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IntelBX80677I77740X
IntelBX80684I58600
▲ 53240 ▼

4 Cores, 8 Threads @4.30 GHz, Kaby Lake.
Release date ≈ Q3 2017.

VS
▲ 54562 ▼

6 Cores, 6 Threads @3.10 GHz, Coffee Lake.
Release date ≈ Q2 2018.

Effective Speed 
+1%
Real World Speed
Performance profile from 23,335 user samples
Benchmark your CPU here
5,094 User Benchmarks
Best Bench: 96% Base clock 4.3 GHz, turbo 5.15 GHz (avg)
Worst Bench: 74% Base clock 4.3 GHz, turbo 1 GHz (avg)
Poor: 74% Great: 96%
SPEED RANK: 168th / 1451
Gaming
Gaming 87%
Aircraft carrier
Desktop
Desktop 91%
Nuclear submarine
Workstation
Workstation 74%
Battleship
18,241 User Benchmarks
Best Bench: 95% Base clock 3.1 GHz, turbo 4.1 GHz (avg)
Worst Bench: 73% Base clock 3.1 GHz, turbo 1.6 GHz (avg)
Poor: 73% Great: 95%
SPEED RANK: 156th / 1451
Gaming
Gaming 88%
Aircraft carrier
Desktop
Desktop 89%
Aircraft carrier
Workstation
Workstation 73%
Battleship
Effective Speed
Effective CPU Speed 		87 % 88.2 % +1%
Average Score 
+2%
Memory
Avg. Memory Latency 		90.5 Pts +3% 87.7 Pts
1-Core
Avg. Single Core Speed 		133 Pts Slightly faster single-core speed.
+6% 		125 Pts
2-Core
Avg. Dual Core Speed 		252 Pts +2% 248 Pts
4-Core
Avg. Quad Core Speed 		451 Pts 484 Pts Slightly faster quad-core speed.
+7%
8-Core
Avg. Octa Core Speed 		699 Pts Slightly faster octa-core speed.
+6% 		658 Pts
Overclocked Score 
+8%
Memory
OC Memory Latency 		96.7 Pts +1% 95.3 Pts
1-Core
OC Single Core Speed 		151 Pts Faster OC single-core speed.
+14% 		132 Pts
2-Core
OC Dual Core Speed 		293 Pts Faster OC dual-core speed.
+12% 		262 Pts
4-Core
OC Quad Core Speed 		532 Pts +3% 517 Pts
8-Core
OC Octa Core Speed 		819 Pts Slightly faster OC octa-core speed.
+7% 		765 Pts
Value & Sentiment 
+15%
Market Share
Based on 68,073,409 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.04 % 0.08 % Hugely higher market share.
+100%
Value
Value For Money 		107 % Slightly better value.
+10% 		97.9 %
User Rating
UBM User Rating 		53 % 54 % +2%
Price
Price (score) 		$130 Much cheaper.
+32% 		$190
Nice To Haves 
+1%
Age
Newest 		83+ Months 74+ Months More recent.
+11%
64-Core
OC Multi Core Speed 		824 Pts Slightly faster OC 64-core speed.
+8% 		764 Pts
64-Core
Avg. Multi Core Speed 		710 Pts Slightly faster 64-core speed.
+5% 		674 Pts
Specifications 
Launch Date
Launch Date 		Q2'17 Q2'18
Cache
Cache 		8 MB 9 MB SmartCache
Instruction Set Extensions
Instruction Set Extensions 		SSE4.1/4.2, AVX2 Intel® SSE4.1, Intel® SSE4.2, Intel® AVX2
Recommended Price
Recommended Customer Price 		$339.00 - $350.00 $213.00 - $224.00
Max Turbo Frequency
Max Turbo Frequency 		4.50 GHz 4.30 GHz
Thermal Solution Specification
Thermal Solution Specification 		PCG 2017X PCG 2015C (65W)
Processor Graphics
Processor Graphics ‡ 		None Intel® UHD Graphics 630
Hyper-Threading Tech
Intel® Hyper-Threading Technology ‡ 		Yes No

More specs » More specs »
Conclusion 
Average Bench 87%
Average Bench 88.2%
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Kaby Lake-X CPUs is probably one of the Intel's most embarrassing release ever for their HEDT platform. Requires X299 motherboard and only offered 16 PCIe lanes whilst being only little better than i7-7700K. [Oct '19 ColdSpy]

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Incredible performance for the $. Hard to justify going to an i7.  [Sep '18 GeneralDylan]

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