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IntelBX80648I75820K
AMD100-100000651WOF
▲ 669,881 ▼

6 Cores, 12 Threads @3.3GHz, Haswell-E.
Release date: Q3 2014.

VS
Effective Speed 
+36%
Real World Speed
Performance profile from 124,942 user samples
Benchmark your CPU here
101,694 User Benchmarks
Best Bench: 88% Base clock 3.3 GHz, turbo 4.6 GHz (avg)
Worst Bench: 68% Base clock 3.3 GHz, turbo 1.2 GHz (avg)
Poor: 68% Great: 88%
SPEED RANK: 301st / 1468
Gaming
Gaming 77%
Battleship
Desktop
Desktop 78%
Battleship
Workstation
Workstation 67%
Battle cruiser
23,248 User Benchmarks
Great bench: 111% Base clock 3.4 GHz, turbo 4.4 GHz (avg)
Poor bench: 91% Base clock 3.4 GHz, turbo 3.4 GHz (avg)
Poor: 91% Great: 111%
SPEED RANK: 74th / 1468
Gaming
Gaming 104%
UFO
Desktop
Desktop 105%
UFO
Workstation
Workstation 102%
UFO
Effective Speed
Effective CPU Speed 		76.8 % 104 % Much faster effective speed.
+36%
Average Score 
+57%
Memory
Avg. Memory Latency 		86.4 Pts 95.5 Pts Lower memory latency.
+11%
1-Core
Avg. Single Core Speed 		96.3 Pts 158 Pts Much faster single-core speed.
+64%
2-Core
Avg. Dual Core Speed 		192 Pts 313 Pts Much faster dual-core speed.
+63%
4-Core
Avg. Quad Core Speed 		364 Pts 606 Pts Much faster quad-core speed.
+66%
8-Core
Avg. Octa Core Speed 		594 Pts 1,088 Pts Hugely faster octa-core speed.
+83%
Overclocked Score 
+40%
Memory
OC Memory Latency 		94 Pts 99.5 Pts Slightly lower OC memory latency.
+6%
1-Core
OC Single Core Speed 		120 Pts 166 Pts Much faster OC single-core speed.
+38%
2-Core
OC Dual Core Speed 		237 Pts 331 Pts Much faster OC dual-core speed.
+40%
4-Core
OC Quad Core Speed 		462 Pts 656 Pts Much faster OC quad-core speed.
+42%
8-Core
OC Octa Core Speed 		737 Pts 1,267 Pts Much faster OC octa-core speed.
+72%
Value & Sentiment 
+28%
Market Share
Based on 69,053,574 CPUs tested
See market share leaders
Market Share
Market Share (trailing 30 days) 		0.12 % 0.32 % Hugely higher market share.
+167%
Value
Value For Money 		94.7 % 101 % Slightly better value.
+7%
User Rating
UBM User Rating 		66 % +3% 64 %
Price
Price (score) 		$130 Much cheaper.
+58% 		$309
Nice To Haves 
+77%
Age
Newest 		123 Months 31+ Months Much more recent.
+75%
64-Core
OC Multi Core Speed 		933 Pts 1,547 Pts Much faster OC 64-core speed.
+66%
64-Core
Avg. Multi Core Speed 		748 Pts 1,432 Pts Hugely faster 64-core speed.
+91%
Conclusion 
Average Bench 76.8%
Average Bench 104%

The Intel Core i7-5820K is the cheapest of three (5820K,5930K,5960X) new Haswell-E prosumer/enthusiast processors. The 5820K sports six physical cores and twelve threads which allow for enormous processing throughput. Unfortunately Intel have somewhat handicapped the 5820K by setting its base clock at just 3.3 GHz, 0.7GHz lower than the class leading 4790K. Comparing the 4790K and 5820K shows that the cheaper i7-4790K is significantly faster at both single and dual threaded workloads. The additional two cores found in the 5820K are not relevant to general computing and as such the 5820K probably makes a better server rather than consumer proposition. The Haswell-E X99 architecture also requires DDR4 RAM which is currently far more expensive than DDR3. Overall the 5820K is a very expensive option and probably best avoided by the vast majority of consumers.  [Sep '14 CPUPro]

MORE DETAILS

The 5800X3D has the same core architecture as the 5800X but it runs at 11% lower base and 4% lower boost clocks. The lower clocks are in exchange for an extra 64MB of cache (96MB up from 32MB) and around 40% more money. For most real-world tasks performance is comparable to the 5800X. Cache sensitive scenarios such as low res. canned game benchmarks with a 3090-Ti ($2,000 USD) benefit at the cost of everything else. Be wary of sponsored reviews with cherry picked games that showcase the wins, conveniently ignore frame drops and gloss over the losses. Also watch out for AMD’s army of Neanderthal social media accounts on reddit, forums and youtube, they will be singing their own praises as usual. Instead of focusing on real-world performance, AMD’s marketers aim to dupe consumers with bankrolled headlines. The same tactics were used with the Radeon 5000 series GPUs. Zen 4 needs to bring substantial IPC improvements for all workloads, rather than overpriced "3D" marketing gimmicks. New PC builders have little reason to look further than the $260 12600K which, at a fraction of the price, offers better all round performance in gaming, desktop and workstation applications. Users with an existing AM4 build should wait just a few more months for better performance at lower prices with Raptor Lake or even Zen 4. The marketers selling expensive “3D” upgrades today will quickly move onto Zen 4 (3D) leaving unfortunate buyers stuck on an overpriced, 6 year old, dead-end, platform. [Mar '22 CPUPro]

MORE DETAILS

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Why does UserBenchmark have a bad reputation on reddit?
Marketers operate thousands of reddit accounts. Our benchmarks expose their spiel so they attack our reputation.
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Brands make boatloads on flagships like the 4090 and 14900KS. We help users get similar real-world performance for less money.
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We don't pay youtubers, so they don't praise us. Moreover, our data obstructs youtubers who promote overpriced or inferior products.
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