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Forum Index : Microcontroller and PC projects : RAM isn't everything.....

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Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9610
Posted: 09:26am 10 Jul 2020
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This is interesting.

I have been running an Intel NUC as my main machine(NUC7PJYH), and I had it fitted with 16GB of RAM.  That was working fine.

However, Intel's official specs said that the max RAM was 8GB.
I ignored that, cos I thought: 'Hey, 16GB is working!'

I had noted some system performance issues of late, mostly with system slow-down, and lag going back to just about Windoze 95 kind of response, even though I am running a fully up to date Windoze Ten system.

Purely out of interest, I removed one stick of 8GB RAM, so that the system only has the 8GB 'Recommended' maximum, and bloody hell........  

The machine is like a ROCKET now on 8GB, vs the 16GB that was in it.
It would seem that perhaps the extra RAM, although the system and Windoze Ten could see it, was not actually helping.

Apps now open as they should(no lag as before) and everything is good.  With 16GB, even drawing the desktop icons was SLOW.  Now, they are instant - despite halving the system memory!  

I DID NOTE that even with 16GB, and Windoze Ten saying there was 16GB available, the system never used more then 8GB.....

Hmmmmmmm.....

Interesting discovery.
Perhaps you actually DO need to listen to the manufacturer's specs!!!!  
Smoke makes things work. When the smoke gets out, it stops!
 
Poppy

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Joined: 25/07/2019
Location: Germany
Posts: 486
Posted: 11:33am 10 Jul 2020
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WOW, interesting.

nuc7pjyh SPECS

I would not have imagined that a more of RAM would even actively slow down.

I do have a 2007 DELL XPS 720 System and there is also a 8 GB max issue and actually I cannot understand why there is a restriction at all, though being some bigger than a NUC.
Edited 2020-07-10 21:38 by Poppy
Andre ... such a GURU?
 
matherp
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Joined: 11/12/2012
Location: United Kingdom
Posts: 10310
Posted: 11:49am 10 Jul 2020
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The restriction normally means there aren't enough address lines for more RAM as supported by the processor or one of the glue chips. The slowdown could be because both memory cards were being addressed in parallel.
 
vegipete

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Joined: 29/01/2013
Location: Canada
Posts: 1132
Posted: 04:13pm 10 Jul 2020
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  Grogster said  The machine is like a ROCKET now on 8GB, vs the 16GB that was in it.
It would seem that perhaps the extra RAM, although the system and Windoze Ten could see it, was not actually helping.

Don't worry. Microsoft will release a new update that will fix this 'rocket' bug.
Visit Vegipete's *Mite Library for cool programs.
 
cosmic frog
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Joined: 09/02/2012
Location: United Kingdom
Posts: 302
Posted: 05:23pm 10 Jul 2020
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My ZX81 always ran faster on 1k and slower on 16k  
 
hitsware2

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Joined: 03/08/2019
Location: United States
Posts: 719
Posted: 08:17pm 10 Jul 2020
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  matherp said  The restriction normally means there aren't enough address lines for more RAM as supported by the processor or one of the glue chips. The slowdown could be because both memory cards were being addressed in parallel.

Or maybe someways multiplexed , like was done back when switching over
from 8 to 16 bit ?
my site
 
Grogster

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Joined: 31/12/2012
Location: New Zealand
Posts: 9610
Posted: 05:12am 11 Jul 2020
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@ Poppy: Yeah, me neither.
@ matherp: Good point.  Excellent point, actually.
@ vegipete: LOL!   Please, God no.....  
@ cosmic frog: I had a ZX81 with 16KB RAM-pack, and I could never get the damn thing to stay connected!
@ hitsware2: Who knows.

On the plus side, things are definitely faster WITHOUT the extra 8GB, so now I have an 8GB RAM stick I can use for something else.
Smoke makes things work. When the smoke gets out, it stops!
 
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