ch-5 over 3 volts

[jeredien]

has most of the people with a voltage of over 3 volts on thier ch-5 reach decent fsbs? im looking to hit 240 with my sticks they do 222 @ 2.7 in bios no problem and prime stable. if you run your ch-5 over 240 what are your volts and what is the stick size 512 or 256 and how many volts?

[golfer49]

Winbond CH5 chips have internal voltage regulation set at 2.75 volts, so if you run 3 volts, is will more than likely be much less.................check with memoryman for more details.

[Titan7171]

Im running 240mhz @ 11,2,2,2 @ 3.15v, 2x256mb sticks

[rc7]

Golfer, I believe that is only with the buffalo modules. The regulator is in the pcb not the chip.

[MegaDan]

Yeah, many many many people have been doing 230+ fsb above 3v with their ch5 mem...http://forums.amdmb.com/showthread.p...hreadid=307360

Im prouldy one of them

[runbabyrun]

Sh#t! The reason was so simple and I missed that. That's why my Buffalo 2x256 (ch-5) couldn't do as well as other people's sticks.

Originally posted by rc7 on 03-27-2004 at 04:35 AM
Golfer, I believe that is only with the buffalo modules. The regulator is in the pcb not the chip.

[memoryman]

The voltage limiter is in the chip- not the Buffalo PCB.

Apparently, enough voltage turns off the limiter. It appears the limiter "overloads" right around 3.1 to 3.2Vdimm. At that point, CH-5 starts working more like BH-5.
I am not suggesting everyone try this.....

[MrNovi]

I've run a 512 stick of Buffalo PC3200 w/WB CH-5 on my DFI Ultra Infinity at 250fsb at 3.3v. Passed Memtest no prob, but it had trouble with Prime95. It passed Prime at 245. It even passed Prime and Memtest at 240 in DC mode with a 512meg stick of Buffalo PC3700 w/BH-5.

Please note that the chips got REAL WARM at 3.3.

Mr. Novi

[memoryman]

There will definately be more power (heat) buildup in the RAM, at these higher voltages. People who use these higher voltages need to ensure that there is ample airflow supply to the RAM area.

[sobol]

memoryman so limiter is evry brand CH-5 modules ? like in TwinMos ? my run 200mhz 11-2-2-2 at 3.2 stable.

[sobol]

I got on my ram Nexus Copper King Heat spreaders
( http://www.skenegroup.net/en/articles/nexus_hs )
and theyre pretty hot. What is my problem i got plenty of stickers/labels... also warranty... on my ram chips , im wondering should i remove them or its no differ ? hs have thermal tape that stick to chips.

[MrNovi]

memoryman so limiter is evry brand CH-5 modules ? like in TwinMos ? my run 200mhz 11-2-2-2 at 3.2 stable.

My CH-5 will run 2-2-2-11 at 200MHz at 2.7v. I only need more than that to run above 225.

Mr. Novi

[memoryman]

The limiter is built into the Winbond die. It is in every module from every manufacturer that uses the Winbond CH-5s.

Mr. Novi-
I've been running memtest86, just under 500 (248) at 11-2-2-2 on DFI LanParty NFII ultra, for over a week at 3.3Vdimm. My DIMMs are barely warm, but the motherboard isn't in a case and the MB has a fan lightly blowing on the memory (it's actually a heater without the heat turned on - so it doesn't blow fast).
The DIMMs just seem to need more air at that voltage.

I figured if everyone that can pump the Vdimm up to 3.1+ on CH-5s is going to try this, we better do it as well.

[mrlobber]

Originally posted by memoryman on 04-01-2004 at 01:21 AM
I figured if everyone that can pump the Vdimm up to 3.1+ on CH-5s is going to try this, we better do it as well.

[memoryman]

I'm going to turn the fan off and cover up the board to see if I can get a more realistic heat environment going for the memory.
I've noticed the southbridge gets really hot at these speeds.

edit - the memory didn't get much warmer w/o the fan - but the SB is definitely hotter.