CPUBoss Review Our evaluation of 5820K vs 4790K among desktop CPUs (over 75W)


Benchmark performance using all cores

PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more


Are you paying a premium for performance?

Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more


CPUBoss Score

Combination of all six facets

Intel Core i7 5820K 

CPUBoss recommends the Intel Core i7 5820K  based on its .

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Differences What are the advantages of each

Front view of Intel Core i7 5820K

Reasons to consider the
Intel Core i7 5820K

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CPUBoss is not aware of any important advantages of the 5820K vs the 4790K.

Front view of Intel Core i7 4790K

Reasons to consider the
Intel Core i7 4790K

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Has a built-in GPU Yes vs No Somewhat common; A separate graphics adapter is not required

Benchmarks Real world tests of Core i7 5820K vs 4790K

CompuBench 1.5 (Face detection)

Core i7 5820K
6.74 mPixels/s
Core i7 4790K
15.01 mPixels/s

CompuBench 1.5 (Video composition) Data courtesy CompuBench

Core i7 5820K
3.71 fps
Core i7 4790K
12.09 fps

GeekBench 3 (Multi-core) Data courtesy Primate Labs

GeekBench 3 (Single core) Data courtesy Primate Labs

GeekBench 3 (AES single core) Data courtesy Primate Labs

Core i7 5820K
4,050,000 MB/s
Core i7 4790K
5,140,000 MB/s

GeekBench (32-bit) Data courtesy Primate Labs

PassMark Data courtesy Passmark

PassMark (Single Core)

Specifications Full list of technical specs


Core i7 5820K  vs
Clock speed 3.3 GHz 4 GHz
Turbo clock speed 3.6 GHz 4.4 GHz
Cores Hexa core Quad core
Is unlocked Yes Yes


Has a NX bit Yes Yes
Supports trusted computing No No
Has virtualization support Yes Yes
Instruction set extensions
Supplemental SSE3
AVX 2.0
Supports dynamic frequency scaling Yes Yes

power consumption

TDP 140W 88W
Annual home energy cost 33.73 $/year 21.2 $/year
Annual commercial energy cost 122.64 $/year 77.09 $/year
Performance per watt 10.78 pt/W 11.41 pt/W
Typical power consumption 113.75W 71.5W


Architecture QPI DMI 2.0
Number of links 0 0
Transfer rate 0 MT/s 5,000 MT/s


Core i7 5820K  vs
Architecture x86-64 x86-64
Threads 12 8
L3 cache 15 MB 8 MB
L3 cache per core 2.5 MB/core 2 MB/core
Manufacture process 22 nm 22 nm
Max CPUs 1 1


Overclocked clock speed 4.34 GHz 4.64 GHz
Overclocked clock speed (Water) 4.53 GHz 4.8 GHz
PassMark (Overclocked) 5,572.2 6,925.3
Overclocked clock speed (Air) 4.34 GHz 4.64 GHz

integrated graphics

Label N/A Intel® HD Graphics 4600
Number of displays supported N/A 3
GPU clock speed N/A 350 MHz
Turbo clock speed N/A 1,250 MHz

memory controller

Memory controller Built-in Built-in
Memory type
Channels Quad Channel Dual Channel
Supports ECC No No
Maximum memory size 65,536 MB 32,768 MB
Intel Core i7 5820K
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Intel Core i7 4790K
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Showing 25 comments.
According to CPUBoss the Intel Core i7-4790K is a much better processor! (this despite it being the cheaper let me know they are not just full of it). They (CPUBoss) did the benchmarks! They did not just pull those number out of their you-know-what! I am looking to build a new rig, and I was gravitating towards the Intel Core i7-5820K. This has caused me to change my mind - and save some dough! Thank you guys.
This faggot
look at your language now f called you a fucking pussy ass just because my opinion is different from yours, would you get fucking angry?! Go troll yourself, you dick
Yeah, but cpuboss is now just bullshit because they count the igpu and then give cpus their scores. its completely fucked up
Sorry cpuboss but I use the both processor at the same time with two different computers with almost same hardware spefications. 5820k is much more better. Unquestionable.
The single-core performance is nearly identical at the same clock speeds. Unless you don't want to overclock, the 5820k is better, you just have to get sufficient cooling for it.
Did you read my comment? Read it again, because you just made my point, which you seem to have missed.
For a first time build, 4790k or 5820k? 4790k build is about $300 cheaper
Of course the Intel will be better. Intel CPU's are hyper-threaded; AMD's aren't. You can't compare an Intel quad core to an AMD because the Intel has 8 threads and the AMD only has 4. A 4790K is better if you're using your PC for applications like gaming, which is what most people who buy a 4790K will use it for. But there are many non-gaming applications that can make much better use of having the additional 2 cores of the 5820K, like video rendering and 3D applications. Both are excellent chips, it just depends on what your needs are.
I think it is specifically higher than i7 4790K
Wow aren't you mature... You're obviously a troll, a liar and several other things but I'll reply anyway. DDR4 is only an upgrade to your credit utilization, not to your computer. Unless you think it's worth building a new system for a 5% performance increase, I certainly don't. You keep talking about 16 year olds with mommies, men, adults, etc and you call anyone who doesn't agree with you an unevolved idiot. Sounds like you're the one with the childlike mentality. I just built a new system, I didn't go with a 6th or even a 5th gen CPU, I went with the 4790k because I know what I'm doing and I think for myself. The same can clearly not be said for you.
Your opinion is irrelevant, we're talking about facts. The fact is, the 4790k has better real world performance because it has better single-core performance. I just built a new system and I didn't go with Skylake, I went with a 4th gen 4790k because it's the better choice.
old post dont reply
XD, "I write the checks, not cash them", "Statistically.... most of you are poor to upper middle class at best. I bet you're all jealous, unable to afford EITHER processor." You think that burning 5 grand in overpriced tvs and pcs that you don't need makes you better? It makes you a fool, dude. I can get the same stuff for 1/3 of the price right now, just because I didn't rush to burn my cash in overpriced stuff that I don't even need. And what do you do with all that overpriced stuff that you bought anyway? I doubt you are doing anything productive with it. If you are really like this (and you aren't trolling), then you have serious problems of self-esteem, anger and ignorance. You are able to survive in this world because those "losers" that you are so fond of mentioning, work to put food on your table, shoes on your feet, clothes on your body, etc. It's called society. If those "losers" decided to treat you like the trash it appears you are, they'd grab a gun, shoot you in the head and be done with it. Fortunately, most people know better and tolerate that shitty and ridiculous attitude that you have, for the greater good. Btw, what good is money if you are alone? What good is money when you have no friends, nobody that gives a shit about you because you are such a dick? So, you found a way to earn big money, but for how long will this situation last? Are you fighting for that money? If so, what happens when you get seriously injured, unable to keep fighting? What happens when your fighting days are over? Have you thought about that? Who'll feel like a loser then? At that point, the little money you have left after years of burning it in superfluous stuff, won't matter... don't you see?
No dude, 6 cores doesn't mean faster data transfer. That depends on bandwidth, architecture, etc. People are still assuming that more cores and a higher clock speed necessarily mean better performance. That's just dumb, if that were the case, then AMD would've been ruling the cpu kingdom for the last decade, and experience shows us that the opposite is true. I have two builds at home, one based on Intel quad-core, the other based on AMD quad-core... One rapes the other, I'll let you guess which one.
Yes, that is right. I think 5820K is better than 4790K by 20-30% (my opinion). Though i7 5960X is still the best. It has extreme prices however
Funny How people who buy gaming PC Think They know everything. Grow up. Just got Done building 2nd Gam pc Saved myself good 1000 bucks. Went with 4790k water cooled, no stupid fan. Not much diff between 4790k and 5th gen or even 6th. That why went with 4790k Devils canyon. plus you can overclock hell out of it. Quad core better then hexicore for gamming. CPU Boss right. Other Computer sites results same 4790k actually out performs 5820k in some areas. anybody buy pc stupid Go new egg get parts build. That's it
If we told you the 4790 was now a number over 9000 would you buy it? And are you saying that you have been a pussy till last year?
ther he goes ... now STFU and go beat up your wife
hi Alex. I think no, if you have a serious 4790k system, with a good sample cpu with nice OC capabilities OR if you don't want to OC at all. I had the 4790k, but was disapppointed with that, can't oc higher than 4,6ghz stable with decent cooling (Be Quiet Dark Rock Pro3) so i decided to return and invest a bit more to X99 platform (4 channel faster & more memory support, 6or+ cores, more pci lanes, dont have to delid and so on...). Now, my 5820k is running on 4,6ghz (3x4,5ghz and 3x4,7ghz actually) with Noctua NHD15 rock-solid & stable, Just finished a couple of skylake build, only 6600k (so i5) but im a bit disappointed on the OC capabilities, both ended up on 4,5ghz - 4,6ghz stable :( (w. dark rock pro 3) which is not bad, but its far behind the previously hyped & announced "5ghz or more on air cooling".... Verdict: i wont change this system (5820k + Asus X99-A) its killer for sure. Will skipp broadwell-e, but maybe later on if skylake-e will be released but i guess there wont be a huge stepp forward (...but we'll see).
After a search or two I found your gem of a youtube channel: https://www.youtube.com/user/FUCKYOURFACEINTHEMOU/videos BTW, I really liked this video: https://www.youtube.com/watch?v=3rAk9LcSP1A it really shows the luscious lifestyle of a famous person
Each has their application. 4790k has much better single core performance. The 5820k has much better multithreaded performance. I wouldnt state one is better than the the other as each have their strengths and it comes down to the question what are you doing with the computer? Seriously everyone needs to relax.
Is there any good reason for the common consumer (like me), to upgrade from 4790K ? I guess not...
It depends on how the game/program is written if its set to use 1 core then 4790k is better or if its set to use all cores then your program will run faster on a 5820k.
My 5820k can oc to 4.6 ghz easy on a 1.29 vcore and stay stable but i keep it at 4.5ghz at 1.263 vcore but i can go lower with the voltages if i wanted. I have had this cpu now for about 9 months. I got it back in january 2015 and i ran a 4.3 ghz oc for 3 to 4 months on the built in oc preset and then i decided to bump it up to 4.5 and handle the voltages my own self and i have been running that oc every single day for the past 5 months and my pc never crashed not a single time so my 4.5 ghz oc is super stable. Temps are rarely above 60 degrees while stress testing with msi kombuster on air cooling and the max temp i seen was 70 on a single core while the rest was 65 or below. Under normal heavy load like gaming it will never or hardly go above 60 on air cooling. The 5820k is very reliable and temps are never a issue for me no matter how high I overclock it. I probably struck the silicon lottery with this chip but i see no reason why no one can't get to at least 4.3 ghz cause that is the max overclock preset on the gigabyte ud3 motherboard which allows for easy overclocking without having to to set vcore your own self. The gigabyte ud3 is one of the cheaper x99 motherboards and they can be bought for under 200 dollars and the quality is just as good as the ud4 and ud5 and the main difference is that the ud4 and ud5 has more ram slots and that is pretty much it. With all that said i think the single core performance numbers that cpu boss provides are are a pile of bull and they change from comparison to comparison so even tho this site says the 4790k is 10 percent faster then 5820k do not mean it is still faster when they are clocked at the same frequencies. I have watched benchmarks before of these cpu's clocked the same and when they are they both provide roughly the same fps with both of them trading blows. I always take this site with a grain of salt and just use it to look up things like core count, features they have and etc. If i wan't to know the single core performance then i go to reputable videos on youtube or elsewhere on the net and look up benchmarks where both cpu's are clocked exactly the same and from my analysis it seems both of these cpu's perform almost exactly the same in games and trading blows with each other. There is a lot of benchmarks on youtube where they keep the 5820k at it's stock clock cause we all know that it's stock clock is low so it kinda gives the impression that it don't perform as good as other processors when it really can so it seems to me that it is a no brainer to go with the x99 if you happen to have the funds to cover it cause there is just so many extra benefits it provides over normal haswell cpu's while also giving similar performance in games. Just be sure if you do get it to make sure you have a beefy psu to power it cause with a big overclock and being under load this cpu will draw over 200 watts.
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