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IntelBX80684I58400
IntelBX8071512600K

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

10 Cores, 16 Threads @3.7GHz, Alder Lake.
Release date: Q4 2021.

Real World Speed
Performance profile from 413,783 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: 231st / 1468
Gaming
Gaming 82%
Aircraft carrier
Desktop
Desktop 83%
Aircraft carrier
Workstation
Workstation 66%
Battle cruiser
101,563 User Benchmarks
Best Bench: 117% Base clock 3.7 GHz, turbo 5 GHz (avg)
Worst Bench: 100% Base clock 3.7 GHz, turbo 2.35 GHz (avg)
Poor: 100% Great: 117%
SPEED RANK: 58th / 1468
Gaming
Gaming 109%
UFO
Desktop
Desktop 110%
UFO
Workstation
Workstation 111%
UFO
Effective Speed
Effective CPU Speed
81.8 % 109 % Much faster effective speed.
+33%
Memory
Avg. Memory Latency
84.9 Pts Slightly lower memory latency.
+6%
80 Pts
1-Core
Avg. Single Core Speed
113 Pts 194 Pts Much faster single-core speed.
+72%
2-Core
Avg. Dual Core Speed
224 Pts 382 Pts Much faster dual-core speed.
+71%
4-Core
Avg. Quad Core Speed
434 Pts 736 Pts Much faster quad-core speed.
+70%
8-Core
Avg. Octa Core Speed
564 Pts 1,223 Pts Hugely faster octa-core speed.
+117%
Memory
OC Memory Latency
94.2 Pts +3% 91.1 Pts
1-Core
OC Single Core Speed
120 Pts 207 Pts Much faster OC single-core speed.
+72%
2-Core
OC Dual Core Speed
237 Pts 416 Pts Much faster OC dual-core speed.
+76%
4-Core
OC Quad Core Speed
471 Pts 813 Pts Much faster OC quad-core speed.
+73%
8-Core
OC Octa Core Speed
657 Pts 1,367 Pts Hugely faster OC octa-core speed.
+108%
Market Share
Based on 69,051,341 CPUs tested
Market Share
Market Share (trailing 30 days)
0.86 % Slightly higher market share.
+8%
0.8 %
Value
Value For Money
104 % 128 % Better value.
+22%
User Rating
UBM User Rating
62 % 96 % Much more popular.
+55%
Price
Price (score)
$115 Cheaper.
+26%
$155
Age
Newest
85 Months 36 Months Much more recent.
+58%
TDP
Thermal Design Power (TDP)
65 Watts Much more energy efficient.
+48%
125 Watts
Cores
CPU Processing Cores
6 cores 10 cores Much higher core count.
+67%
Threads
CPU Processing Threads
6 threads 16 threads Hugely higher thread count.
+167%
Lithography
Manufacturing process
14 nm 10 nm Newer manufacturing.
+29%
Base Clock
Base Clock Speed
2.8 GHz 3.7 GHz Much faster base frequency.
+32%
Turbo Clock
Turbo Clock Speed
4 GHz 4.9 GHz Faster turbo frequency.
+23%
64-Core
OC Multi Core Speed
675 Pts 1,926 Pts Hugely faster OC 64-core speed.
+185%
64-Core
Avg. Multi Core Speed
588 Pts 1,743 Pts Hugely faster 64-core speed.
+196%
Series
CPU Architecture
Coffee Lake Alder Lake
Socket
Motherboard Socket
FCLGA1151 FCLGA1700
Graphics
Integrated Graphics
UHD 630 UHD 770

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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Intel’s latest 10-core i5-12600K Alder Lake desktop processor offers an impressive 50% 64-core performance improvement over it's predecessor. The 12600K combines six hyper-threaded Golden Cove P-cores with clock speeds up to 4.9 GHz and four energy efficient Gracemont E-cores for a total of 16 threads. Alder Lake CPUs have a new LGA 1700 socket which requires new cooler brackets and a new Z690 motherboard. Z690 brings several new features including PCIe 5.0 and DDR5 memory. Most Z690 boards will ship in both DDR4 and DDR5 variants. DDR4 is likely the better option, at least until DDR5 prices settle. With an MRSP of just $290 USD, the 12600K is both cheaper and faster than the competition in both single and, notably, multi-core performance. As a result, even AMD's prolific marketing infrastructure (youtube, reddit, forums etc.) will struggle to drive sales, at least until Zen 4 launches (est. late 2022). In the meantime, Intel's i5-12600K is the obvious choice for consumers that do not wish to pay over the odds for almost unparalleled performance in the majority of workloads including gaming. That said, gamers that already own a K series CPU from the 8th gen. or higher will see limited gains in the majority of titles when paired with a 3060 (or lower) tier GPU. In some cases (e.g. PUBG or Overwatch) gamers will see fewer frame drops by disabling the E-Cores all together. If recent history is a guide, stock levels at MSRP are likely to deplete rapidly. [Nov '21 CPUPro]

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Processor Rankings (Price vs Performance) November 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]

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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The Best
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