on 10/24/03 2:31 PM, Power Computing List at [EMAIL PROTECTED] wrote: > Power Computing is sponsored by <http://lowendmac.com/> and... > > 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Power Computing Digest #1076 > > 1. G3 upgrade, remove cache SIMM now? MaxPower CP settings > 2. Re: G3 upgrade, remove cache SIMM now? MaxPower CP settings > > Power Computing list info: <http://lowendmac.com/power/list.html> > --> AOL users, remove "mailto:"; > Send list messages to: <mailto:[EMAIL PROTECTED]> > To unsubscribe, email: <mailto:[EMAIL PROTECTED]> > For feed mode, email: <mailto:[EMAIL PROTECTED]> > Subscription questions: <mailto:[EMAIL PROTECTED]> > List archive: > <http://www.mail-archive.com/powercomputing%40mail.maclaunch.com/> > > > ---------------------------------------------------------------------- > > From: [EMAIL PROTECTED] > Message-ID: <[EMAIL PROTECTED]> > Date: Thu, 23 Oct 2003 22:25:50 EDT > Subject: G3 upgrade, remove cache SIMM now? MaxPower CP settings > > Hello all, > > I recently put a Newer MaxPowr G3/400 daughter card into my PowerCenter 150,= > =20 > and am loving it! Since the G3 card has a 1mb backside cache, I removed the= > =20 > 1mb cache SIMM I originally had in its motherboard slot. > > I then noticed that the MaxPowr control panel gives me the following choices= > =20 > for motherboard cache: > 1. On > 2. Off > 3. On if larger than backside > > So I put the SIMM back in its slot, and selected "on", since it is not large= > r=20 > than the backside cache. I have not noticed any difference since putting th= > e=20 > SIMM back...is there any advantage to leaving it in? > > Some incidental questions concerning the MaxPowr CP settings: > > What would be the effect of changing the cache speed in the menu to faster o= > r=20 > slower than the default 200 mHz(half of the 400 clock speed)? Advantages?=20 > Disadvantages? > > How about the choice of "Write back - faster"(the default setting) vs.=20 > "Write-through"? I guess faster is better, but guess I just would like to k= > now what=20 > these mean. > > The CP's default setting for "Memory timing optimization" is 70ns. I imagin= > e=20 > some of my RAM DIMMs are 60ns, but can't remember ...some may be 70ns. Best= > =20 > to leave at 70ns setting? > > Thanks for any feedback you can supply! > > Saul Broudy > Philadelphia, PA USA > ------------------------------- > My Macs: > > PowerCenter150 G3/400 > PowerMac 7600/150 > PowerMac 7100/80 > PowerMac 7100/66 > Two IIci's > Three Mac Plusses > SE/30 > Quadra 800 PPC > Color Classic > Two Duo 230=92s > Outbound notebook(pre-Powerbook Mac clone) > Two Powerbook 520c's > Powerbook 140 > Powerbook 1400c/133 > PB 1400cs/117 > PB 5300c/100 > Newton MessagePad MP2100U > --------------------------- > > > ------------------------------ > > Date: Fri, 24 Oct 2003 01:28:51 -0500 > Subject: Re: G3 upgrade, remove cache SIMM now? MaxPower CP settings > From: Robert H. Baucom <[EMAIL PROTECTED]> > In-Reply-To: <[EMAIL PROTECTED]> > Message-Id: <[EMAIL PROTECTED]> > > > On Thursday, October 23, 2003, at 09:25 PM, [EMAIL PROTECTED] wrote: > >> Hello all, >> >> I recently put a Newer MaxPowr G3/400 daughter card into my >> PowerCenter 150, >> and am loving it! Since the G3 card has a 1mb backside cache, I >> removed the >> 1mb cache SIMM I originally had in its motherboard slot. >> >> The CP's default setting for "Memory timing optimization" is 70ns. I >> imagine >> some of my RAM DIMMs are 60ns, but can't remember ... some may be >> 70ns. Best >> to leave at 70ns setting? > > **************** > HORRORS, If you are mixing DIMMs with differing speeds, you may well > expect erratic operation and crashes! > RHB > > ***************** >> >> Thanks for any feedback you can supply! >> >> Saul Broudy >> Philadelphia, PA USA >> ------------------------------- > > > ------------------------------ > Power Computing is sponsored by <http://lowendmac.com/> and... > > 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> > > Support Low End Mac <http://lowendmac.com/lists/support.html> > > Using a Mac? Free email & more at Applelinks! http://www.applelinks.com > > End of Power Computing List Digest #1076 > ****************************************
Here are some of my observations and also what I read or found out from the balloon help and popup balloons. For the write thru: It is recommended to enable the write-through mode for pre G3 machines. "Some devices are incompatible with the backside cache if not in the write-through mode" Powerlogix ballon help Now for the motherboard cache: I have had 2 different experinces with it. I had a Powerlogix G3 300 in my Power Tower Pro. The manual said to remove it since using it is slower than the backside cache. I did that and ran without the motherboard cache with no problems for 4 years. I did save the cache incase I later needed it. I recently picked up an XLR8 G4 450 new in the box off of ebay. I install it with the motherboard cache removed and the memory interleaved as normal. I tried to boot but no luck. Installed the G3 back in and it booted with no problem. So I sent it back and got a replacement from the guy. I thought the board may be bad. Got the new one tried it again and it wouldn't boot either. So, I look around and found xlr8yourmac.com and read about some problems and one solution was to de-interleave the memory. I did this and the machine booted fine. I wanted to have the speed gain of the interleaved memory though. So a little more searching and tinkering. I next tried putting the motherboard cache back in and it booted up fine. I went to the XLR8 control panel and did a software disabling of the motherboard cache. It is advised to disable it and use the quicker backside cache. Since everything is working fine why not just let it be? No, I'll be brave and try one more little thing. I've got it to work I'll just revert back if it doesn't boot. I re-interleaved the memory and booted up and it worked. Backside cache speed: With the G3 card I had it was rated at 1:1 and it ran fine at 300/300. With the G4 card that was rated at 2:1 (450/250) it was a different story though. When copying files from my other networked macs the computer would lockup at times. I read the faq and it said to back off the cache speed to solve the problem. I did so and this worked with it now running at a 5:2 (450/180) ratio. I have one of the dip switch adjustable cards that allows you to speed up or slow down the processor. The faq says to slow the processor down and try kicking back up the backside cache again. I did this and am now running fine at a 2:1 (440/220) ratio. "The small loss to the processor is made up by a larger gain to the backside cache" XLR8 manual You will just have to test out the backside cache speed and see what works the best for you machine. I don't have the option for adusting the speed of the memory. You don't want to set it to low (faster memory) because, your slower memory will not work properly. Please forgive any misspellings. Jon Peterson Montgomery, IL -- Power Computing is sponsored by <http://lowendmac.com/> and... 123Inkjets.com <http://lowendmac.com/ad/123inkjets.html> Support Low End Mac <http://lowendmac.com/lists/support.html> Power Computing list info: <http://lowendmac.com/power/list.html> --> AOL users, remove "mailto:"; Send list messages to: <mailto:[EMAIL PROTECTED]> To unsubscribe, email: <mailto:[EMAIL PROTECTED]> For digest mode, email: <mailto:[EMAIL PROTECTED]> Subscription questions: <mailto:[EMAIL PROTECTED]> List archive: <http://www.mail-archive.com/powercomputing%40mail.maclaunch.com/> Using a Mac? Free email & more at Applelinks! http://www.applelinks.com
