Help me choose my next CPU upgrade!
Written by: Zero60 - 17:03 Jun-03-2015

I'm torn between these 2 CPU's! I know that going with the 5820K will require a bit more pocket money (more expensive motherboard and a jump to DDR4 memory), and I am prepared for that. If you could include a bit of information as to why I should go for either one, that would be appreciated. The one with the highest votes will NOT automatically be what I buy, but I will take it into consideration. Thanks for stopping by! :D

Which to get?

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18:22 Jun-09-2015

this for a gaming rig or developing rig? my opinion is if u wait for skylake?
u might be better off :) cause i see u already have a fx 8350. rather if u can put a second 970 in there u will be cruising :)

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18:50 Jun-09-2015

It's a mix of the two. I'm just not liking the performance I am getting in games, and I know that people with Intel CPU's are getting better performance. I'll only get a Skylake CPU (I have my eye on the 6700K) if it will be the same price as the 5820K.

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22:41 Jun-09-2015

why would you get an i7 6700k for the same price as an i7 5820k, it should be cheaper. Also from what some "leaked" benchmarks have shown the i7 6700k is only 2-8% better than the i7 4790k, but if you ask me it should be 15-25% better, or they have focused on the iGPU purely and just made haswell with a 512 Bit FPU(to get a lot more synthetic benchmark scores) and shrunk it to 14nm. Who knows to be honest.

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07:47 Jun-10-2015

6770K should cost less than 5820K because it's not even supposed to be better than 4790K :P it's all about PCI lanes, if Intel wants to spread SATAexpress and M.2 then with common 16-lane cpu (4790K, 8350) you cannot SLI cards and have such fast storage

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08:10 Jun-10-2015

so the i7 6700k just has a 512 BIT FPU and a better iGPU after all, I wanted to be a good upgrade, but iGPUs is what they should focus really, but at 14nm why do give some die-space to make better and stronger cores? Power consumption? Heat? Less expensive? Probably.

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18:53 Jun-09-2015

thats what i would do skylake :)

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07:45 Jun-08-2015

You know where I stand.
I've seen the 4790k go neck and neck with a 5820k.
Rendering is where the 5820k will stand out. Again, because it's not a mainstream processor at that point.
Tzzmk is right, the TIM(thermal controller) is just...... SMH.. The worst. But you also have to remember, the 4790k is also packing an igpu.
The benefits of DDR4, I'm just not seeing at the moment. And it has been proven time and time again in benchmarks that it makes little to no difference in gaming.
Honestly, you could get a 4690k, and a second 970. Boom your rig is better than mine already.
The i7's for gaming are just.. so overrated most of the time. But hey, I can't say much.
I do, honestly. Advise you to steer away from the 8350. In whichever you choose.

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00:07 Jun-08-2015

Ridiculous easy choice, if enought money then just grap 5820K and roll with that one, my advice for you buddy ;)

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09:08 Jun-05-2015

I will choose i7-4790k because of TDP 88W.
Just wait for Skylake, dude!

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09:45 Jun-05-2015

I wonder if anyone ever tries disabling the two cores of 5820K, clock the remaining 4 up to match 4790K and see if it's even more efficient than 4790K :D

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17:36 Jun-05-2015

if skylake has better heat disappation, then that 88W TDP(thermal design power, a.k.a heat output and how good of a cooler you need to cool the hardware, messured in watts and NOT the power consumption), will still be technically less than the 95W Skylake, but skylake will run cooler.

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22:42 Jun-05-2015

as long as Intel will put voltage regulators into cpu chips and put sh!tty TIM between chip and heatspreder there is no chance for even serious liquid cooling to give good overclock results

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18:05 Jun-04-2015

I'm going sum up some things I noticed from my research in the X99 platform.


1) Asrock has the lowest power consumption. Usually not that important, but I'm talking about 25w at full load!
2) Gigabyte has only 2 lanes for the M.2 slot, while all other manufacturers have 4.
3) Asrock is the only one that doesn't rely on hubs. The bandwidth isn't big enough to handle all the ports on these hubs.
4) Asus wins on audio quality and features... price not so much.

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04:12 Jun-06-2015

Asus usually has the most amount of phases too...

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10:47 Jun-08-2015

any idea about praised ASUS OC Socket on X99 mobos, with some additional pins? doesn't make much sense to me if all other manufacturers are just dumb or what

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07:22 Jun-09-2015

Gigabyte's X99-SOC Champion, X99-Gaming 5P and X99-UD4P all have the OC socket. It's really more of a marketed thing than anything else.

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15:07 Jun-04-2015

Thank you to all who have replied and/or voted! I think I will make the jump to the 5820K after Skylake releases to see what sort of price drop, if any, will happen.

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07:55 Jun-05-2015

when is Skylake going to be released for public? I'm waiting for DDR4 prices drop too :D

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08:16 Jun-04-2015

I've been deciding for about half year already (I have fairly good rig so I don't need to hurry), so let's sum up the facts (don't hesitate to correct me if I'm inaccurate):
1.1) i7-5820K can be overclocked to match i7-4790K in per-core performance (e.g. 4.5GHz)
1.2) i7-4790K has sh!tty thermal interface material between chip and heatspreader and so can overheat regardless of cpu cooler choice, therefore easy to throttle and underclock, as reported by many users
1.3) i7-5820K offers up to 28 PCIex lanes while i7-4790K only up to 16 PCIex lanes, not a big deal unless you're running more than 2 gpus (x8 mode each, no performance drop) and additional PCIex device (wi-fi card, audio card, SATAexpress or M.2 drive which share the cpu lanes as well)
1.4) i7-5820K is a bigger cpu although not having igpu, cooling performance and socket requirements vary, affects also motherboard layout and power phase design - yet the voltage controllers are part of the chip itself (unlike previous Ivy Bridge series) which may offer more efficient power/voltage control but also more heat

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08:17 Jun-04-2015

2.1) X99 mobos are definitely more expensive, but when you sum up all the features and quality they're actually not that more expensive compared to high-end Z97 mobos
2.2) certain cheaper X99 mobos (MSI X99S SLI Plus for ex.) have miserable quality PCB - "matte" without any coating so they literally decay which may lead to short circuits and damage of components
2.3) Z97 mobos can be smaller, often microATX or sometimes even mini-ITX, while X99 can be bigger than regular ATX, e.g. EATX (E mean extended "to the right", not "down") where you can fit up to 4 2-slot cards (so 7 pci slots and 8 expansion brackets in total)
2.4) onboard 5GHz (I think 5GHz) Wi-Fi appears to be a problem recently, because the radiation frequency collides with USB 3.0 controllers, so keep that in mind as well
2.5) some mobos (like for ex. Gigabyte UD5) suffer(ed) problems of not being able to boot if some usb devices are plugged in, I don't remember if some BIOS update fixes it yet
2.6) RAM compatibility lists are fairly incomplete and also beware sometimes 4 sticks may work but 8 not, BIOS updates are on the way but every manufacturer has its own tempo and quality of support

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08:25 Jun-04-2015

3.1) for price of budget 16GB DDR4 you can buy 24GB DDR3 and still some money left, so yes, DDR4 are expensive
3.2) ratio of ram frequency and CAS latency appears to be not better than many DDR3 sticks, which basically means that although you can operate with more data at higher speed (default DDR4 is 2133MHz while DDR3 are usually 1600MHz) they may suffer from long processing time (to simplify, for ex. CL15 means the data is "handled" 15 times before outputting compared to CL9 which means 9 times)
3.3) you can run DDR4 in quad channel, all 2011-V3 cpu support that, probably no big deal unless you know what tasks and processes can make use of it - for ex. RAMdisk(s) - I'd point out that although such thing offers blazing speed (12GB/s write on my current rig) it's too expensive (price/capacity) even if compared to decent SSDs like my 512GB 850EVO
3.4) certain high-clocked sticks have quite high heatsinks, if you'd plan air cooling then you might run into problems with cpu cooler heatsinks
3.5) one does not simply buy only 2 sticks of DDR4 ram, sure there wouldn't be probably that much performance drop compared to 4 sticks in quad channel mode, but still it's badass, with current prices 4x4GB makes sense to buy, with CAS latency as low as possible - you can always try to manually overclock, basically manufacturers just guarantee you that certain stick is tested and capable to reach higher clocks stable when overclocked

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09:50 Jun-04-2015

What he said :D

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15:05 Jun-04-2015

Holy information! I love it!!!


Definitely brought up some points I didn't think about or didn't know about. Logging these for when I finally make the purchase. Thanks Tzzzzzz!

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07:20 Jun-05-2015

you're welcome pal, btw keep an eye on my x99 build blog as I'm still updating it until I finally buy something, I'm trying to figure out the best components for the price/quality ;)

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10:24 Jun-05-2015

I7 5820K ..... because it's the one I have xD

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20:35 Jun-03-2015

well if you dont want to wait till Skylake processor launches than if its just for gaming i7 4790k is good but other thing like rendering etc i7 5820k is best

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20:23 Jun-03-2015

ZeroHour if Skylake CPU's is cheaper go with it if not i7 5920k is the best one

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19:37 Jun-03-2015

Personally, wait for the skylake CPUs. If not, get the 5820k, 'cause YOLO.


Im sure that my input is very helpful lol. :D

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19:20 Jun-03-2015

the way that i see it is there botch wicked cpus we both know the ddr4 train is rolling threw and soon going to derail the ddr3 train so if you can financially afford it you may as well make the jump for ddr4 and you will be current until ddr5 thats the way i look at it instead of investing more into something that

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19:20 Jun-03-2015

soon will be faded out thats just my 2 cents

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19:08 Jun-03-2015

What? Why
Just wait for that skylake i7

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18:56 Jun-03-2015

wait for skylake what offers asum they should be more power efficient and more cooler then corrent gen. and i would really wait for win 10 to come meybi your fx8350 can gain extra performance who knows..

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18:33 Jun-03-2015

I'd say wait for Zen and Skylake, ddr4 will be a bigger standard since both zen and skylake will support drr4(and ddr3) and if you do NOT need to upgrade, well don't save more money and buy a whole new PC in 2016 with Pascal or whatever GPU Architecture AMD is bringing out in 2016.


Otherwise between the two, I'd say the i7 5820k, because I think the x99 platform is great if you can afford it.

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18:03 Jun-03-2015

Skylake i7 6700k?

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18:04 Jun-03-2015

Depends on pricing and definitive specifications. So far from what I have seen, I am not impressed.

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18:21 Jun-03-2015

So far from what I have seen, I am not impressed.
I remember Doomsday saying that once right before kicking Superman's ass...

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17:40 Jun-03-2015

I know that's not the choice offered here,but i think it would be best to wait for 6700K and se how it performs compared to these two,and by the time it comes out(just a few months) you could be able to save up some money.And with these two,i would go with 5820K because of all the other tech it offers like DDR4 and much better MOBOs,and it offers better performance in rendering and stuff like that

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17:46 Jun-03-2015

I was actually thinking about getting the 6700K, but seeing articles about it not performing that much better than the 4790K kind of put me off.

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18:42 Jun-03-2015

I would wait for more benchmarks.But as I said,from the ones here i prefer i7 5820K,and it mostly performs better.

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17:31 Jun-03-2015

I would go for the 5820k If you have the coin :)


The reasoning I have for this is the "work" it can do, rendering for your videos mainly, but in the future if you plan on doing anything else like 3D modeling or game design it will be a great thing to have along with the new DDR standard that come with it.

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17:36 Jun-03-2015

The thing is, when I do render, it doesn't really take all that long. I may gain what, an extra 5 minutes? Not really that worth it if I am only making a few videos a week. I also have no plans on modeling or game design any time soon.

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17:24 Jun-03-2015

5820k for rendering yes for gaming no ;]

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17:51 Jun-03-2015

But the 4790K performs just under a 5820K in rendering situations. Not sure it is worth the price difference.

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18:19 Jun-03-2015

If you need more than 4 cores in rendering it counts ;]

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18:22 Jun-03-2015

5 minute difference is nothing for me though. It won't matter.

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17:10 Jun-03-2015

I honestly don't know which to say here as it all depends on what the hell it is you want to do with this rig... But I always say - the best CPU for your gaming and other needs is the best one you can afford right now... So get that hexacore if you can indeed afford it and are willing to shell out the cash for the mobo and DDR4 RAM... But if it pains you too much, that i7 isn't quad isn't exactly a sissy... According to game debate the 5820K is only 10% better than the 4790K... Is this right...?

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17:17 Jun-03-2015

That sounds about right. Yeah I just don't know if it is worth the extra cost. I'm always up for saving money, so it just may not be worth the extra cost. Thanks for the input.

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