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Who actually has an i5-8400?

southernorth

southernorth

southernorth

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1 Jul 2016
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I see lots of praise on this CPU from review sites about gaming performance, but a lack of information from actual buyers. I also see OCuk is now sold out of i5-8400's.

To those of you who own an 8400 - does your own performance match the reviews?
 
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It's only 1 sample size, but the video below is an i5-8400 with a stock intel cooler maintaining 3.8ghz all cores at reasonable temperatures. Uploader doesn't know what MCE is either, so we could assume it's off.

 
AndreiD said:
That's how MCE worked for years now, I had it on my old Z77 board. It's not something that should be turned on by default since the voltages it sets are fairly awful because they have to account even for the chips that lost the silicon lottery.

But it's pretty nice if you have a locked chip. I wonder if we'll get some BIOS versions with BCLK overclocking for locked chips, a few boards have clock generators on them.
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You can BLCK overclock the 8400 at the moment, to around 102mhz. I think that translates to 3.9ghz all cores instead of 3.8ghz.
 
5XXmeWr
I've seen somehow report 4ghz all cores with an 8400:

https://imgur.com/5XXmeWr
5XXmeWr
 
Aretak said:
I've had mine on both an ASRock Gaming K6 (which I returned after having issues) and now an Aorus Gaming 7, and MCE has had no effect on the 8400 on either. There have been no other reports of it boosting to 4GHz on all cores anywhere as far as I know, so it's pretty safe to say that Intel aren't allowing it to work on non-K chips. The Gigabyte board actually presents a whole load more options with it than the ASRock one, which hid almost all overclocking stuff with a non-K part. However, even manually setting the turbo ratios to 40x has no effect. However, you can overclock the uncore on the Gigabyte board (no option to on the ASRock). I set it to 4GHz, but the highest I've actually seen it hit is 3.7GHz. Still a decent bump from the default 2.8GHz though and it improves performance a few percent based on PC Gamer's review.
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https://www.reddit.com/r/intel/comm..._mce_on_will_it_do_4ghz_on_all_cores/dofc356/
 
Aretak said:
Clear BS IMO. The chip is idle and it only drops down to 3.8GHz when all cores are loaded. His minimum listed for all cores is also 3.8GHz. Why would that be if it's staying at 4GHz under load? I'll believe it when someone posts a screenshot of the chip loaded and sticking to 4GHz on all cores. Nobody has yet done so, including that guy, regardless of what he claims. Seems more like he's turned off all the power saving features so that it sits at 4GHz at idle, then drops under load as normal.
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He was asked for a video showing the 4ghz speed but hasn't posted anything yet. I am a bit suspicious too, have seen 0 chips boost above 3.8ghz.
 
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