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Complete Overclocking Guide: Sandy Bridge & Ivy Bridge | *ASRock Edition* - Page 18

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post #171 of 9531
"Yea dont leave your cpu vcore on auto while overclocking because you can run into problems."

I'm not running into any "problems". I'm not trying to be a nudge here, but my system is not spiking voltages and is running cool and stable.

Now, that said, yes, I still do get speed fluctuations when running prime95 and OCCT, with speed dropping down to 4.2 or 4.3GHz at times. This does not happen, however, when transcoding video using Handbrake, the speed remains constant (as does my vcore). So I am curious about your settings above with offset that eliminate that variation. I will try that when I get home tonight (I really really should get back to work; geez, this stuff is addicting, even at my age). But I wonder if the fluctuation may be more an artifact of the stress tests and does not occur running a real-world app like Handbrake. Or just maybe certain types of programs.

Thanks Lucky.

marty
post #172 of 9531
tooter I will do my best to show you how simple this is and why you should understand the diference

Below posted is from my post and is true results from running prime 95
@4.0 auto OC max temps 56/61 - 52/58 @1.32-1.33V
@4.8 auto OC max temps 65/73 - 62/70 @1.41-1.48V
@4.8 DUDE OC max temps 60/66 - 57/63 @1.33/1.34V @17RUNS blend

As you can see letting my motherboard AUTO overclock at both 4.0 and 4.8 Speeds increases my VCORE higher then when I run it at manual (dude) settings at 4.8,

This increases Vcore might do several things but what it does do is increases heat and it will increase the Vcore to always make sure the cpu has plenty if not overkill on power available.

Compare my temps from AUTO 4.,8 to Manual 4.8 the differences are

AUTO
65/73 and 62/70 @1.41-1.48
vs
60/66 and 57/63 @1.33/1.34

now do you see the difference and all of this is proven using CPUZ, Realtemp, and hardware monitor made by cpuz company.

ps - i just setup a worklog please keep questions in there regarded to me but you can see how all my stuff is setup and has a lot of pictures!
Edited by nycste - 3/27/12 at 2:52pm
post #173 of 9531
nycste,

thanks for the reply. Now let me answer. I have not tried going to 4.8GHz. I have gone as high as 4.6GHz, and at auto my vcore only goes up to 1.32, something like that. Same at 4.5GHz. I can set this manually, but I will set it to the same vcore. Or if I do the offset, I get the same vocre. So at least up to 4.5GHz, I have seen no difference between any of the three vcore options in terms of actual vcore or the corresponding heat.

Do you get a huge arc rise in temps and vcore at 4.5, or does it run around 1.32? Maybe that's the difference, that beyond a certain multiplier setting, the vcore at auto will dramatically rise. I have not reached that threshold.

Heat is always the first thing I look at when I OC. I've been doing this for almost 10 years now. Also, before even trying to OC this thing, I did a lot of reading and the consensus seemed to be that the max vcore should be 1.4. I have not even approached that yet. However, my top sustained speed has been only 4.6GHz. At 4.7, my system immediately freezes. That has occurred several times. And based on what I have read across a number of forums, the sweet spot for this chip seems to be 4.5 to 4.7. I'm happy with 4.5, and at that speed, the vcore options have had no effect on my temps or my actual vcocre.

This is going to be a family computer. I want stability first and foremost, but at the fastest possible speed. That's why I'm happy to settle on 4.5GHz, as really, what difference in day-to-day use will it make if I get to 4.8? My personal experience is that when I have to make lots of manual adjustments to the mobo, it is less stable. I know that's what OCing is all about, what make it interesting, but this chip seems to OC itself! I will take what it gives me.

My e6600 OCed to 3.35 or something like that, but I had to make lots and lots of bios adjustments and really push the vcore. Yet at 3.2, it required minimal tweaks, and was infinitely more stable. That was my sweet spot, and five years later it is still running at that spot.

I'm still all ears, and I plan on trying the adjustments that lucky suggested. Should I get a wild hair some gray afternoon, maybe I'll really push the limits of this thing, and your suggestions are duly noted. Thanks nycste.

marty
post #174 of 9531
Quote:
Originally Posted by tootercomputer View Post

"Yea dont leave your cpu vcore on auto while overclocking because you can run into problems."
I'm not running into any "problems". I'm not trying to be a nudge here, but my system is not spiking voltages and is running cool and stable.
Now, that said, yes, I still do get speed fluctuations when running prime95 and OCCT, with speed dropping down to 4.2 or 4.3GHz at times. This does not happen, however, when transcoding video using Handbrake, the speed remains constant (as does my vcore). So I am curious about your settings above with offset that eliminate that variation. I will try that when I get home tonight (I really really should get back to work; geez, this stuff is addicting, even at my age). But I wonder if the fluctuation may be more an artifact of the stress tests and does not occur running a real-world app like Handbrake. Or just maybe certain types of programs.
Thanks Lucky.
marty

Usually everyone just recommends setting your vcore in bios through fixed or offset because auto can lead to unsafe voltages where if you have it set you wont have to worry about damaging your CPU.
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post #175 of 9531
I just ran dvd shrink and my speed was stable at 4.5, that was with the offset setting, and +0.015. Not sure why programs like prime and occt cause a drop in speed, but this was the second transcoding program I've used where the speed held steady. Geez, what a chip, never broke a sweat.

I'm going to set my vocre at 1.32 and leave it there. I'm very happy with my 4.5OC. If I was going to be the primary user of this system, I'd push it as it would go and would be tweaking settings like a mad mam. But again, this is going to be a family computer, I'm ready to stop and finish the build.

I'm pleased with the chip, pleased with the board, a bit nervous though as some have reported problems after a few weeks or months. I'll cross my fingers.

marty
post #176 of 9531
Quote:
Originally Posted by tootercomputer View Post

nycste,
thanks for the reply. Now let me answer. I have not tried going to 4.8GHz. I have gone as high as 4.6GHz, and at auto my vcore only goes up to 1.32, something like that. Same at 4.5GHz. I can set this manually, but I will set it to the same vcore. Or if I do the offset, I get the same vocre. So at least up to 4.5GHz, I have seen no difference between any of the three vcore options in terms of actual vcore or the corresponding heat.
Do you get a huge arc rise in temps and vcore at 4.5, or does it run around 1.32? Maybe that's the difference, that beyond a certain multiplier setting, the vcore at auto will dramatically rise. I have not reached that threshold.
Heat is always the first thing I look at when I OC. I've been doing this for almost 10 years now. Also, before even trying to OC this thing, I did a lot of reading and the consensus seemed to be that the max vcore should be 1.4. I have not even approached that yet. However, my top sustained speed has been only 4.6GHz. At 4.7, my system immediately freezes. That has occurred several times. And based on what I have read across a number of forums, the sweet spot for this chip seems to be 4.5 to 4.7. I'm happy with 4.5, and at that speed, the vcore options have had no effect on my temps or my actual vcocre.
This is going to be a family computer. I want stability first and foremost, but at the fastest possible speed. That's why I'm happy to settle on 4.5GHz, as really, what difference in day-to-day use will it make if I get to 4.8? My personal experience is that when I have to make lots of manual adjustments to the mobo, it is less stable. I know that's what OCing is all about, what make it interesting, but this chip seems to OC itself! I will take what it gives me.
My e6600 OCed to 3.35 or something like that, but I had to make lots and lots of bios adjustments and really push the vcore. Yet at 3.2, it required minimal tweaks, and was infinitely more stable. That was my sweet spot, and five years later it is still running at that spot.
I'm still all ears, and I plan on trying the adjustments that lucky suggested. Should I get a wild hair some gray afternoon, maybe I'll really push the limits of this thing, and your suggestions are duly noted. Thanks nycste.
marty

A family computer does in no way EVER need to be set to anything above stock speeds. My computer other then that 1 crash while playing 1 game which I cannot reproduce is fully stable at my current OC settings @4.8Ghz. Will I stay at this speed I really do not know because it offers literally almost no difference doing "FAMILY ACTIVITIES" and in terms of games it does even less. Sure benchmarks are fun and all that but to respond to your @4.5 my Vcore doesnt seem to matter statements your correct.

All i5 2500ks should hit 4.2-4.4 at STOCK VCORE thats right at stock Vcore which is why your able to leave it at stock auto settings. Do I recommend it nope but I would rather recommend you limit its range as others have mentioned. I also seem to run at the lowest of Vcores for a stable 4.8Ghz which is ideal but all that really does is saves me a few degrees in temps. And I am no expert these settings are actually from someone else.

Whatever you do, make sure power saving features remain on and that the PC always downgrades itself while running idle there is NO reason to run fully speed ESP if its a family setup.

Just my 2cents
post #177 of 9531
Heres my bios screenshots. Really cool feature w/ this UEFI bios, just though i would post them up

84689169.jpg

4155h.jpg

120328150705.png
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post #178 of 9531
^ Thanks for posting your BIOS settings! I may give them a try and see what I get on Vcore. ^

I'll compare your's to my 4.5g and let you know the results if interested.
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post #179 of 9531
Yea definitely thumb.gif
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post #180 of 9531
Hmm, I'll have to try a screen shot of the UEFI, that is cool.

Interesting thing happened. Set my vcore to fixed at 1.32, ran OCCT, and the vcore dropped precipitously to 1.22, and since I'm running with a mult of 45, I BSODed. I reset vcore to auto, ran OCCT, vcore was stable at around 1.30. I then reset vcore to offset, ran OCCT, and again, the vcore was stable at 1.29 - 1.30. I'm leaving it at offset, with the +0.015 setting which seems to work for me.

I've never had a vcore drop like that in any computer I've used that I am aware of. The monitoring software has gotten better, so who know what was happening in the Athlon XP+ days, but in the 4 - 5 Intel systems I've built over the past few years, I've always set the vcore to a fixed setting, and I've never seen a drop that this. Weird. But with the offset mode, it seems stable.

Also, if anyone is interested, I've set up this system in AHCI mode, but I would like to try to the smart response technology, get a small SSD and use it with a 1TB Black Caviar. But you need to set up your system in RAID. I dug around on google and found a way to reset the registry so that I can boot in RAID mode (I already had my RSTs installed). It worked like a charm. I've already installed the OS on the Caviar, and it looks like I should be able to add the SSD in a smart response raid configuration. I'm going to run this past a few storage forums first, but I think it might be a go.

marty
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