i.bradley wrote:
>"Robyn J. Lyons" wrote: > > >>While it is okay in a native G3/G4 machine, you DO NOT want to turn >>speculative access on if you are using a g3 upgrade in a 601/3/4 >>machine. I forget what the reason is exactly but it has something to do >>with the firmware not knowing how to handle spec acc. correctly and >>causing errors and possibly crashing. >>- >> >I've enabled the speculative access and restarted and the machine seems >snappier, reading 33.2 MB/sec now, but running hotter. > >Eeek, after reading Robyn's reply above I think I'll turn it off again for >safety's sake and check the MB/sec speed again. > > True, there is a possibility that the firmware may not be able to handle it, but slim. The main reason is exactly what he experienced. It increases the the speed, which increases the current usage, which increases the heat, increased heat increases the circuitry resistance, which increases the current requirement, which increases the heat, etc., etc.,..... and the normal airflow is extremely inefficient to cool things down. If you want to turn it back on, put a fan on the heatsink, blowing down on to the heatsink. This should keep the processor and cache cool enough not to pose any problem. A good source of fans: if you have any old external HD cases that have bad PSs, cables or plugs, the fans in them are either 5 or 12 vdc, which either is readily available in the computer. I found one that the screw holes fit perfectly to the four holes in the PowerLogix circular heatsink. According the PowerLogix Profiler, the fan keeps things at a steady 32 deg C. -- Fred.... [EMAIL PROTECTED] http://www.imagine2020.com/737724502 -- SuperMacs is sponsored by <http://lowendmac.com/> and... Small Dog Electronics http://www.smalldog.com | Refurbished Drives | Service & Replacement Parts [EMAIL PROTECTED] | & CDRWs on Sale! | Support Low End Mac <http://lowendmac.com/lists/support.html> SuperMacs list info: <http://lowendmac.com/supermacs/list.shtml> --> 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]> Archive: <http://www.mail-archive.com/supermacs%40mail.maclaunch.com/> --------------------------------------------------------------- >The Think Different Store http://www.ThinkDifferentStore.com ---------------------------------------------------------------
