FSB OverVoltage Setting

[lightstar]

I have the FSB OverVoltage Control set to +0.1V right now on my DS3L motherboard @ 374 FSB/ 1.418V. . . .is it safe to go higher on the FSB overvoltage setting & will it help with system stability or further overclocking? THX

 

[OCChronic]

IF you have added cooling on the north bridge
AND
a low ambient/room temps
AND
good case airflow then I would chance it.

Otherwise don't mess with the MCH overvoltage too much. This setting is for extreme FSB overclocking(400+). Keep your eye on MCH temps and voltages during gaming and high memory/CPU usage. Stay below 60C to be safe.

 

[lopri]

Sounds like the OP is talking about vFSB, not vMCH or vCore. I don't have a Gigabyte board so I can't say for sure, but with decent cooling I'd try +0.2V for FSB without too much worry.

 

[lightstar]

thanks for the responses 🙂 i didn't wanna blow up my new quad. . . .tried +0.2 vFSB & +0.1 vMCH which didn't seem to do too much. . . .adding a ultra kaze fan to the heatsink helped eeke out a little more from the overclock

 

[OCChronic]

*** UPDATE ***

I am using +0.25v FSB voltage and it is so far working well. My nb temps are 56c MAX under FULL LOAD. =) I'm using a P-III fan(40mm) on the nb heatsink to cool it down.

I'm now running:

+.25v on the FSB voltage
102Mhz PCI-E BUS
INTEL CORE 2 DUO E8400 @
1.3625v(act. 1.328v - 1.360v)/3800MHz/475FSB/
2 x 1 GB Corsair Dominator DDR2 1067/C5 @
2.25v/5:6 ratio/1140Mhz/CL5,5,5,18,2T, TRD7('turbo')
2 x 500GB RAID '0' array
ASUS 8800 ULTRA overclocked @
660Mhz-GPU/1630Mhz-SHADERS/2300Mhz-DDR3

Everest 4.5 Ultimate SCORES:

Memory Read: 9845 MB/s
Memory Write: 10074 MB/s
Memory Copy: 9901 MB/s

memory Latency: 52.3 ns

So far, everything is rock-solid stable and I've given it the Prime95 12 hr. blended test, on both cores, while doing my ebay thang on the net and watching movies.

 

[toadeater]

FSB on Gigabyte boards is the Southbridge voltage, so your NB temp isn't going to tell you anything. Touch the Southbridge heatsink with your finger, if you can't keep your finger on it for ten seconds it's too hot. +.1v would be the most I would try without active cooling on it. I don't think you even need to overvolt it much under 500 FSB.

 

[OCChronic]

Heyya =)

I think vFSB or 'FSB Overvoltage' is the voltage for the FSB itself, seperate from the MCH north bridge voltage. If I increase the 'FSB Overvoltage' by +0.25v, I can run my E8400 @ 475 MHz x 8(3800MHz CPU, 1900MHz FSB), 'Performance Enhance' @ Turbo(tRD = 7), DDR2 @ 1140Mhz(5:6 RATIO).

That's how I'm getting such good memory bandwidth out of an E8400 and decent DDR2 1066. I don't even use the '(G)MCH Overvoltage' setting as it always made my system unstable unless I left it at auto. I'm also running an ASUS 8800 ULTRA(G80, 128 SHADERS, 768MB) and it's overclocked to the max too. On top of that, throw in 3 500GB WD Platters @ RAID '0', with SATA II, NCQ, 16MB Cache and that's a lot of data moving through the X38 & ICH9R, at the same time.

I find that having a 3 x 500GB RAID '0' setup definitely reduces disk loading times for games and deathmatch servers, etc and also multi tasking is improved because there's less wait time during simultaneous disk reads across multiple applications that are running.

 

[kpo6969]

Originally posted by: toadeater
FSB on Gigabyte boards is the Southbridge voltage, so your NB temp isn't going to tell you anything. Touch the Southbridge heatsink with your finger, if you can't keep your finger on it for ten seconds it's too hot. +.1v would be the most I would try without active cooling on it. I don't think you even need to overvolt it much under 500 FSB.

toadeater,
question for you
I was under the impression with the DS3L there was no way to monitor the temps on the NB or SB. If I'm incorrect that would be great since that would be a great help. I've been leary to add any voltage other than vcore and ram. Thanks