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Core i7-8700k


Description
The Core i7-8700k is a cpu manufactured by Intel that was released on October 2017. This model has 6 Coffee Lake-S cores with HyperThreading, runs at 3700 MHz as base frequency and has a a thermal design power of 95 W.

The i7-8700k has 6x32+6x32 kB of cache L1, 6x256 kB of cache L2 and 12288 kB of cache L3.

Coffee Lake is the second refinement of Intel’s 14nm (Tri-Gate) technology. While it uses LGA1151 socket, it is incompatible with previous generations due to electrical changes in socket’s pins so these CPUs require Z370 chipset. This kind of generation introduced more cores in every range to compete with new AMD’s architecture. Coffee Lake uses DDR4 memory at 2400MHz for i3 and at 2666MHz for i5, i7 CPUs plus iGPU frequency has been increased 50MHz with respect to previous generation.

Specs
Official name
Intel(R) Core(TM) i7-8700K CPU @ 3.70GHz
CPUID
906ea
Core
Coffee Lake-S
Architecture
Base frecuency
3.7 GHz
Boost frecuency
4.7 GHz
Socket
LGA 1151
Cores/Threads
6/12
TDP
95 W
Cache L1 (d+i)
6x32+6x32 kB
Cache L2
6x256 kB
Cache L3
12288 kB
Release date
October 2017

Non-optimized benchmark
The benchmark in Mode 0 (FPU) measures cpu performance with non-optimized software. It uses the basic µinstructions from the i386 architecture with the i387 floating point unit. This mode is compatible with all CPUs so it's practical to compare very different CPUs
Monothread
Multithread
Test#1 (Integers)
4127
24011 (x5.8)
Test#2 (FP)
16959
108690 (x6.4)
Test#3 (Generic, ZIP)
5564
36616 (x6.6)
Test#1 (Memory)
12845
9327 (x0.7)
TOTAL
39495
178644 (x4.5)

SSE3 optimized benchmark
The benchmark in mode I (SSE) is optimized for the use of SIMD instructions with 128 bits register and the SSE set up to version 3. Nearly every modern CPU has support for this mode.
Monothread
Multithread
Test#1 (Integers)
12920
94259 (x7.3)
Test#2 (FP)
20678
152549 (x7.4)
Test#3 (Generic, ZIP)
5295
39735 (x7.5)
Test#1 (Memory)
12587
8527 (x0.7)
TOTAL
51480
295071 (x5.7)

AVX optimized benchmark
The benchmark in mode II (AVX) is optimized to used 256 bits registers beside the first version of the Advanced Vector Extensions (AVX). The first AVX compatible CPU was released in 2011.
Monothread
Multithread
Test#1 (Integers)
16874
105740 (x6.3)
Test#2 (FP)
26119
180520 (x6.9)
Test#3 (Generic, ZIP)
6329
44994 (x7.1)
Test#1 (Memory)
13708
8512 (x0.6)
TOTAL
63030
339766 (x5.4)

AVX2 optimized benchmark
The benchmark in mode III (AVX2), like AVX1, is optimized to used 256 bits registers beside the second version of the Advanced Vector Extensions (AVX). The first AVX2 compatible CPU was released in 2013.
Monothread
Multithread
Test#1 (Integers)
31204
202422 (x6.5)
Test#2 (FP)
27821
186332 (x6.7)
Test#3 (Generic, ZIP)
6568
44958 (x6.8)
Test#1 (Memory)
15004
10054 (x0.7)
TOTAL
80598
443765 (x5.5)

Overclocking
User
Frequency
Motherboard
1 Xevipiu
5808 MHz
ROG MAXIMUS X HERO
2 Xevipiu
5428 MHz
ROG MAXIMUS X HERO
3 Xevipiu
5418 MHz
ROG MAXIMUS X HERO
4 Magog
5280 MHz
ROG STRIX Z370-F GAMING
5 Magog
5078 MHz
ROG STRIX Z370-F GAMING

Monothread performance graph
Monothread performance graphics gives the performance vs time. They are useful to measure the time it takes to the CPU to reach the maximum performance.

Usually, CPU's performance will be steady during these tests but if it has a slow frequency strategy, the first samples will show a lower score.


Test#1 (Integers) [% vs time]

grafica bm.hardlimit.com


Test#2 (FP) [% vs time]

grafica bm.hardlimit.com


Test#3 (Generic, ZIP) [% vs time]

grafica bm.hardlimit.com


Test#1 (Memory) [% vs time]

grafica bm.hardlimit.com

Multithread performance graph
Multithread graphs measure the performance against a heavy load during certain time.

If CPU's TDP doesn't limit the frequency and the machine is properly cooled, performance should remain steady vs time. Otherwise, the performance score will oscillate or decrease over time.


Test#1 (Integers) [% vs time]

grafica bm.hardlimit.coma


Test#2 (FP) [% vs time]

grafica bm.hardlimit.coma


Test#3 (Generic, ZIP) [% vs time]

grafica bm.hardlimit.coma


Test#1 (Memory) [% vs time]

grafica bm.hardlimit.coma

Similar CPUs to Core i7-8700k
Intel Core i7-8700k (This model)
 Mode FPU monothread  [39495 points]
 Mode FPU multithread  [178644 points]
 Mode AVX2 monothread  [80598 points]
 Mode AVX2 multithread  [443765 points]
 Mode FPU monothread  [43929 points +11.23%]
 Mode FPU multithread  [176786 points -1.04%]
 Mode AVX2 monothread  [77751 points -3.53%]
 Mode AVX2 multithread  [372737 points -16.01%]
 Mode FPU monothread  [42117 points +6.64%]
 Mode FPU multithread  [202610 points +13.42%]
 Mode AVX2 monothread  [75823 points -5.92%]
 Mode AVX2 multithread  [403364 points -9.10%]
 Mode FPU monothread  [45532 points +15.29%]
 Mode FPU multithread  [266824 points +49.36%]
 Mode AVX2 monothread  [81908 points +1.63%]
 Mode AVX2 multithread  [529320 points +19.28%]
 Mode FPU monothread  [44898 points +13.68%]
 Mode FPU multithread  [240709 points +34.74%]
 Mode AVX2 monothread  [79200 points -1.73%]
 Mode AVX2 multithread  [487048 points +9.75%]
 Mode FPU monothread  [42820 points +8.42%]
 Mode FPU multithread  [191536 points +7.22%]
 Mode AVX2 monothread  [75271 points -6.61%]
 Mode AVX2 multithread  [387995 points -12.57%]
 Mode FPU monothread  [44041 points +11.51%]
 Mode FPU multithread  [178106 points -0.30%]
 Mode AVX2 monothread  [77340 points -4.04%]
 Mode AVX2 multithread  [371076 points -16.38%]
 Mode FPU monothread  [41261 points +4.47%]
 Mode FPU multithread  [191406 points +7.14%]
 Mode AVX2 monothread  [72104 points -10.54%]
 Mode AVX2 multithread  [378993 points -14.60%]
 Mode FPU monothread  [36318 points -8.04%]
 Mode FPU multithread  [145374 points -18.62%]
 Mode AVX2 monothread  [49236 points -38.91%]
 Mode AVX2 multithread  [289302 points -34.81%]
 Mode FPU monothread  [43698 points +10.64%]
 Mode FPU multithread  [143468 points -19.69%]
 Mode AVX2 monothread  [78572 points -2.51%]
 Mode AVX2 multithread  [292304 points -34.13%]
 Mode FPU monothread  [47242 points +19.61%]
 Mode FPU multithread  [134033 points -24.97%]
 Mode AVX2 monothread  [82100 points +1.86%]
 Mode AVX2 multithread  [251183 points -43.40%]
          
FPU mode comparison

Monothread integers operations
Model
Score
4145 [0.45%]
4145 [0.43%]
Intel Core i7-8700k
4127
This model
4010 [-2.83%]
3953 [-4.22%]

Multithread integers operations
Model
Score
25694 [7.01%]
24752 [3.09%]
Intel Core i7-8700k
24011
This model
22767 [-5.18%]
22681 [-5.54%]
20820 [-13.29%]
19466 [-18.93%]

Monothread floating point operations
Model
Score
17408 [2.65%]
17383 [2.50%]
17378 [2.47%]
16990 [0.18%]
Intel Core i7-8700k
16959
This model
16695 [-1.56%]
16421 [-3.17%]
16382 [-3.40%]

Multithread floating point operations
Model
Score
127917 [17.69%]
124941 [14.95%]
120476 [10.84%]
118158 [8.71%]
110107 [1.30%]
Intel Core i7-8700k
108690
This model
107946 [-0.69%]
103097 [-5.15%]
97876 [-9.95%]
97528 [-10.27%]
96586 [-11.14%]

Monothread generic test (Zip compression)
Model
Score
5770 [3.70%]
Intel Core i7-8700k
5564
This model
5462 [-1.84%]
5391 [-3.11%]
5338 [-4.05%]

Multithread generic test (Zip compression)
Model
Score
50999 [39.28%]
50126 [36.90%]
43233 [18.07%]
Intel Core i7-8700k
36616
This model
35340 [-3.49%]
34499 [-5.78%]
33068 [-9.69%]
32434 [-11.42%]
31652 [-13.56%]

Monothread memory performance
Model
Score
13453 [4.73%]
Intel Core i7-8700k
12845
This model
12627 [-1.70%]
12546 [-2.33%]
11981 [-6.73%]
11924 [-7.17%]

Multithread memory performance
Model
Score
Intel Core i7-8700k
9327
This model
          
SSE mode comparison

Monothread integers operations
Model
Score
13103 [1.42%]
Intel Core i7-8700k
12920
This model
12888 [-0.25%]
12856 [-0.50%]
12610 [-2.40%]

Multithread integers operations
Model
Score
116682 [23.79%]
100938 [7.09%]
96913 [2.81%]
Intel Core i7-8700k
94259
This model
93780 [-0.51%]
92792 [-1.56%]
92605 [-1.76%]
90443 [-4.05%]
87781 [-6.87%]

Monothread floating point operations
Model
Score
21941 [6.11%]
21686 [4.87%]
20702 [0.12%]
Intel Core i7-8700k
20678
This model
20589 [-0.43%]
20546 [-0.64%]
20026 [-3.15%]

Multithread floating point operations
Model
Score
225245 [47.65%]
204758 [34.22%]
195062 [27.87%]
187278 [22.77%]
159085 [4.28%]
Intel Core i7-8700k
152549
This model
149096 [-2.26%]
147675 [-3.20%]
137300 [-10.00%]
135127 [-11.42%]
135120 [-11.43%]

Monothread generic test (Zip compression)
Model
Score
5331 [0.67%]
Intel Core i7-8700k
5295
This model

Multithread generic test (Zip compression)
Model
Score
61736 [55.37%]
55741 [40.28%]
51518 [29.65%]
43615 [9.76%]
Intel Core i7-8700k
39735
This model
39675 [-0.15%]
36927 [-7.07%]
36047 [-9.28%]
33851 [-14.81%]
33629 [-15.37%]

Monothread memory performance
Model
Score
13435 [6.74%]
12792 [1.63%]
Intel Core i7-8700k
12587
This model
12491 [-0.76%]
12175 [-3.27%]
11366 [-9.69%]
11087 [-11.91%]
10811 [-14.10%]

Multithread memory performance
Model
Score
10638 [24.76%]
9770 [14.57%]
Intel Core i7-8700k
8527
This model
8426 [-1.19%]
          
AVX mode comparison

Monothread integers operations
Model
Score
16954 [0.48%]
Intel Core i7-8700k
16874
This model
16756 [-0.69%]
16747 [-0.75%]
16712 [-0.96%]
16711 [-0.96%]
16574 [-1.78%]

Multithread integers operations
Model
Score
130881 [23.78%]
122006 [15.38%]
120586 [14.04%]
119500 [13.01%]
117028 [10.67%]
Intel Core i7-8700k
105740
This model
102112 [-3.43%]
101852 [-3.68%]
97370 [-7.92%]
96034 [-9.18%]
95513 [-9.67%]

Monothread floating point operations
Model
Score
Intel Core i7-8700k
26119
This model
25517 [-2.30%]
25497 [-2.38%]
25455 [-2.54%]
25439 [-2.60%]
25369 [-2.87%]

Multithread floating point operations
Model
Score
208498 [15.50%]
199876 [10.72%]
198786 [10.12%]
198512 [9.97%]
197339 [9.32%]
Intel Core i7-8700k
180520
This model
170305 [-5.66%]
158705 [-12.08%]
156504 [-13.30%]
154424 [-14.46%]
144762 [-19.81%]

Monothread generic test (Zip compression)
Model
Score
Intel Core i7-8700k
6329
This model
6014 [-4.98%]

Multithread generic test (Zip compression)
Model
Score
59748 [32.79%]
56829 [26.30%]
54429 [20.97%]
54122 [20.29%]
50641 [12.55%]
Intel Core i7-8700k
44994
This model
43124 [-4.16%]
42593 [-5.34%]
39839 [-11.46%]
38759 [-13.86%]

Monothread memory performance
Model
Score
17516 [27.78%]
16611 [21.18%]
14723 [7.40%]
Intel Core i7-8700k
13708
This model
13640 [-0.50%]
13600 [-0.79%]
13327 [-2.79%]
13250 [-3.34%]
13195 [-3.74%]

Multithread memory performance
Model
Score
9659 [13.48%]
Intel Core i7-8700k
8512
This model
          
AVX2 mode comparison

Monothread integers operations
Model
Score
35124 [12.56%]
Intel Core i7-8700k
31204
This model
31156 [-0.15%]
30834 [-1.19%]
30642 [-1.80%]
30521 [-2.19%]

Multithread integers operations
Model
Score
238676 [17.91%]
229408 [13.33%]
216184 [6.80%]
Intel Core i7-8700k
202422
This model
187904 [-7.17%]
187430 [-7.41%]
186771 [-7.73%]
184187 [-9.01%]
179925 [-11.11%]

Monothread floating point operations
Model
Score
Intel Core i7-8700k
27821
This model
27440 [-1.37%]
27277 [-1.96%]
27205 [-2.21%]
26801 [-3.67%]

Multithread floating point operations
Model
Score
201470 [8.12%]
200559 [7.64%]
192459 [3.29%]
Intel Core i7-8700k
186332
This model
184495 [-0.99%]
184417 [-1.03%]
181197 [-2.76%]
169162 [-9.21%]
167572 [-10.07%]

Monothread generic test (Zip compression)
Model
Score
Intel Core i7-8700k
6568
This model

Multithread generic test (Zip compression)
Model
Score
51574 [14.72%]
46582 [3.61%]
Intel Core i7-8700k
44958
This model
43104 [-4.12%]
40049 [-10.92%]
39943 [-11.16%]
39451 [-12.25%]
39354 [-12.46%]

Monothread memory performance
Model
Score
15862 [5.72%]
15440 [2.90%]
Intel Core i7-8700k
15004
This model
14978 [-0.18%]
14456 [-3.65%]
14366 [-4.25%]
14171 [-5.55%]
14028 [-6.51%]

Multithread memory performance
Model
Score
11262 [12.02%]
10675 [6.18%]
Intel Core i7-8700k
10054
This model

Hardlimit Benchmark Central - Ver. 3.7.9