E8400 Voltage worries

[Tempered81]

Originally posted by: AbnerDoon
Here is the at load screen I will get an idle one up tonight.

myurl

looks good 3.6 @ 1.248Vcore load is alright. will you crash or fail prime if you lower the vcore while staying at 3.6?

also, are you running that ram at 2.1v?

 

[AbnerDoon]

Yeah I just worry because the programs and bios say one thing but it shows up lighter. If I lower the Vcore any further then 1.3v I get an instant crash within an hour or two. Even at 1.35v usually around hour 11 or 12 the system would do a reboot with Prime going.

The memory is at 2v currently.

 

[OCGuy]

Yea the OP does seem a little high. I'm stable @ 1.3 in bios (1.272 in CPUZ) for 3.6ghz. My buddy's system I just helped OC got 3.6 @ 1.275 in bios.

 

[Tempered81]

99% of the people on this board have motherboards that work like yours does. You set the vcore in bios to 1.30. IN cpuz idle it will say 1.23 - 1.25volts. That's just the way things work, they call it Vdroop.

It's normal; also your mem can do 2.1 according to spd table. You seem fine, if you're trying to get 4.0ghz, you're going to need to set that bios vcore to like 1.38-1.42, vdimm to 2.1 @ 445mhz, and possibly increase your northbridge voltage, if any at all.

 

[Tempered81]

Originally posted by: Ocguy31
Yea the OP does seem a little high. I'm stable @ 1.3 in bios (1.272 in CPUZ) for 3.6ghz. My buddy's system I just helped OC got 3.6 @ 1.275 in bios.

OP:

Originally posted by: AbnerDoon
Now everything reads it at 1.23v to 1.25v during stress test.

I don't know what to make of it to be honest.

Ocguy31: That is a lower Vcore than both yours and your friends.

 

[OCGuy]

His/her quote says "During stress tests" which is taking into account Vdroop. I was referring to idleing Vcore.

 

[Tempered81]

Cpu Vcore is 1.23-1.25 stressing so it is 1.30 idle?

abnerdoon: do you have a cpuz idle screenshot otw?

 

[AbnerDoon]

I will tonight say 5 hours from now. Currently I'm at work and hoping that Prime is still running when I get home instead of the system having restarted itself again.

 

[AbnerDoon]

Here it is at the end of a 12 hour Prime run.

Prime

And here it is about 20 minutes later to cool down running idle.

Idle

 

[Tempered81]

Originally posted by: AbnerDoon
Here it is at the end of a 12 hour Prime run.

Prime

And here it is about 20 minutes later to cool down running idle.

Idle

cpuz says 1.24 v at 3.6g idle. Does that number fluctuate? If not you're idleing at a lower vcore than many others including ocguy31 & his friend.
is there still a problem? open cpuz main tab, realtemp 2.24, coretemp .971, and dual instances of orthos 2004. take a screenshot of that before and after 15 mins of priming. I'd like to see your temperatures. So far, everything looks nice.

Try lowering your vcore to the point that prime crashes, and see what the loaded vcore is for the freeze point at 3.6g

 

[AbnerDoon]

It seems to stay between 1.24v and 1.26v at idle. Though the 1.24v just seems to be occasional drop for a second or two.

I will have to try your suggestion tomorrow night with running dual Orthos and the other three programs as I just caught this too late here.

 

[amenx]

Surprised no ones mentioned this. Its the CPU batch that makes all the difference. The magical e8400s that do 4ghz @ 1.25v are usually from the Q745, Q743 batches while the Q748's need a lot more voltage to get up there. The Q746's are mixed. Whats your batch? You have the retail box? Its on the side of it.

Re the ram volts, just up it +.1 in the bios, no need to do it in EasyTune.

 

[AbnerDoon]

I'm not sure of the batch number. It was an oem and I didn't look before putting it on. Since I just bought it recently I would take a guess that it's from the later batches.

I'll up the ram later tonight in the bios and look through EasyTune in XP and see if it is there or at a lower voltage again.

 

[AbnerDoon]

Here it is at idle with 2 instances of Orthos, CPU-Z, CoreTemp and RealTemp.

Idle

And again under load for 15 minutes.

15 minute load

 

[Riverhound777]

Originally posted by: AbnerDoon
Here it is at idle with 2 instances of Orthos, CPU-Z, CoreTemp and RealTemp.

Idle

And again under load for 15 minutes.

15 minute load

Those are the exact same voltages as mine. I checked my settings and I have 1.35v in bios, 1.312 Idle, 1.28-1.296v load. Cept mine is stable at 4050mhz.

 

[Tempered81]

not bad, what happens when you run at 445mhz fsb?

 

[AbnerDoon]

I tried 445 but couldn't get it to boot just kept cycling and resetting the bios settings. Took it all the way up to 1.45v before giving up for the night.

 

[aigomorla]

Originally posted by: Baka
Well the max that I have heard is 1.3625V but like they said in the Asus790i Review your still safe with 1.5V.
So I would think youre still safe.

About the 1.5V

uhhh NO.

and NO.

With another NO.

and to end it a NO.

Under air the max safe is around 1.4. 1.45 is pushing it. Voltage is like crack to these guys. The more you feed it, it will go faster. But if you feed it too much you'll burn it out much faster.

Trust me on a 45nm chip you really dont want to push 1.4-1.45.

 

[amenx]

Originally posted by: AbnerDoon
Here it is at idle with 2 instances of Orthos, CPU-Z, CoreTemp and RealTemp.

Idle

And again under load for 15 minutes.

15 minute load

Why 2 instances of Orthos? Orthos does dual cores with one instance, dont you see the core 0 and core 1 showing there? Its the quads that need 2 instances.

 

[AbnerDoon]

I ran dual Orthos as someone asked me too. I believe to see what the core temps would be after 15 minutes.

Trust me on a 45nm chip you really dont want to push 1.4-1.45.

All right well 3.6ghz is good enough for me at the moment. I'll still play with it some more but to be honest I don't even have any games that are pushing it at that speed yet. Thanks for all the help everyone I will let you know if I can get it any higher later this week.

 

[Burrich]

Originally posted by: jaredpace
99% of the people on this board have motherboards that work like yours does. You set the vcore in bios to 1.30. IN cpuz idle it will say 1.23 - 1.25volts. That's just the way things work, they call it Vdroop.

It's normal; also your mem can do 2.1 according to spd table. You seem fine, if you're trying to get 4.0ghz, you're going to need to set that bios vcore to like 1.38-1.42, vdimm to 2.1 @ 445mhz, and possibly increase your northbridge voltage, if any at all.

What he said. I had to pump a decent amount of voltage to get about 3.6Ghz. What I didn't realize is the amount of vDroop I was getting hit with. I jumped in to OCing too fast and became confused, only to find out I had a bad stick of RAM. Now I have two good sticks and might try for 4Ghz again.

 

[Tempered81]

Originally posted by: amenx

Originally posted by: AbnerDoon
Here it is at idle with 2 instances of Orthos, CPU-Z, CoreTemp and RealTemp.

Idle

And again under load for 15 minutes.

15 minute load

Why 2 instances of Orthos? Orthos does dual cores with one instance, dont you see the core 0 and core 1 showing there? Its the quads that need 2 instances.

that was my fault, didn't realize it was stressing both cores in a single instance. Just wanted to see his temperatures. 50C CT & 40C RT... That is nothing to worry about...

 

[AbnerDoon]

Well even though I need sleep I couldn't resist one more night of frustration. I shot for 3.8ghz but failed time and again luckily for me 3.75ghz was well in reach.

OCCT 30min

OCCT 8min

OCCT 4min Idle

Orthos 15min, CPU-Z, CoreTemp, RealTemp & SpeedFan

If I can get Prime to run stable at these settings for 24 hours this weekend they will not change again. If anyone sees any problems with voltages or heat let me know and thanks for all the help this week.

 

[SilverBack]

Originally posted by: AbnerDoon
Robust Graphics Booster = Auto
CPU Clock Ratio = 9x
CPU Frequency = 3.60 (400x9)
CPU Host Clock Control = Enabled
CPU Host Frequency = 400
PCI Express Frequency = 100
C.I.A.2 = Disabled
Performance Enhance = Standard
System Memory Multiplier = 2.0
Memory Frequency = 800
DRAM Timing Selectable = Auto

Memory is all on auto timings.

System Voltage Control = Manual
DDR2 OverVoltage Control = Normal
PCI-E OverVoltage Control = Normal
FSB OverVoltage Control = Normal
(G)MCH OverVoltage Control = Normal
CPU Voltage Control = 1.35v
Normal CPU Vcore = 1.15v

I've tried with 2 sticks of ram it still responds the same no changes.

Thanks for that listing of settings. I have the DS3L coming in tomorrow to replace my p965-DS3 3.3
I'm also getting an e8400 cpu and new memory ( G.SKILL 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 1066 (PC2 8500) to the mix.
I'm planning on running it at 4GHz, I will be running it on my current water system.

 

[AbnerDoon]

Glad it helps somebody out. Only two things have changed in that list to get it to 3.75ghz so far.

1. CPU Host Frequency = 417
2. DDR2 OverVoltage Control = +0.1v

Everything else is still the same.