How much VTT do You push into 45nm....???

[camouflage]

:D These days VTT becomes an important instrument when it comes to stable OCing.

But this voltage can also kill Your chip very soon if set too hi, INTEL recommends a max. of 1.45 - maybe up to 1.5 for a quick bench session.

So how much VTT do You push into Your 45nm chip ?

Please post only the max. & the duration - not Your safe 24/7 settings.

I.e. --------> 1.48 / 2 hours or 1.55 / 10 min. or 1.40 / always.

:welcome:

[gilgamesh1]

:D These days VTT becomes an important instrument when it comes to stable OCing.

But this voltage can also kill Your chip very soon if set too hi, INTEL recommends a max. of 1.45 - maybe up to 1.5 for a quick bench session.

So how much VTT do You push into Your 45nm chip ?

Please post only the max. & the duration - not Your safe 24/7 settings.

I.e. --------> 1.48 / 2 hours or 1.55 / 10 min. or 1.40 / always.

:welcome:

as low as 1.3

gilgamesh

[Eldonko]

1.5v max for benching, 1.2-1.3 24/7.

[_Stelios_]

Usually i use 1.5 when it comes to benching.. My cpu gives ~10-15 fsb from 1.4 to 1.5V

[Chri$ch]

on P35 Chipset max 1.30v (1.20v for 24/7). On P45 it need not more than 1.10v :D

[BenchZowner]

I've tortured my Yorkfields and Wolfdales with voltages up to 1.56V.
Max period with 1.56V was about 2 hours of benching.
Max period with 1.44V was about... days of 24/7 running :D

After I'm done with my current QX ( find a good replacement ) I will try to kill the chip using VTT.
I'll let it run 24/7 loaded with various VTTs ( starting from 1.4V ) and see when and if it'll die.

[Gr1mR34p3r]

1.20V-1.24V, max FSB with this board is only 480.

[Leeghoofd]

I've tortured my Yorkfields and Wolfdales with voltages up to 1.56V.
Max period with 1.56V was about 2 hours of benching.
Max period with 1.44V was about... days of 24/7 running :D

After I'm done with my current QX ( find a good replacement ) I will try to kill the chip using VTT.
I'll let it run 24/7 loaded with various VTTs ( starting from 1.4V ) and see when and if it'll die.

At first thought I would have lended you my Qx but on a second thought I rather NOT :rofl:

Max I gave her was 1.6 for some short benchmark runs... run the quad daily at 1.2 and the Wolfies at 1.1...

[mcoffey]

1.35 24/7 100% Bionic on my QX9770, EVGA 790i Ultra, OC'd 4.2 last 3 month
1.35 " " " " QX9650, EVGA 780i OC'd 4.125 last 8 months

Benching very's, but never over 1.45, but that's subject to change as I get board with things:)

andyc

[loonym]

Max for my giga x48t is 1.45v and I use it all for some benching with x3360. Max for the msi 780i is a lowly 1.313v and that is maxed all the time with q9550, waiting for either giga or msi 790i for that cpu.

[cadaveca]

1.4v max for me, did not notice any gains whatsoever, not even 1 mhz FSB. running @ 1.15v 24/7.

[prime81]

I've been running my E8500 with 1.5 FSB VTT for around 2 months now...no issues thus far.

Buddy of mine has an E8400 he's had around 1.5VTT for around 6 months now at 4ghz with no issues.

Anyway I just lowered it to about 1.3 in BIOS producing 1.23 in windows @ 4ghz, still rock solid stability.

[Cob]

Running my Q9450 @ 3.8ghz with 1.32v VTT on my Ip35 Pro.

Had to run well over 1.4v at a far lower clock speed on the X38 Maximus for the 2 weeks I owned the board.

[mrcape]

I always run it below 1.2v. Not for safety, but because that's where I get max FSB stability. Manually set GTLs and low VTT is better in my case all the way up to 580fsb.

[Razer]

I'm runing my E8400 at 1.45v for benching, and around 1.2v for daily use.

[jas420221]

1.5v max for benching, 1.2-1.3 24/7.:yepp:

[003]

After I'm done with my current QX ( find a good replacement ) I will try to kill the chip using VTT.
I'll let it run 24/7 loaded with various VTTs ( starting from 1.4V ) and see when and if it'll die.

What no! Send it to me if you would otherwise kill it! :yepp:

[philbrown23]

my max is 1.56 for benching sometimes 6 hours at a time usually not more though yeilds about 15-20 fsb gain, not a lot b ut just enough. 1.32 for 24/7 lose that 15-20 though with that low.

[Xvys]

I thought the maximum VTT was 1.15v for the 45nm cpu's? I used to run my system at 1.20v, but it is more stable at 1.10v. I run it at 513 x 8 = 4.1 GHz 24/7 with all the sub-voltages at their lowest levels.

BIOS SETTINGS:

cpu = 1.375v (1.35v under load)
ram = 2.0v (5-5-5-15 @ 1026 MHz)
NB = 1.25v
SB = 1.05v
VTT = 1.10v (FSB Term. voltage)
PLL = 1.50v

Performance Level = Enabled 2
Loadline calibration = Enabled (voltage damper)
Overcharge voltage = Disabled
CPU GTL = Auto
NB GTL = .61x

[TouGe]

Right now I am sitting @ 1.16V vtt and have never gone above 1.24V.

[Clint]

From what I understand 1.1v is default on my Gigabyte board, so my setting with +0.1v would give 1.2v then. This gives me a stable 467MHz FSB with my Q9300. Adding 0.1v gives another 15MHz. I believe 1.2v is within safe voltage.

[BenchZowner]

@Clint:
VTT aka FSB Termination Voltage Defaults:
Intel Core 2 65nm Series: 1.2V
Intel Core 2 45nm Series: 1.1V

For the 65nm chips I'd say max safe is 1.55V, and for the 45nm chips 1.4V

[DoObs]

MY DFI and VTT dont help my E8400 in benching ive seen it just makes in unstable over 1.3v

[scooter.jay]

I stay below 1.45v if i can as too many stories of wolfies bitting the dust so i have done my best to keep it alive.

[Clint]

@Clint:
VTT aka FSB Termination Voltage Defaults:
Intel Core 2 65nm Series: 1.2V
Intel Core 2 45nm Series: 1.1V

For the 65nm chips I'd say max safe is 1.55V, and for the 45nm chips 1.4V

Thanks for the input.:up:
That means I can set it to + 0.2v and feel pretty safe then?

I'm not really clear on FSB voltage in my boards bios is the same as FSB Termination Voltage, but it sure helps the OC with a few MHz.

[BenchZowner]

FSB Voltage = FSB Termination Voltage ;)
Yes, you can set it to +0.2V and not worry about your CPU at all :)

[camouflage]

:eek: Wow, just got my new E8400 - booting into WINDOWS 8x500 & 9x500 1:2 divider @ only 1.1 VTT.......:clap:

Never had a chip doing this..............;)

[Hyperhorn]

Had my Q9300(ES) @air just a few hours @1.45 (=max. on P5B), but would not go above 1.3V for daily use.
It's better to have a nice combination of CPU + mainboard/ chipset, than too much VTT. :yepp:

[eva2000]

since 45nm cpus, i've used between 1.1-1.35v because there hasn't been much noticeable gain past that for me on air/water on various boards

[camouflage]

:D Here's the screen with 1.1 VTT:

http://img444.imageshack.us/img444/7082/8x563pi7.th.jpg (http://img444.imageshack.us/my.php?image=8x563pi7.jpg)

:eek::up::eek:

[camouflage]

:D And here's another one 1.10 VTT @ 8x580:shocked::

http://img115.imageshack.us/img115/3781/8x580pg7.th.jpg (http://img115.imageshack.us/my.php?image=8x580pg7.jpg)

So I think it all depends on the CPU........;)

:welcome:

[soapman72]

I run my E8400 @ 3.8ghz with VTT set to 1.10v and Vcore @ 1.294v (load). Seems totally stable without bumping VTT. Stable for at least 5 hours on Prime that is.

[sirrealist]

:D And here's another one 1.10 VTT @ 8x580:shocked::

http://img115.imageshack.us/img115/3781/8x580pg7.th.jpg (http://img115.imageshack.us/my.php?image=8x580pg7.jpg)

So I think it all depends on the CPU........;)

:welcome:


:eek:

Wow.. that is ridiculous. Thats not 24/7 stable, is it?

Congrats on that man. Is it the x48 chipset that lets you set memory dividers? I cant push my FSB over 533 since the lowest I can go is 1:1 and thats the most my RAM will take.

[HDCHOPPER]

well eye have tried up to 1.6.v..just a copula min to try it
but what works best has been default 1.2v 24/7 (lo as my board goes) believe it or not

[camouflage]

:D My new E8400 is a very strange chip - doing this with only 1.10 VTT:

http://img115.imageshack.us/img115/3781/8x580pg7.th.jpg (http://img115.imageshack.us/my.php?image=8x580pg7.jpg)

But @ 1.12 VTT it doesn't even boot..............:eek:

:welcome:

[whatever]

E8200 550 FSB:
http://valid.x86-secret.com/show_oc.php?id=373214
VID: 1.0625 + 0.150V in BIOS. CPUZ shows me 1.256V.
VTT: 1.1V

[camouflage]

E8200 550 FSB:
http://valid.x86-secret.com/show_oc.php?id=373214
VID: 1.0625 + 0.150V in BIOS. CPUZ shows me 1.256V.
VTT: 1.1V

:D Nice - so it's a kind of weird, some chips need more than 1.4 VTT to do 500FSB & others run 550 - 580 with only 1.1:rolleyes:.

So I think it becomes more & more important not only to get a low Vcore chip but also a low VTT chip..........;)

:welcome:

[giorgos th.]

1.54V max for benching sessions..

[cadaveca]

1.64 for 8 hours yesterday by mistake...no real load though.

[BenchZowner]

LOL gj cadaveca :D
Next mistake 1.7V please :p:

[cadaveca]

I've actually got some instability now, I'm hoping it's corrupt OS.:confused:

[BenchZowner]

Hope it's not a "dead" CPU m8.
Good luck.

[HDCHOPPER]

is thier any app for reading VTT ?? other than haveing to read bios

[camouflage]

is thier any app for reading VTT ?? other than haveing to read bios

:D If Your BIOS can read VTT You can use EVEREST in WINDOWS to show VTT.;)

[nikk]

e8400 Q746A616 @ 1.2-1.3v vfsb for benching (can't really go below that for big fsb because of p5k mobo bios)

I thought the maximum VTT was 1.15v for the 45nm cpu's? I used to run my system at 1.20v, but it is more stable at 1.10v. I run it at 513 x 8 = 4.1 GHz 24/7 with all the sub-voltages at their lowest levels.

BIOS SETTINGS:

cpu = 1.375v (1.35v under load)
ram = 2.0v (5-5-5-15 @ 1026 MHz)
NB = 1.25v
SB = 1.05v
VTT = 1.10v (FSB Term. voltage)
PLL = 1.50v

Performance Level = Enabled 2
Loadline calibration = Enabled (voltage damper)
Overcharge voltage = Disabled
CPU GTL = Auto
NB GTL = .61x

at that fsb you are NOT running the lowest voltages with the p5k. take out a multimeter, i'm guessing (;)) you are running vnb @ 1.55v+, vtt @ 1.3v at best, and a pll of 1.7v+ in reality.

asus bios are like that:down:

[WFO]

LOL gj cadaveca :D
Next mistake 1.7V please :p:

Oh lordy. I wasn't going to admit to this but 2 weeks ago I flashed from bios 403 back to 219 on my maximus Rampage. I was consuming adult beverages while re-establishing my previously stable clock on a Friday tequila night. At some point during the session, the vtt got changed to 2.0. It was completely unintentional. :rolleyes: I'm not sure at what point it in the session it was changed but it ran a minimum of 35 minutes at full load and possibly as long as 2 hours. :shocked: I wouldn't have even noticed if I wasn't showing the vtt in the Everest sidebar option. I was double checking voltages because I was satisfied i had a nice stable clock. :eek: Don't drink and OC at the same time! ;) No apparent damage. Chip is doing fine. :)

[cadaveca]

Same culprit for VTT volts here..damn maximus bios is pretty flakey sometimes. That was on bios 1201...must be an issue with the board itself, rather than specific bios revision.

[BenchZowner]

Oh lordy. I wasn't going to admit to this but 2 weeks ago I flashed from bios 403 back to 219 on my maximus Rampage. I was consuming adult beverages while re-establishing my previously stable clock on a Friday tequila night. At some point during the session, the vtt got changed to 2.0. It was completely unintentional. :rolleyes: I'm not sure at what point it in the session it was changed but it ran a minimum of 35 minutes at full load and possibly as long as 2 hours. :shocked: I wouldn't have even noticed if I wasn't showing the vtt in the Everest sidebar option. I was double checking voltages because I was satisfied i had a nice stable clock. :eek: Don't drink and OC at the same time! ;) No apparent damage. Chip is doing fine. :)

LOL, nice one :D

Don't drink and OC at the same time! ;)
Doesn't matter to me... I'm feeding my HW with the same crazy voltages totally sober or not :p: ( If I'm not totally sober, I bet I won't be near a computer at the given time :p: )

[Dak9767]

1.6v @ 4.5Ghz on water for benching only.

[camouflage]

1.6v @ 4.5Ghz on water for benching only.

:eek: Wow - You really picked up a hungry beast there...............:p:

[BenchZowner]

1.6v @ 4.5Ghz on water for benching only.

Are you referring to VTT Voltage aka FSB Termination Voltage or CPU Voltage ( Vcore ) ?