user111818: I am a newbie to bitcoin. I am trying to sync a full node on my low end PC: 2g RAM, dual-core 2ghz, 250 gb regular HDD. It is in pruned mode. The initial 15% synced in a few days but now the process is fluctuating wildly around 2-7 weeks. Suffice to say it is very slow.
My main question is: how much will adding some RAM improve the syncing speed? And will adding new RAM reset the blockchain download?
I have already adjusted these settings: dbcach=900, banscore=10, listen=0
I am worried that putting in the RAM will "reset" the blockchain download and I will have to start syncing from 0% again. This already happened to me when I was tinkering with the dbcache setting - Which I will have to do again in order to take advantage of any new RAM(right?).
Anyway I hope that was a coherent question. Any response is very appreciated. :)

user109558: 
The initial 15% synced in a few days but now the process is fluctuating wildly around 2-7 weeks. Suffice to say it is very slow.

This happens because the very first blocks were pretty munch empty, so it's easy to verify.

I am worried that putting in the RAM will "reset" the blockchain download and I will have to start syncing from 0% again.

No, it doesn't.
There are numerous things that impact how fast your Bitcoin Core will sync, your HD speed, internet bandwidth, RAM, how good is your CPU… That said, -dbcache changes how many things we cache, cached things = less disk access, so it should increase performance, BUT it's not a linear thing; more RAM not necessarily means faster sync.

111818: <p>I am a newbie to bitcoin. I am trying to sync a full node on my low end PC: 2g RAM, dual-core 2ghz, 250 gb regular HDD. It is in pruned mode. The initial 15% synced in a few days but now the process is fluctuating wildly around 2-7 weeks. Suffice to say it is very slow.</p>
<p>My main question is: how much will adding some RAM improve the syncing speed? And will adding new RAM reset the blockchain download?</p>
<p>I have already adjusted these settings: dbcach=900, banscore=10, listen=0</p>
<p>I am worried that putting in the RAM will &quot;reset&quot; the blockchain download and I will have to start syncing from 0% again. This already happened to me when I was tinkering with the dbcache setting - Which I will have to do again in order to take advantage of any new RAM(right?).</p>
<p>Anyway I hope that was a coherent question. Any response is very appreciated. :)</p>
 109558: <blockquote>
<p>The initial 15% synced in a few days but now the process is fluctuating wildly around 2-7 weeks. Suffice to say it is very slow.</p>
</blockquote>
<p>This happens because the very first blocks were pretty munch empty, so it's easy to verify.</p>
<blockquote>
<p>I am worried that putting in the RAM will &quot;reset&quot; the blockchain download and I will have to start syncing from 0% again.</p>
</blockquote>
<p>No, it doesn't.</p>
<p>There are numerous things that impact how fast your Bitcoin Core will sync, your HD speed, internet bandwidth, RAM, how good is your CPU… That said, <code>-dbcache</code> changes how many things we cache, cached things = less disk access, so it should increase performance, BUT it's not a linear thing; more RAM not necessarily means faster sync.</p>
