i5 8400 vs 5820k gaming performance?

Dangerous_Dave · 8 Oct 2017 at 05:19

I'm considering a 5820K upgrade, but with the launch of the new 8400, I'm wondering if that might be a better option. So my question is, can anyone discern which has the better gaming performance, if you overclock the 5820k? (taking price out of the equation).

gavinh87 · 8 Oct 2017 at 07:41

Not sure if this helps but I'm sure the 5820k would be able to keep up once overclocked.

Jono8 · 8 Oct 2017 at 08:49

I have a 5820k and i would consider an 8400 a downgrade. no multithreading and capped at 3.8ghz on all cores.

Most 5820k's will do 4.3-4.5ghz fairly easily ( i have mine at 4.3 with nice low voltage).

However, if i was buying stuff right now it would be a tricky decision. I would probably be inclined to get the 8400 instead of faffing with a used 5820k or spending loads on a new one. That way you could upgrade to a 8700k when a good deal lands on one of those. You also get the latest chipset/platform.

~>Dg<~ · 8 Oct 2017 at 12:16

overclocked a 5820k will beat most ryzen chips even ocd in games. you would be downgrading going to a 8400.ocing makes a bug difference to their performance.

only one i would consider from a 5820k would be a 8700k and even then i wouldnt go to that.in games it wouldn't be worth it.

its still a very powerful chip.be good for a few years yet.better off getting a more powerful gpu.

bad 5820ks oc to about 4.2 good ones and im talking about real figures for everyday use are on avg 4.4 -4.6.

4.5 - 4.6 will be matching 5930k sorta performance.which is as said very good for gaming.

Panos · 8 Oct 2017 at 14:00

gavinh87 said:
Not sure if this helps but I'm sure the 5820k would be able to keep up once overclocked.

Bit smallprint on this benchmark. That is at 1920x1080 and their Ryzen CPUs with 2666 Ram at stock speeds........

@Dangerous_Dave mate ain't worth. If you have a GTX1080ti and 1080p monitor, but do not want an extra 10fps the 5820K is perfectly fine. Check where the 5930K is positioned, same CPU. Just overclock it.

All those benchmarks shown with the 8700K, are for a very narrow spec, 1080p with GTX1080ti. Any deviation from ain't worth, even if you have GTX1080 ain't worth.
Even my 6800K @ 4Ghz keeps up (1fps at most) with the 5Ghz 8700K at 2560x1440 with GTX1080Ti.
Pointless upgrade. As for the 8400, is slower than the 1600X in productivity, and very narrow lead on gaming when both at 4Ghz (max speed for the 8400).

Getting an 8+ core CPU is an upgrade imho. But again wait for Zen+ in February. That is the only worthy upgrade for everyone having currently 6-8 core CPU from previous generations.

jigger · 8 Oct 2017 at 14:02

Pretty strange choice. 6700K or 1700X at current prices TBH.

gavinh87 · 8 Oct 2017 at 14:02

Panos said:
Bit smallprint on this benchmark. That is at 1920x1080 and their Ryzen CPUs with 2666 Ram at stock speeds........

@Dangerous_Dave mate ain't worth. If you have a GTX1080ti and 1080p monitor, but do not want an extra 10fps the 5820K is perfectly fine. Check where the 5930K is positioned, same CPU. Just overclock it.

All those benchmarks shown with the 8700K, are for a very narrow spec, 1080p with GTX1080ti. Any deviation from ain't worth, even if you have GTX1080 ain't worth.
Even my 6800K @ 4Ghz keeps up (1fps at most) with the 5Ghz 8700K at 2560x1440 with GTX1080Ti.
Pointless upgrade. As for the 8400, is slower than the 1600X in productivity, and very narrow lead on gaming when both at 4Ghz (max speed for the 8400).

Getting an 8+ core CPU is an upgrade imho. But again wait for Zen+ in February. That is the only worthy upgrade for everyone having currently 6-8 core CPU from previous generations.

What ram speeds were the intel cpus at?

southernorth · 8 Oct 2017 at 14:26

I would stick with 5820k for now.

Jono8 · 8 Oct 2017 at 15:03

I don't think the OP has a 5820k. He is asking which he should buy now.

If he had a 5820k i would agree, he should not bother with anything coffeelake has.However buying new, i would probably go with the 8400 or splash out on the 8700k.

AndreiD · 8 Oct 2017 at 15:14

If buying new I'd lean towards the 8400 too, you can always just pick up a 8700K later on.

~>Dg<~ · 8 Oct 2017 at 15:20

if he doesnt have a 5820k id buy the 8700k and be happy.nothing will touch it gaming wise in the main sector for years.if ocd for the same budget.

DazQ87 · 8 Oct 2017 at 15:35

gavinh87 said:
What ram speeds were the intel cpus at?

The 5830k shown in the graphs is just a 5820k with 0.1GHz higher speed. Both generally overclock to the same level.
Also note that the x99 platform doesn't see any real gains using higher memory in gaming.

I certainly wouldn't entertain upgrading my 5820k to anything in the coffee lake lineup. However if you don't have a 5820k already I would consider a 8700k. That said if you are gaming at higher resolution the CPU really starts to matter a whole lot less anyway.

jigger · 8 Oct 2017 at 15:37

~>Dg<~ said:
if he doesnt have a 5820k id buy the 8700k and be happy.nothing will touch it gaming wise in the main sector for years.if ocd for the same budget.

Well apart from the 6700K,7700K,1800X, 7640X...

imginy · 8 Oct 2017 at 15:40

jigger said:
Well apart from the 6700K,7700K,1800X, 7640X...

You saying the 1800x competes with the 8700k? lol

Panos · 8 Oct 2017 at 15:58

jigger said:
Well apart from the 6700K,7700K,1800X, 7640X...

Totally agree

imginy said:
You saying the 1800x competes with the 8700k? lol

mate, the 8700K has a very narrow performance benefit. Only if you have GTX1080Ti and 1080p monitor.
GPU less than 1080Ti or higher res than 1080p, everything else is shame gaming perf, for less money at better platforms, which aren't dead in 6 months time. Like the Z370

Panos · 8 Oct 2017 at 16:03

gavinh87 said:
What ram speeds were the intel cpus at?

Only SkylakeX and Ryzen benefit from ram speeds due to different architecture.

In the case of Ryzen the difference between 2666 to 3200 is 12% pure fps. Hell the difference between SR and DR ram is around 10% alone, as same speed.
And if I remember you had the 1700 with 2133 ram yes? The gaming fps difference between 2133 and 3200 on Ryzen is 30-40%.
Same applies to SkylakeX when you get 4133 ram over the "stock" 2666 ram. They are 35-40% faster.

imginy · 8 Oct 2017 at 16:05

Panos said:
Totally agree

mate, the 8700K has a very narrow performance benefit. Only if you have GTX1080Ti and 1080p monitor.
GPU less than 1080Ti or higher res than 1080p, everything else is shame gaming perf, for less money at better platforms, which aren't dead in 6 months time. Like the Z370

Very narrow?

Just go look at the coffee lake thread there various forum users getting 50% increase in frames going from the older i7's and risen.

Also you must be looking at different reviews to me.

jigger · 8 Oct 2017 at 16:12

imginy said:
You saying the 1800x competes with the 8700k? lol

Yeah. Mind blowing isn't it

Zeed · 8 Oct 2017 at 16:54

Panos said:
Bit smallprint on this benchmark. That is at 1920x1080 and their Ryzen CPUs with 2666 Ram at stock speeds........

@Dangerous_Dave mate ain't worth. If you have a GTX1080ti and 1080p monitor, but do not want an extra 10fps the 5820K is perfectly fine. Check where the 5930K is positioned, same CPU. Just overclock it.

All those benchmarks shown with the 8700K, are for a very narrow spec, 1080p with GTX1080ti. Any deviation from ain't worth, even if you have GTX1080 ain't worth.
Even my 6800K @ 4Ghz keeps up (1fps at most) with the 5Ghz 8700K at 2560x1440 with GTX1080Ti.
Pointless upgrade. As for the 8400, is slower than the 1600X in productivity, and very narrow lead on gaming when both at 4Ghz (max speed for the 8400).

Getting an 8+ core CPU is an upgrade imho. But again wait for Zen+ in February. That is the only worthy upgrade for everyone having currently 6-8 core CPU from previous generations.

You r missing main point if op question.
He wont upgrade cpu before 2-4 years.
And in that situation 8700k is best option on the market.

Zen+ hard 2 say how that turns out. Needs to clock to at least 4.4 for ne to upgrade. If it wont ill probobly sell ryzen and jump on binned 5ghz 8700k myself as it renders videis same speed as my overclocked ryzen but in games it destroys it
Since i play in 1080p 3D i need IPCs.....

If i knew that ryzen will oc like **** i would have not jumped off 5820k as that was faster in games bit slower on rendering. And id have 1000 pounds left that full upgrade cost me :/

jigger · 8 Oct 2017 at 16:59

Zeed said:
You r missing main point if op question.
He wont upgrade cpu before 2-4 years.
And in that situation 8700k is best option on the market.

Zen+ hard 2 say how that turns out. Needs to clock to at least 4.4 for ne to upgrade. If it wont ill probobly sell ryzen and jump on binned 5ghz 8700k myself as it renders videis same speed as my overclocked ryzen but in games it destroys it
Since i play in 1080p 3D i need IPCs.....

If i knew that ryzen will oc like **** i would have not jumped off 5820k as that was faster in games bit slower on rendering. And id have 1000 pounds left that full upgrade cost me :/

A fair point but the OP is looking at the 8400 and 5820K. I'm assuming chips around the £200-250 mark.