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 116,305 user samples
59,004 User Benchmarks
Best Bench: 126% Base clock 3.7 GHz, turbo 5.05 GHz (avg)
Worst Bench: 94% Base clock 3.7 GHz, turbo 1.75 GHz (avg)
Poor: 94% Great: 126%
SPEED RANK: 6th / 1100
Gaming
Gaming 111%
UFO
Desktop
Desktop 107%
UFO
Workstation
Workstation 97%
Nuclear submarine
57,301 User Benchmarks
Best Bench: 91% Base clock 3.45 GHz
Worst Bench: 51% Base clock 3.6 GHz, turbo 0.55 GHz (avg)
Poor: 51% Great: 91%
SPEED RANK: 113th / 1100
Gaming
Gaming 72%
Battleship
Desktop
Desktop 70%
Battleship
Workstation
Workstation 44%
Speed boat
Effective Speed
Effective CPU Speed
111 % Much faster effective speed.
+54%
71.8 %
SC Mixed
Avg. Single Core Mixed Speed
140 Pts Much faster single-core speed.
+40%
99.7 Pts
QC Mixed
Avg. Quad Core Mixed Speed
539 Pts Much faster quad-core speed.
+45%
371 Pts
MC Mixed
Avg. Multi Core Mixed Speed
1098 Pts Hugely faster multi-core speed.
+190%
378 Pts
SC Mixed
OC Single Core Mixed Speed
157 Pts Faster OC single-core speed.
+30%
121 Pts
QC Mixed
OC Quad Core Mixed Speed
624 Pts Much faster OC quad-core speed.
+30%
479 Pts
MC Mixed
OC Multi Core Mixed Speed
1256 Pts Hugely faster OC multi-core speed.
+162%
480 Pts
Market Share
Based on 8,458,766 CPUs tested.
Market Share
Market Share (trailing 30 days)
4.02 % Hugely higher market share.
+518%
0.65 %
Value
Value For Money
106 % Much better value.
+38%
76.5 %
User Rating
UBM User Rating
143 % Hugely more popular.
+83%
78 %
Price
Price (score)
$330 $246 Cheaper.
+25%
Age
Newest
6 Months Hugely more recent.
+93%
87 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
154 Pts Faster single-core int speed.
+27%
121 Pts
SC Float
Single Core Floating Point Speed
160 Pts Much faster single-core fp speed.
+31%
122 Pts
QC Int
Quad Core Integer Speed
612 Pts Faster quad-core int speed.
+28%
480 Pts
QC Float
Quad Core Floating Point Speed
637 Pts Much faster quad-core fp speed.
+33%
480 Pts
MC Int
Multi Core Integer Speed
1156 Pts Hugely faster multi-core int speed.
+140%
482 Pts
MC Float
Multi Core Floating Point Speed
1329 Pts Hugely faster multi-core fp speed.
+175%
483 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) April 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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  • - RAM tests include: single/multi core bandwidth and latency.
  • - Reports are generated and presented on userbenchmark.com.
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 Frequently Asked Questions

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CPUGPUSSD
Intel Core i7-8700K $330Nvidia GTX 1070 $447Samsung 850 Evo 250GB $90
Intel Core i7-7700K $290Nvidia GTX 1060-6GB $300Samsung 850 Evo 500GB $137
AMD Ryzen 5 1600 $176AMD RX 480 $350Samsung 850 Pro 256GB $163
HDDRAMUSB
Seagate Barracuda 1TB (2016) $44Corsair Vengeance LPX DDR4 3000 C15 2x8GB $183SanDisk Extreme 64GB $70
Seagate Barracuda 3TB (2016) $75G.SKILL Trident Z DDR4 3200 C14 4x16GB $957SanDisk Extreme 32GB $46
Seagate Barracuda 2TB (2016) $60Corsair Vengeance LPX DDR4 3200 C16 2x8GB $193SanDisk Ultra Fit 32GB $12
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