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post #6871 of 67355
Quote:
Originally Posted by os2wiz View Post

what is the default CPU voltage frequency on a Crosshair V? I have ultra LLC setting and 310 Feb and 15 multiplier. Any recommended setting for CPU voltage frequency. Right now 2400 nb-cpu frequency 2400 dram frequency and 2400 HT-Link frequency. CPU voltage 1.443 v.

Default cpu volt%e is not determined by the motherboard to my knowledge. I believe its factory settings of your chip that determine that. Because you can have 2 of the exact same chip but they will both has different default voltages.
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post #6872 of 67355
Quote:
Originally Posted by MistrEd View Post

I may have missed it somewhere in this thread. Where did this AMD linpak come from for IBT? Did the developer make it? I have not come up with any information of the origin of it.

I posted it here originally, but people still seem to want to tell me all about how much more stressful it is. rolleyes.gif It came from the official IBT thread at ExtremeSystems. If you need a copy someone here can upload it, or I can do it later when I get in from work. smile.gif

It could do with being added to the OP really.
Quote:
Originally Posted by os2wiz View Post

My G Skill Trident 1866 dram with XMP of 8-9-9-24 does 2400mhz with timings of 10-11-11-31 no problems.. Its better than the so-called Samsung Wonder ram.

My 'so-called Samsung wonder RAM' does 2400Mhz with 10-10-10-28 and 1.575v, so there. tongue.gif Shame my 8350 is the worst clocker here! rolleyes.gifbiggrin.gif
post #6873 of 67355

I'm busting to push my 8350 over 1.6v to see if I can get 5Ghz IBT (with AVX) stable. I've probably got the temp headroom, core temps at 1.58v are high 40s to low 50s and socket temp isn't over 65. I just don't really want to be having to buy another 8350, although to be fair this one's a crap clocker so maybe I should kill it for the excuse to replace it! tongue.gif

Does anyone know if the core voltage sensor is in the CPU or on the mobo? I'm guessing it's on the mobo, I think my next board will be one with voltage measuring points.
post #6874 of 67355
Quote:
Originally Posted by Zeek View Post

Any of you that are around 4.8ghz-5ghz mark, what are your cinebench scores? I get a 8.08 with a 4.93ghz on my 8120 and want to know how much better the 8320 will be.

heres mine on 8350. i did a few for u from 4.8-5.0ghz

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post #6875 of 67355
Quote:
Originally Posted by wolvers View Post

I'm busting to push my 8350 over 1.6v to see if I can get 5Ghz IBT (with AVX) stable. I've probably got the temp headroom, core temps at 1.58v are high 40s to low 50s and socket temp isn't over 65. I just don't really want to be having to buy another 8350, although to be fair this one's a crap clocker so maybe I should kill it for the excuse to replace it! tongue.gif

Does anyone know if the core voltage sensor is in the CPU or on the mobo? I'm guessing it's on the mobo, I think my next board will be one with voltage measuring points.

yes mobo i think as i cant put 1.6 in bios as it says voltage over current kicks in lol. or something like that
i have to stick 1.6 and over in via asus suite biggrin.gif

unless anyone knows of a settng in bios i can disable to avoid this thumb.gif
Edited by gertruude - 1/11/13 at 5:38am
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post #6876 of 67355
Quote:
Originally Posted by gertruude View Post

yes mobo i think as i cant put 1.6 in bios as it says voltage over current kicks in lol. or something like that
i have to stick 1.6 and over in via asus suite biggrin.gif

unless anyone knows of a settng in bios i can disable to avoid this thumb.gif

Any luck with enabling this?


Edited because I can't read o.o

Okay. There is a setting, but it's absent from my motherboard...
Quote:
CPU Voltage Over-Current Protection: Extends the current trip threshold before the CPU VRM will shut-down. Increase to facilitate overclocking (higher current draw).

Edited by Tarnix - 1/11/13 at 6:56am
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post #6877 of 67355
Quote:
Originally Posted by gertruude View Post

heres mine on 8350. i did a few for u from 4.8-5.0ghz
Thanks for that. Quite the little performance increase with the 8350. Gonna see what MC has this weekend thumb.gif
post #6878 of 67355
Hi guys!

IMHO, after spending the good part of a week playing with 2 different FX-8350's and different stress testing programs, I put little faith in IBT as a stress testing tool.

OCCT and prime95, yup, these really push system to the limit

IBT, nope, just does not do it.

Why do I say this, well its simples, OCCT and Prime95 need so much more voltage to be *stable*

Example

On the FX-8350 that im keeping, IBT custom 6000mb 10 runs, competed at 5ghz with only 1.47125v volts.

OCCT and prime95 on the other hand need 1.55v to even become near stable !!

That is a huge jump, I dont have much faith in IBT because of this.

It was a similar story with the other FX-8350.

Anyhow, peeps dont have to agree, just the hardcore, like myself, would probably vouch for prime95 then OCCT for the extreme stability test, with some gaming.

IBT just doesnt cut the mustard....
post #6879 of 67355
I personally don't consider my system stable after before a week of Crysis / OpenGL/ Heaven bench/Folding activity. IBT is just an appetizer to me.

edited cause I can't write o.o
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post #6880 of 67355
Quote:
Originally Posted by gertruude View Post

yes mobo i think as i cant put 1.6 in bios as it says voltage over current kicks in lol. or something like that
i have to stick 1.6 and over in via asus suite biggrin.gif

unless anyone knows of a settng in bios i can disable to avoid this thumb.gif

It's probably a good thing. I've been getting much more stable Overclocks by enabling the higher amperage settings, and increasing the CPU Power frequency to 350 (I might try it at 400 soon)
I also switched T-Probe to Extreme so it doesn't throttle at all.

Since Watt = V x A, IMO it's better to allow for higher amperage, so the voltage can stay steady (while the Amperage Requirement fluctuates), and isn't generating extra heat.
Quote:
Wiki: The AM3+ Socket offers improved power regulation and power quality specifications, including an increased maximum current support of 145 A versus 110 A
Example
- 200W = 1.6v x 125A
or
- 200W = 1.53v x 130A

I can't find any specs on what the stock limit is on amperage, and it's probably different per board. (possibly starts at the AM3 spec of 110A?)
Asus has the increase amperage setting for 130%, so 110A x 1.30 = 143A - coincidence?

So since every CPU is different based on leakage and quality etc. It might be possible to figure out the requirements at the point where you need a large voltage increase.
Example:
- From 4.5Ghz to 4.6Ghz needs three notches in vCore - 1.35 to 1.38
- From 4.6Ghz to 4.7Ghz needs six notches in vCore - 1.38 to 1.44
You can assume that your amperage needs have risen passed the stock setting. So 110% increase to amperage (up to 121A) you might be able to run 4.7Ghz at 1.41v

This is not to be taken as 100% accurate, but is a combination of facts that I have found, mixed with my own testing, and observations.

Interesting testing would be if someone with a Kill'a'Watt could measure the Watts at idle and Prime Load at a few different Overclocks (4.2-4.8)
Then you could take the difference in Watts (idle/load) and divide the vCore. When graphed it will show if there is a linear increase in Amperage requirements per Overclocked. So you could estimate how far you could push your CPU, within your personal limits.
Edited by ComputerRestore - 1/11/13 at 8:10am
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