4790k High default VID = low OC. Will Delidding CPU help?

crasherkid

crasherkid

crasherkid

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HI, just a quick one.
Isn't it unusually high for my 4790k in an ASrock Z97 Extreme4 cooled by a H105 to have a stock VID of 1.271?
This is everything at default including multi core enhancement OFF (4.2GHz max with turbo)
I know every chips different but boy this is a badly binned chip right?
I managed to get 4.5GHz at 1.250v and 4.6GHz at 1.33v, if I try lowering the vcore on any of these settings I get instability and BSOD restarts.
Strangely I can get 4.7GHz at 1.375v which was stable playing a game for over 3 hours.
Temperatures using Intel Burn test were obviously in the 90's during full load at 4.5/4.6 and 4.7GHz but whulst gaming temps did not exceed 60C which I'm okay with.

My question is about delidding the CPU - especially for those people who have delidded their chips.
If I delid my chip, I know it will be somewhat cooler. Lets say even a 5-10C drop at the most. At the same overclock settings after a delid, will I be able to apply less vcore at the same OC setting??
For example - (before delidding) If I need 1.33v to get 4.6GHz stable, Can I get 4.6GHz at less vcore, say 1.29 (after delidding)
I'm trying to figure out if delidding requires less voltage at the same OC/speeds before a delid or will the all the voltages remain identical to keep the chip stable and simply drop my load temps a little?
Hope that made sense.
Thanks in advance.
 
No the voltages will be very similar, your chip will just run cooler, chips do get more efficient as theyre cooler but it 10 degrees wont make a noticable difference. Your stock voltage does seem a little high, i think mine used to go to about 1.25 but i think all chips are different and some just run at lower volts on stock. Dont forget if you put a real high LLC you can end up with higher load voltages.

Ill stick mine back on stock and have a look what its running at.
 
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You my friend are in luck.

I am typing on a delidded 4790k running on a z97 extreme 4 :D

My stock vid is 1.199v

My chip is very very good. it runs 4.7GHz at near stock volts, and 4.8GHz with not a whole lot more. (Its been a while so I really cant remember the details)

Bad news for you is it was great before I delidded it too. It was hot as hell, but it was stable at low volts. Delidding it made almost no difference to the voltage needed to become stable. maybe 0.01v

Good news for you is your chip is probably around average I guess. Maybe just a tiny bit bellow, but you cant really complain.
 
Just checked mine its 1.212 stock so 1.27 does seem a little high but your not gonna be using it on stock voltage, just update your bios and if its still the same dont worry about it.
 
The only thing delidding does is lower the temperature. It won't magically allow you to lower voltages. If you are running the bios that the motherboard arrived with then several boards have been known to overvolt on original bios versions. Usually a flash to a newer version fixes this. Your 4.5ghz overclock voltage is not that bad. It's better than my delidded 4670k at 4.4Ghz which requires 1.275v.
 
Thanks for all the help guys, its exactly as I thought that delidding won't allow to out to lower volts.

I am using the latest bios which was updated last week I think its v 2.50 and also done a clean install of windows.
 
If 4.5ghz runs a lot cooler than 4.6 because of the voltage difference then i would drop it down to that, the main advantage you get from delidding is been able to run your max overclock all the time without silly temps, but in your case i would be more inclined to run at 4.5ghz to keep the temps down in the 80s under heavy load rather then it hitting the 90s. While your gaming it might only be running at 60 degrees as its more than likely only at <50% usage but if you start loading a few programs whilst your game is running you might get spikes in temp leading to instability, especially if its a hot day.
 
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I only use my machine to play Arma3 at 1440p and web browsing etc but I've noticed that at a higher over clock Arma3 runs much smoother.
At 4.5GHz, as your walking you can see the game rendering the grass and trees slowly and its quiet annoying but at 4.6 it does it much quicker and further away from you but at 4.7GHz its pretty much non-existent. You just don't see it at all at this settings and the game just seems so much smoother.
 
Thats a shame, well if Arma is all you play you wanna get it looking right, maybe ask in the PC games thread what others do to resolve the issue as im sure other people playing wont be overclocking to sun an extent.

If theres no other way to stop the annoying popping textures then maybe try to find a better clocking chip, most people on the bay would buy your chip without caring how far it overclocks.
 
Yeah your spot-on @BluD.
Shame because at 4.7 the game runs literally perfect, but requires such a high voltage of 1.375v.
I've backed down to 4.6 at 1.299v, I know the system isn't here stable here at all using any synthetic benching but it's rock stable playing Arma and that's all I'm doing so I'll leave at this for now.
Thanks for all the input above, much appreciated.
 
Sorry for bringing this thread back up but I feel I need to update what happened.

So following on from my original post, I thought I would attempt my first delid using the razor method after watching a few videos, plus not having a vice.

I thought the whole delidding process was a real pain the 455, especially getting the blade in behind the IHS but once you've loosened a corner it all becomes easier.

I applied CLLP on the core and put the chip back in the socket and to my horror, nothing was displayed on the screen. Tried everything and noticed a few scratches on some gold contacts on the PCB. After a further testing I realised that I killed the chip. Ouch!!
Lesson learnt - if ever I was to delid again, I would take my time and not rush it and also I think the vice method would be the safer option.

So I bought another chip off someone on Gumtree, brand new sealed box for £200 which I think is a steal considering the 4790k is now retailing for over £300!!

On this chip, the stock VID fluctuates between 1.171v-1.221v which at first isn't that far off the chip I killed which was 1.271 stock VID.

But one thing I do know is this chip is heaps better than the previous one when it comes to over clocking. The old one needed 1.33v to be stable at 4.6GHz but on this new chip 4.6GHz is stable at only 1.235v - what an enormous difference.
I've tested 4.7GHz which is stable at 1.265v (1.375v on the previous chip which was barely stable) and also managed to get 4.8GHz at 1.286v.
I'm absolutely chuffed to bits with this chip, especially now that I've seen a CPU run 4.8GHz for the first time in my life lol.
I've tested stability using Intel Burn Test on Maximum and also Cinebench R15, Aida64 Extreme stability test and playing Arma3 single and multiplayer.

What do you guys think? Should I put it through its limit and see what vCore I need to run 4.9GHz and especially that wonderful figure of 5GHz??
 
If I could get 5Ghz 24/7 out of mine i would but it requires too much voltage.

There is no harm in trying to see what it will take. Just keep an eye on temps as you push the voltage and dont go too high. Your not going to run more than 1.4v 24/7 so no point really going more than that even if its just a test.

Btw the vice method is super easy incase you ever feel you want to have another go.
 
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Bad luck

I killed my 3570k when I delidded it with razor method.

I purchased one of those super expensive delid die mate things when I did my 4790k just to be sure all went well lol.

Sounds like it sorta worked out in for you the end though.
 
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