Caporegime
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someone mentioned you can even overclock the 8400. not by a lot but enough to make it worth looking into. by overclocking the clock rather than the multiplier.
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8400 turbo on all cores?
- Thread starter P4Clock
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As promised, i can report that now having built my nephews pc and got it up and running, the i5-8400 does indeed boost to and hold at 3.8ghz on all cores. Also, If not all cores are 100% loaded you see 3.9/4.0ghz across them all sometimes too.
Here is a cpuz shot - basically it performs like a 7700k stock for stock in single and multi!
Pretty impressive for £170. That is with no fiddling, and on the cheapest z370 board available (asrock pro4). Just installed, ram at xmp into windows and that is what you get^
This was with 2400mhz ram
Here is a cpuz shot - basically it performs like a 7700k stock for stock in single and multi!
Pretty impressive for £170. That is with no fiddling, and on the cheapest z370 board available (asrock pro4). Just installed, ram at xmp into windows and that is what you get^
This was with 2400mhz ram
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What are you cooling the 8400 with, and what are temps like in games?As promised, i can report that now having built my nephews pc and got it up and running, the i5-8400 does indeed boost to and hold at 3.8ghz on all cores. Also, If not all cores are 100% loaded you see 3.9/4.0ghz across them all sometimes too.
Here is a cpuz shot - basically it performs like a 7700k stock for stock in single and multi!
Pretty impressive for £170. That is with no fiddling, and on the cheapest z370 board available (asrock pro4). Just installed, ram at xmp into windows and that is what you get^
This was with 2400mhz ram
Just the cooler you get with it. Havent played any games but using the cpuz stress/bench tool temps seem to go up to about 50 degrees ish on all cores after 5 minutes, so i cant imagne gaming is going to take it much above 60 even on a long session.
As promised, i can report that now having built my nephews pc and got it up and running, the i5-8400 does indeed boost to and hold at 3.8ghz on all cores. Also, If not all cores are 100% loaded you see 3.9/4.0ghz across them all sometimes too.
Here is a cpuz shot - basically it performs like a 7700k stock for stock in single and multi!
Pretty impressive for £170. That is with no fiddling, and on the cheapest z370 board available (asrock pro4). Just installed, ram at xmp into windows and that is what you get^
This was with 2400mhz ram
Good job, perhaps this will silence all the bs floating around.
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What, like how all i5-8400 will only allegedly run at 2.8ghz on B360 boards?
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Has this been tested? I'm curious because I've heard all kinds of claims. If somebody is looking to build a gaming PC then the i5 8400 looks a smart buy but I just don't know how it behaves in budget oriented motherboards
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It's been tested on budget Z370 motherboards plenty of times with the same result - 3.8GHZ all core boost.
Not tested on B360 as they don't release until next year, but these would need to have incredibly weak power delivery (and Intel would have to be putting out very badly binned 8400s) to only make 2.8GHZ the max all core boost.
Well who knows about budget boards but Ive seen with my own eyes it easily does 3.8ghz on all cores and 4.0ghz on one or more loaded cores on one of the cheapest z370 boards.
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I thought that 2.8 was it's base clock though. I mean would it be likely that they are only boosting to 3.2 - 3.4 for example?
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Yeah 2.8GHZ is the base speed. Some speculate that this will actually be the max all core boost speed when on budget B360 motherboards.
It all comes from a recent Intel announcement that they are no longer publishing all-core boost frequencies. Some took this as meaning Intel no longer guarantees these speeds, but simply not publishing these figures is different to a guarantee.
B360 + 8400 hasn't been tested yet, so we don't know for sure, but there isn't any precedent for locked Intel CPUs being unable to reach expected speeds on budget boards.
Last edited:
Caporegime
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As promised, i can report that now having built my nephews pc and got it up and running, the i5-8400 does indeed boost to and hold at 3.8ghz on all cores. Also, If not all cores are 100% loaded you see 3.9/4.0ghz across them all sometimes too.
Here is a cpuz shot - basically it performs like a 7700k stock for stock in single and multi!
Pretty impressive for £170. That is with no fiddling, and on the cheapest z370 board available (asrock pro4). Just installed, ram at xmp into windows and that is what you get^
This was with 2400mhz ram
Oooh,I like the part about the 4GHZ boost when not all cores are active,this kind of sounds useful for FO4.
100% depends on the chip and individual system configuration. Intel have released a statement saying 6x2.8Ghz is all the'll guarantee from now on. This is beçause Intel's binning strategy sees the cream of chips heading to the mobile and Xeon parts and the rest then filtered down to the desktop models.
As promised, i can report that now having built my nephews pc and got it up and running, the i5-8400 does indeed boost to and hold at 3.8ghz on all cores. Also, If not all cores are 100% loaded you see 3.9/4.0ghz across them all sometimes too.
Here is a cpuz shot - basically it performs like a 7700k stock for stock in single and multi!
Pretty impressive for £170. That is with no fiddling, and on the cheapest z370 board available (asrock pro4). Just installed, ram at xmp into windows and that is what you get^
This was with 2400mhz ram
This is a Ryzen 1600 @ 3.6ghz as a comparison:
This is a Ryzen 1600 @ 3.6ghz as a comparison:
Even with 400mhz less clock speed. If you keep running the bench test a few times Ryzen gets faster.
This is a Ryzen 1600 @ 3.6ghz as a comparison:
As expected, better multi but worse single.
Can't really compare those scores, they are using different versions of cinebench
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