IntelBX80684I58400
AMDFD8350FRHKBOX

6 Cores, 6 Threads @2.8GHz, Coffee Lake.
Release date: Q4 2017.

8 Cores, 8 Threads @4.0GHz, Piledriver.
Release date: Q4 2012.

Real World Speed
Performance profile from 625,416 user samples
312,220 User Benchmarks
Best Bench: 89% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Worst Bench: 61% Base clock 2.8 GHz, turbo 0.8 GHz (avg)
Poor: 61% Great: 89%
SPEED RANK: 212th / 1442
Gaming
Gaming 82%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
313,196 User Benchmarks
Best Bench: 68% Base clock 4.75 GHz, turbo 4.7 GHz (avg)
Worst Bench: 48% Base clock 4 GHz, turbo 1.55 GHz (avg)
Poor: 48% Great: 68%
SPEED RANK: 568th / 1442
Gaming
Gaming 61%
Destroyer
Desktop
Desktop 63%
Destroyer
Workstation
Workstation 47%
Yacht
Effective Speed
Effective CPU Speed
81.8 % Much faster effective speed.
+35%
60.8 %
Memory
Avg. Memory Latency
84.9 Pts +5% 81 Pts
1-Core
Avg. Single Core Speed
113 Pts Much faster single-core speed.
+76%
64.3 Pts
2-Core
Avg. Dual Core Speed
224 Pts Hugely faster dual-core speed.
+84%
122 Pts
4-Core
Avg. Quad Core Speed
434 Pts Hugely faster quad-core speed.
+96%
221 Pts
8-Core
Avg. Octa Core Speed
564 Pts Much faster octa-core speed.
+65%
341 Pts
Memory
OC Memory Latency
94.2 Pts +3% 91.8 Pts
1-Core
OC Single Core Speed
120 Pts Much faster OC single-core speed.
+64%
73.3 Pts
2-Core
OC Dual Core Speed
237 Pts Much faster OC dual-core speed.
+66%
143 Pts
4-Core
OC Quad Core Speed
471 Pts Hugely faster OC quad-core speed.
+85%
254 Pts
8-Core
OC Octa Core Speed
657 Pts Much faster OC octa-core speed.
+65%
397 Pts
Market Share
Based on 67,719,590 CPUs tested
Market Share
Market Share (trailing 30 days)
0.94 % Insanely higher market share.
+3,033%
0.03 %
Value
Value For Money
101 % Much better value.
+34%
74.9 %
User Rating
UBM User Rating
61 % Slightly more popular.
+7%
57 %
Price
Price (score)
$131 $130 +1%
Age
Newest
78 Months Much more recent.
+43%
138 Months
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+48%
125 Watts
Cores
CPU Processing Cores
6 cores 8 cores Much higher core count.
+33%
Threads
CPU Processing Threads
6 threads 8 threads Much higher thread count.
+33%
Lithography
Manufacturing process
14 nm Much newer manufacturing.
+56%
32 nm
Base Clock
Base Clock Speed
2.8 GHz 4 GHz Much faster base frequency.
+43%
Turbo Clock
Turbo Clock Speed
4 GHz 4.2 GHz +5%
64-Core
OC Multi Core Speed
675 Pts Much faster OC 64-core speed.
+64%
411 Pts
64-Core
Avg. Multi Core Speed
588 Pts Much faster 64-core speed.
+67%
353 Pts
Series
CPU Architecture
Coffee Lake Piledriver
Socket
Motherboard Socket
FCLGA1151 AM3+
Graphics
Integrated Graphics
UHD 630 None
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The i5-8400 is a competitively priced hex-core processor from Intel’s 8th generation of Core processors (Coffee Lake). Along with the release of the unlocked i5-8600K, this is the first time that six-core processors have featured in the i5 line-up. Like the other Coffee Lake processors, the i5-8400 is based upon an improved version of Intel’s 14nm architecture which featured in both Skylake and Kaby Lake. Early benchmarks reveal that for average quad core usage (most games employ a maximum of four cores) the i5-8400 performs way above its pay grade. It achieves quad core mixed speeds close to Intel’s outgoing 2017 flagship the $300, quad-core, 8 thread i7-7700k, which to date has been a strong favourite for high-end gaming setups. On paper, the i5-8400 has a base clock of 2.8 GHz (Intel are significantly downplaying the performance of this SKU by giving it a relatively low nominal base clock), an all core boost of 3.8 GHz (this is the effective base clock figure that counts) and a single core boost of 4 GHz. This compares reasonably well to the i5-8600K which has a base clock of 3.6 GHz, all core boost of 4.1 GHz and a single core boost of 4.3 GHz. The i5-8400 also features 9MB of L3 cache and an energy-thrifty TDP of 65W. Priced at under $190, the i5-8400 offers fantastic value for money. Unfortunately, like the other Coffee Lake processors, the i5-8400 will require a new 300 series motherboard, and at the time of writing, the only available version is Intel’s high-end Z370 which isn't an ideal pairing for the i5-8400. The Z series motherboards are designed to cater for the unlocked and overclockable "K" SKUs. Cheaper 300 series motherboards will be available in 2018 at which time the 8400 will offer even better value for money. [Oct '17 CPUPro]

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In terms of raw single-core performance the flagship AMD FX-8350 is lagging behind intel's processor line-up by over two generations. The PassMark Single Thread scores for the i5-2500K vs the FX-8350 are 1863 to 1520 which shows that in terms of raw per-core processing the FX-8350 is lagging the two year old i5 by 23%. Where the AMD FX makes up is on multi-core performance, with a score of 9156 vs 6745, the AMD leads the Intel 2500K by 36% making it the far more capable multi-threaded server orientated performer. The 8350 is also cheaper but significantly more power hungry which counts strongly against it as a server proposition. The FX-8350 could be a good fit for specific server use cases but for general consumer use, which is single and dual core intensive, Intel's two year old i5-2500K delivers better performance. [May '13 CPUPro]

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Processor Rankings (Price vs Performance) April 2024 CPU Rankings

We calculate effective speed which measures real world performance for typical users. Effective speed is adjusted by current prices to yield a value for money rating. 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.
  • 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.
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 Frequently Asked Questions

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CPUGPUSSD
Intel Core i5-13600K $279Nvidia RTX 4060 $300Crucial MX500 250GB $40
Intel Core i5-12400F $133Nvidia RTX 4060-Ti $385Samsung 850 Evo 120GB $80
Intel Core i5-12600K $182Nvidia RTX 4070 $409Samsung 860 Evo 250GB $52
HDDRAMUSB
Seagate Barracuda 1TB (2016) $39Corsair Vengeance LPX DDR4 3200 C16 2x8GB $40SanDisk Extreme 64GB $72
WD Blue 1TB (2012) $30Corsair Vengeance LPX DDR4 3000 C15 2x8GB $43SanDisk Extreme 32GB $28
Seagate Barracuda 2TB (2016) $51G.SKILL Trident Z DDR4 3200 C14 4x16GB $351SanDisk Ultra Fit 32GB $16
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