K $225AMD RX 480 $280Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $160SanDisk Extreme 64GB $44
Seagate Barracuda 3TB (2016) $80G.SKILL Trident Z DDR4 3200 C14 4x16GB $951SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $59HyperX Fury DDR4 2133 C14 2x8GB $219SanDisk Ultra Fit 32GB $12
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