cores x threads = amount of ram ?

Carfax83

Diamond Member
Nov 1, 2010
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Never heard of that. The amount of memory is determined by:

1) How much memory your motherboard supports

2) What programs and or applications you'll be running.

3) Whether you're running a 32 or 64 bit OS.
 

Eeqmcsq

Senior member
Jan 6, 2009
407
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Never heard of that. The amount of memory is determined by:

1) How much memory your motherboard supports

2) What programs and or applications you'll be running.

3) Whether you're running a 32 or 64 bit OS.

4) And how much you want to pay.
 

SPBHM

Diamond Member
Sep 12, 2012
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if you don't know the amount of memory you need, you probably need less than 8GB.
 

biostud

Lifer
Feb 27, 2003
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No, the correct formula is: What software am I going to run, and how much memory will it use?
 

denden42

Member
Jul 21, 2013
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I asking that question because I've read it from a book entitled Building a Perfect PC.
just like when you have core 2 duo. it has 2 cores, 2 threads so it must have a 4gigs of ram the author said.
 

Ben90

Platinum Member
Jun 14, 2009
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Every computer since the dawn of time had at least a billion bytes of memory.
 

mv2devnull

Golden Member
Apr 13, 2010
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I asking that question because I've read it from a book entitled Building a Perfect PC.
just like when you have core 2 duo. it has 2 cores, 2 threads so it must have a 4gigs of ram the author said.
I bet that line of thought was somehow influenced by the use of 32-bit Windows (applications).

If you have an application that can use, will use, and clearly benefits from 1 TiB of RAM, then you pay for it. If your applications' memory usage is hampered with artificial license restrictions, then you buy less.
 

Eeqmcsq

Senior member
Jan 6, 2009
407
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I asking that question because I've read it from a book entitled Building a Perfect PC.
just like when you have core 2 duo. it has 2 cores, 2 threads so it must have a 4gigs of ram the author said.

Hahahaha, holy cow, did the author really write that? So by that logic, if I happen to be on an older single core CPU, and I want to open and edit a very large image, he would still recommend only 2GB of RAM on that computer?

RAM amount is determined by how much your OS + apps need, and then limited by the motherboard, the OS 32/64-bit architecture, and your wallet. That's the same thought process whether you have a single core or a 100 core CPU.

I'm still shaking my head at the author's logic.
 

Techhog

Platinum Member
Sep 11, 2013
2,834
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6x12=72
8x8=64

Well, looks like LGA 2011 and FM3+ boards have been doing it wrong
 

VirtualLarry

No Lifer
Aug 25, 2001
56,572
10,208
126
Well, for distributed-computing apps, there can be a sort of core-to-mem ratio. Generally, you take the average working-set per core, rounded up to the next GB, and then multiply that by the number of cores (or possibly threads).

I find 2GB per core the absolute minimum. Some DC projects like 8GB per core.
 

PhlashFoto

Diamond Member
Jun 21, 2003
3,892
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First thing wrong with the book is the title.

Second thing wrong with the book is its logic.

Burn that book.
 

Matt1970

Lifer
Mar 19, 2007
12,320
3
0
I asking that question because I've read it from a book entitled Building a Perfect PC.
just like when you have core 2 duo. it has 2 cores, 2 threads so it must have a 4gigs of ram the author said.

That's the problem when you make shit up as you go along. A lot of times you are wrong.
 

aigomorla

CPU, Cases&Cooling Mod PC Gaming Mod Elite Member
Super Moderator
Sep 28, 2005
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isthat the correct. formula in buying a ram?

no that makes no sense as each core can be considered 1 thread on the CPU ur looking at.

So in short ur just doubling your number....
Or if ur on an intel... each core can be 2 threads if it supports HT, so then by that forumula it would mean Intel requires more RAM just because.. :biggrin:


But general rule of thumb... normal everyday surfing.... no gaming... 4GB is more then enough.

Gaming... 8GB is the sweet spot.

VM Ware... whats the max your board can support?

^^ This. Core amount to memory is irrelevant.

that isnt quite true...
If we are building a VM BOX... u do need a core / ram ratio for virtual machines...
 

metril

Member
Oct 29, 2011
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@OP

If you have to read a book to learn how to build a PC, then building a PC probably isn't for you.
 

Enigmoid

Platinum Member
Sep 27, 2012
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This is a pretty bad rule. But some apps (such as adobe) can be sensitive to the cores/threads to RAM ratio for certain things.
 

Puppies04

Diamond Member
Apr 25, 2011
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@OP

If you have to read a book to learn how to build a PC, then building a PC probably isn't for you.

Some of us didn't come out of the womb with the relevant knowledge. You are obviously very special.
 

Headfoot

Diamond Member
Feb 28, 2008
4,444
641
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@OP

If you have to read a book to learn how to build a PC, then building a PC probably isn't for you.

gtfo




That's not an appropriate response for the tech forums or as an answer for that post.

Profanity is not allowed in the tech side of the forums.

Neither the acronym GTFO, or "get the **** out" is allowed here.


esuqared
Anandtech Forum Director

==========

@OP: For gaming these days I'd say 8 GB is the sweet spot. If you do video editing, photo editing, 16GB would make sure you never run out of RAM for the foreseeable future. 8GB would probably still cut it for most people. If you are doing virtual machines, VMWare etc, then go for as much as you can get in your motherboard
 
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metril

Member
Oct 29, 2011
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@Puppies04 and Headfoot

Ever heard of Google? Ever heard of any of the computer websites out on the internet? Books become outdated extremely fast unless their are on a very special topic and even then, it is only inevitable that they become obsolete. The question that the OP asks makes me think that the OP is a bit too trusting in that "book". And perhaps the OP is not ready to build a computer at this time, but will be in the future after more research and understanding.

I should have expanded in my previous post. The point wasn't to berate the OP.
 

Aikouka

Lifer
Nov 27, 2001
30,383
912
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Back with my Sandy Bridge i5's original build, I went with 8GB, but since then, I've switched to using 16GB for my builds. I've actually hit around 90% memory used in an 8GB setup (Firefox is a RAM monger), so I'd rather avoid such silliness in the future. :$
 

Puppies04

Diamond Member
Apr 25, 2011
5,909
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@Puppies04 and Headfoot

Ever heard of Google? Ever heard of any of the computer websites out on the internet? Books become outdated extremely fast unless their are on a very special topic and even then, it is only inevitable that they become obsolete. The question that the OP asks makes me think that the OP is a bit too trusting in that "book". And perhaps the OP is not ready to build a computer at this time, but will be in the future after more research and understanding.

I should have expanded in my previous post. The point wasn't to berate the OP.

Sorry but I have to disagree with you there.


I have a book that is at least 10 years old if not more. Short of a few connections that have changed i.e IDE to SATA you could get everything you need to know about building a PC today from it. The basic premise of the PC hasn't changed since it was created.