IntelBX80623I72600K
IntelBX80684I58400

4 Cores, 8 Threads @3.4GHz, Sandy Bridge.
Release date: Q1 2011.

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

Real World Speed
Performance profile from 108,706 user samples
57,465 User Benchmarks
Best Bench: 86% Base clock 3.4 GHz
Worst Bench: 53% Base clock 3.7 GHz, turbo 0.4 GHz (avg)
Poor: 53% Great: 86%
SPEED RANK: 163rd / 1143
Gaming
Gaming 68%
Battle cruiser
Desktop
Desktop 70%
Battleship
Workstation
Workstation 50%
Yacht
51,241 User Benchmarks
Best Bench: 94% Base clock 2.8 GHz, turbo 3.85 GHz (avg)
Worst Bench: 82% Base clock 2.8 GHz, turbo 3.8 GHz (avg)
Poor: 82% Great: 94%
SPEED RANK: 43rd / 1143
Gaming
Gaming 89%
Aircraft carrier
Desktop
Desktop 86%
Aircraft carrier
Workstation
Workstation 64%
Destroyer
Effective Speed
Effective CPU Speed
68.5 % 89.1 % Much faster effective speed.
+30%
SC Mixed
Avg. Single Core Mixed Speed
99.3 Pts 117 Pts Faster single-core speed.
+18%
QC Mixed
Avg. Quad Core Mixed Speed
331 Pts 452 Pts Much faster quad-core speed.
+37%
MC Mixed
Avg. Multi Core Mixed Speed
498 Pts 651 Pts Much faster multi-core speed.
+31%
SC Mixed
OC Single Core Mixed Speed
121 Pts 122 Pts +1%
QC Mixed
OC Quad Core Mixed Speed
436 Pts 477 Pts Slightly faster OC quad-core speed.
+9%
MC Mixed
OC Multi Core Mixed Speed
612 Pts 701 Pts Slightly faster OC multi-core speed.
+15%
Market Share
Based on 12,814,466 CPUs tested.
Market Share
Market Share (trailing 30 days)
0.54 % 1.21 % Hugely higher market share.
+124%
Value
Value For Money
59.2 % 99 % Much better value.
+67%
User Rating
UBM User Rating
68 % 115 % Much more popular.
+69%
Price
Price (score)
$429 $220 Much cheaper.
+49%
Age
Newest
95 Months 14 Months Hugely more recent.
+85%
TDP
Thermal Design Power (TDP)
95 Watts 65 Watts Much more energy efficient.
+32%
Cores
CPU Processing Cores
4 cores 6 cores Much higher core count.
+50%
Threads
CPU Processing Threads
8 threads Much higher thread count.
+33%
6 threads
Lithography
Manufacturing process
32 nm 14 nm Much newer manufacturing.
+56%
Base Clock
Base Clock Speed
3.4 GHz Faster base frequency.
+21%
2.8 GHz
Turbo Clock
Turbo Clock Speed
3.8 GHz 4 GHz Slightly faster turbo frequency.
+5%
SC Int
Single Core Integer Speed
121 Pts +3% 118 Pts
SC Float
Single Core Floating Point Speed
121 Pts 128 Pts Slightly faster single-core fp speed.
+6%
QC Int
Quad Core Integer Speed
433 Pts 461 Pts Slightly faster quad-core int speed.
+6%
QC Float
Quad Core Floating Point Speed
441 Pts 500 Pts Slightly faster quad-core fp speed.
+13%
MC Int
Multi Core Integer Speed
588 Pts 673 Pts Slightly faster multi-core int speed.
+14%
MC Float
Multi Core Floating Point Speed
608 Pts 740 Pts Faster multi-core fp speed.
+22%
Series
CPU Architecture
Sandy Bridge Coffee Lake
Socket
Motherboard Socket
LGA1155 FCLGA1151
Graphics
Integrated Graphics
HD 3000 UHD 630
Launch Date
Launch Date
Q1'11 Q4'17
Cache
Cache
8 MB SmartCache 9 MB
Instruction Set Extensions
Instruction Set Extensions
SSE4.1/4.2, AVX SSE4.1/4.2, AVX2
Lithography
Lithography
32 nm 14 nm
Bus Speed
Bus Speed
5 GT/s DMI 8 GT/s DMI3
Max Memory Size
Max Memory Size (dependent on memory type)
32 GB 64 GB
Memory Types
Memory Types
DDR3 1066/1333 DDR4-2666
Processor Graphics
Processor Graphics ‡
Intel® HD Graphics 3000 Intel® UHD Graphics 630
Graphics Base Frequency
Graphics Base Frequency
850 MHz 350 MHz
# of Displays Supported
# of Displays Supported ‡
2 3
Graphics Max Dynamic Frequency
Graphics Max Dynamic Frequency
1.35 GHz 1.05 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) ‡
No Yes
PCI Express Revision
PCI Express Revision
2.0 3.0

More specs » More specs »
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The i7-2600K Sandy Bridge processor is two generations old and nearly three years out of date. The numerous owners of this superb processor should feel in no hurry to upgrade as it's still one of the fastest consumer processors, even by today's standards. The benchmark figures indicate that in terms of real-world performance this processor is only 5% slower than the third generation Ivy Bridge i7-3770K, not bad considering its age. That said new buyers will find both better energy efficiency and marginal performance improvements elsewhere[Feb '12 CPUPro]

MORE DETAILS

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]

MORE DETAILS

Processor Rankings (Price vs Performance) December 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.
  • 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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HDDRAMUSB
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