CPU Z Core Voltage shows 0.072 and fluctuating

[saternal]

I just changed my CPU from a i5 4690 to a 4790k and when I opened CPU Z to check the readings, I saw that my CPU core voltage is fluctuating alot. The core violtage shows 0.072 to o.088 and sometimes to 0.10. Isn't my core voltage supposed to be above 1.2 at least. I did not overclock it as i'm using a h97 motherboard.

After installing the new processor, I did not do a fresh install of windows. Windows was able to read and detect my processor and all 4 core sand 8 threads. I confirmed this through device manager and resource monitor.

I did a stress test with CPU Z and noticed that when it is being stresssed the core voltage jumps straight away to 1.2v which is what its supposed to be. My PC is noticeably slower too. ANyone can help me out.

PC Specs:
Intel i7 4790k
MSI H97 Gaming 3
Samsung 850 EVo 256gb
Seagate 3tb
Corsair RM750w
Zalman 9900 air cooler
Corsair 450d
MSI GTX 970 4gb Gaming

 

[saternal]

I also checked HWinfo64 and saw my V core voltage shows the same as CPU Z.

 

[dudmont]

The voltage thing isn't an issue. It's perfectly normal. My 4790k is set a t 1.16 but it dances all over the place(always under), based on load. It's part of EIST. When the load demands it, it's all there.
Now, as to the issue of why your system is slower. How is it slower? Have you run firestrike and some other benchmarks?

 

[saternal]

I used the benchmark that is on CPUZ itself and results were normal. Just worried about the Vcore voltage. HWMonitor shows minimum value 0.056 and maximum at 0.768. Didn't know Vcore can be so low. I searched the web 1st for anyone else who has such a low Vcore as me but couldn't fine any other posts. Most were at 1.0~ and mine is 10x less than that. I know its supposed to fluctuate but as low as 0.056?? Doesn't seem possible to me. How can it go lower then 0.5 and my pc still running?

 

[dudmont]

Here's how. When the vcore is that low, what's the clockspeed at? Do this experiment sometime, it'll enlighten you to a lot of interesting electrical engineering things. Lower your core clock to that speed(say 1.8ghz) and then see how low you can get the voltage at that core speed, it will probably be lower than what CPU-Z is telling you, as a consequence of some inefficiency in how EIST works. It's what's called underclocking. That's what EIST does. It dynamically underclocks(and undervolts), based on load. While I've been writing this, CPU-Z has shown me voltage of .336volts and many other low numbers. It's pretty interesting.

 

[J_E_D_70]

Did you update BIOS?

Your board requires a newer version moving from your old to new CPU (.11 vs .10).

https://us.msi.com/product/motherboard/support/H97-GAMING-3.html#down-bios

 

[saternal]

Here's how. When the vcore is that low, what's the clockspeed at? Do this experiment sometime, it'll enlighten you to a lot of interesting electrical engineering things. Lower your core clock to that speed(say 1.8ghz) and then see how low you can get the voltage at that core speed, it will probably be lower than what CPU-Z is telling you, as a consequence of some inefficiency in how EIST works. It's what's called underclocking. That's what EIST does. It dynamically underclocks(and undervolts), based on load. While I've been writing this, CPU-Z has shown me voltage of .336volts and many other low numbers. It's pretty interesting.

The clock speed is mostly at 4.2ghz to 4.4ghz even at 0.05v. I cant change the core clock as i'm using a H97 motherboard. I cant change the voltage is BIOS as well. Limitations of a H97 mobo.

 

[saternal]

Did you update BIOS?

Your board requires a newer version moving from your old to new CPU (.11 vs .10).

https://us.msi.com/product/motherboard/support/H97-GAMING-3.html#down-bios

Yup Bios updated to the latest. Wondering if its a problem with my motherboard sensor, BTW my temps are constant at 42c~

 

[dudmont]

If you look, I know you'll find a bios(it'll be a third party), that will support over-clocking. That's an H board, but it's a nice board designed for gaming. Back when I had a 1230v3 in my present system(z87 XPower), I was able to undervolt and underclock. It's an MSI board. I couldn't overclock that chip, but I could underclock it. Anyway. Enhanced Intel Speed Step Tech is simply a dynamic underclocking control device to lower power usage when the system doesn't need it. If you disable EIST in your bios, you'll see what computers used to do, which was run a constant clock and power usage.

 

[saternal]

If you look, I know you'll find a bios(it'll be a third party), that will support over-clocking. That's an H board, but it's a nice board designed for gaming. Back when I had a 1230v3 in my present system(z87 XPower), I was able to undervolt and underclock. It's an MSI board. I couldn't overclock that chip, but I could underclock it. Anyway. Enhanced Intel Speed Step Tech is simply a dynamic underclocking control device to lower power usage when the system doesn't need it. If you disable EIST in your bios, you'll see what computers used to do, which was run a constant clock and power usage.

Yup. It was EIST. I disabled in in bios rebooted and everything was fine. I then came back here and saw your post and recommendation. Problem solved. Its constant at 1.192 now. Thought problem was solved b4 reading ur post ur solution was actually the right 1. Thanks all for your help.

 

[J_E_D_70]

Hm. What is the ambient room temp? My slightly OC'd 3570k idles at 32C with an ambient of ~21C.

 

[dudmont]

Saterrnal, my pleasure.
I'm looking for a bios update(non-supported) that will give you overclocking capability with that board. Just in case you're interested. It's hard to find, MSI appears to have taken down the page that had a bios that would overclock K series chips.

 

[saternal]

Hm. What is the ambient room temp? My slightly OC'd 3570k idles at 32C with an ambient of ~21C.

I would say about 30c. Didn't think I'd need a water cooler if i'm not overclocking but seeing the temps now at 40c idle, I guess I should get 1 after all.

 

[saternal]

Saterrnal, my pleasure.
I'm looking for a bios update(non-supported) that will give you overclocking capability with that board. Just in case you're interested. It's hard to find, MSI appears to have taken down the page that had a bios that would overclock K series chips.

Thanks for trying but its fine. I'm happy the way it is. I'm not gonna overclock anyway. To think EIST brought my CPU down from 1.1v to 0.05v. Wow!! The speed is constant now at 4.2ghz on all cores.

 

[dudmont]

Yep, that's the stock 4790k settings. Hard to argue that isn't fast. From my google search, the page that had the non-supported H and B bios for overclocking K and 3258 have disappeared from MSIs site. Can't find a bios anywhere else either. If, you ever want to tinker with that chip, try either overclocking genie on the board itself or Intel's Extreme Tuning Utility, they might work.