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Booji

macrumors 6502a
Original poster
Nov 17, 2011
793
519
Tokyo
Check some of the older threads with the lifespan of modern SSDs and the number read/write cycles. Bottom line you can beat up on an 8GB machine for over 5 years (all 365 days) and still be short of the degradation period for a modern SSD.
Not to mention the SSD technology has advanced a lot. I really don't think this is going to be an issue
 
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ajaan

macrumors regular
Dec 15, 2013
139
69
This week I've kept two user accounts open on the 8 GB Air, one for work, one for personal. No closing down of apps after I've finished or at night, and no logging out, or restarts.

Using Brave with multiple windows and about 30 odd tabs (not optimised for M1), Safari about ten or so tabs, Outlook, Teams, Skype, Zoom, Word, Pages, Multiple Excel workbooks with multiple sheets, loads of PDFs, bibliographic database, Netflix, ESPN Player, Dropbox, Calendar, Notes. Plus building genomic variant effects on ENSEMBL. External Monitor attached, not in clamshell, using both screens.

Even with everything I've got to throw at it via two user accounts, not bothering to close any apps, it hasn't missed a beat, and memory pressure been green all the time, and the Air is cool to touch (wasn't for the first few days, but now it's calmed down).

My new approach to buying now is just to buy the base model every years on university discount, and sell my current one, meaning my in use machine will be the latest and fast at a reasonable price. Eventually Apple will upgrade the RAM on base and may even go to something funky like 10 / 12 like they have random RAM amounts on the iPad.
 

m1maverick

macrumors 65816
Nov 22, 2020
1,368
1,267
Hi, sorry I don't mean to be rude....google "Intel vs ARM Architecture...include memory management as well if you want"

also, google "swap vs pagging"
I am well versed in the differences between Intel and ARM architectures as well as the difference between swap and paging. If you're unwilling to provide the requested information then I will conclude your statements on this subject are baseless.
 
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m1maverick

macrumors 65816
Nov 22, 2020
1,368
1,267
Not happening sadly. The RAM is soldiered onto the board. It's not replacable nor upgradable.
As I understand it RAM is not soldered onto the board, it's a part of the M1 processor die itself. A distinction with the same end result (i.e. non-upgradable memory) but it's one of the design characteristics of the M1 processor which helps it perform better.
 

m1maverick

macrumors 65816
Nov 22, 2020
1,368
1,267
Not to mention the SSD technology has advanced a lot. I really don't think this is going to be an issue
SSDs are not a substitute for RAM. While they have been helpful in decreasing the performance impact of paging SSDs still aren't as fast as RAM. My M1 Mini achieves 2.1GB/sec read, 2.5GB/sec write bandwidth (BlackMagic) and I believe the M1 processor has a memory bandwidth of approximately 60GB/sec.

In short: Don't use paging to a fast SSD as a replacement for RAM. If your workload requires 16GB of RAM get a system with at least 16GB of RAM.
 

pshufd

macrumors G4
Oct 24, 2013
10,151
14,574
New Hampshire
SSDs are not a substitute for RAM. While they have been helpful in decreasing the performance impact of paging SSDs still aren't as fast as RAM. My M1 Mini achieves 2.1GB/sec read, 2.5GB/sec write bandwidth (BlackMagic) and I believe the M1 processor has a memory bandwidth of approximately 60GB/sec.

In short: Don't use paging to a fast SSD as a replacement for RAM. If your workload requires 16GB of RAM get a system with at least 16GB of RAM.

I went looking for RAMDisks and couldn't find any. The best I found was SSDs with a lot of cache.
 

aleni

macrumors 68030
Jun 2, 2006
2,583
910
no need to continue on this endless debate. Just download cool ram and it’ll gives some ram for your machine. ?
 
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displayator

macrumors member
Jul 20, 2011
58
45
Geneva
As I understand it RAM is not soldered onto the board, it's a part of the M1 processor die itself. A distinction with the same end result (i.e. non-upgradable memory) but it's one of the design characteristics of the M1 processor which helps it perform better.
It's actually in between. The ram is on the "package". On most CPU model, the package only has the pins or contacts that connect the CPU to the rest of the computer. On the M1 it also has the RAM chips soldered to the package next to the CPU die. And on the underside the pins or pads to connect to the rest of the computer.

So there must be an interconnect on the package that connects the RAM chips to the CPU die.
If the RAM was on the CPU die, they would have to make a different CPU for each ram configuration.

Also, apparently RAM transistor and CPU transistor are very different, so it would not make sense to have the RAM part of the CPU.
 

JeepGuy

macrumors 6502
Sep 24, 2008
332
110
Barrie
It's actually in between. The ram is on the "package". On most CPU model, the package only has the pins or contacts that connect the CPU to the rest of the computer. On the M1 it also has the RAM chips soldered to the package next to the CPU die. And on the underside the pins or pads to connect to the rest of the computer.

So there must be an interconnect on the package that connects the RAM chips to the CPU die.
If the RAM was on the CPU die, they would have to make a different CPU for each ram configuration.

Also, apparently RAM transistor and CPU transistor are very different, so it would not make sense to have the RAM part of the CPU.
I agree, from the pictures it looks like the ram is solder reflowed onto the die which makes sense, the other thing is that there are only 2 chips, 2x4(8) or 2x8(16), I know that Samsung just started producing 16gb chips, so there is a possibility that a 32gb Pro model will be made available in the future.
 

Ethosik

Contributor
Oct 21, 2009
8,142
7,120
Not happening sadly. The RAM is soldiered onto the board. It's not replacable nor upgradable.
Uh you missed what I was saying. Upgrade Mac mini as in get rid of it and get the rumored Mac Pro mini or at least the Mac Pro Apple Silicon version. I prefer headless systems.
 

ADGrant

macrumors 68000
Mar 26, 2018
1,689
1,059
Reading this thread makes me chuckle. Working in the technology space I know so many people that have this ingrained idea that they NEED a tonne of RAM in their computer to do basically anything. And they get emotionally defensive about it, it's like a paranoia. I assume it it is a form of PTSD that comes from decades of experience with Windows systems that gobbled RAM like candy.

I even had one co-worker that we upgraded to 16GB on Win 10 and then noted that the system never used more than 8GB or RAM during their daily routine usage.

In any case the test results on the 8GB model are extremely impressive. MacOS combined with the M1 does an incredible job of managing the resources.

In my opinion it comes down to this, unless you are currently a MBP or Mac Pro user with 32GB or more of ram in your system, you will most likely be just fine with the 8GB model. However, if the thought of that bothers you, by all means spend the extra $200 for the piece of mind that will bring you.

I'm kind of wired the opposite way, I hate buying or having something that I'm not getting use out of.

I don't like buying something I won't get use of either but for RAM and storage too much is better than not enough.
 

pshufd

macrumors G4
Oct 24, 2013
10,151
14,574
New Hampshire
I don't like buying something I won't get use of either but for RAM and storage too much is better than not enough.

I have a Late 2009 iMac that I just restored and it has 4 GB of RAM. I'm going to order 8 GB of RAM so that I can run email, browse using full performance mode, and run several other things. It can run on 4 GB of RAM but it has a HDD and paging and swapping on a HDD is likely unpleasant. I am not up to replacing the HDD with an SSD on this model as it's pretty complicated to do.
 

Pressure

macrumors 603
May 30, 2006
5,182
1,545
Denmark
I have a Late 2009 iMac that I just restored and it has 4 GB of RAM. I'm going to order 8 GB of RAM so that I can run email, browse using full performance mode, and run several other things. It can run on 4 GB of RAM but it has a HDD and paging and swapping on a HDD is likely unpleasant. I am not up to replacing the HDD with an SSD on this model as it's pretty complicated to do.
The glass panel is held on by magnets on that model.

It’s quite easy, just follow the guide on ifixit :)
 
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pshufd

macrumors G4
Oct 24, 2013
10,151
14,574
New Hampshire
The glass panel is held on by magnets on that model.

It’s quite easy, just follow the guide on ifixit :)

It's always a possibility. But I'm going to add 8 GB to get to 12 GB. If I have 12 GB, then I'll never have to page/swap.

I wanted to test out Target Display Mode and it works great. I'm typing this from my 2015 MacBook Pro to the iMac using Target Display Mode. This is a very cool feature - too bad they removed it after 2014.
 

Paul1980

macrumors regular
Nov 15, 2020
115
97
United Kingdom
Ive currently got the MBP 8gb and I'm returning it as soon as the 16GB model ships. After the initial reviews I thought 8gb would be enough but when I'm constantly running in memory swap I thought I would order the 16gb and return the 8gb when the 16gb arrives. Ive got until January 8th to return the 8gb so hopefully the 16gb delivers by then!
 
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pshufd

macrumors G4
Oct 24, 2013
10,151
14,574
New Hampshire
Ive currently got the MBP 8gb and I'm returning it as soon as the 16GB model ships. After the initial reviews I thought 8gb would be enough but when I'm constantly running in memory swap I thought I would order the 16gb and return the 8gb when the 16gb arrives. Ive got until January 8th to return the 8gb so hopefully the 16gb delivers by then!
I can see lots of models in the refurb store.
 
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Sanpete

macrumors 68040
Nov 17, 2016
3,695
1,665
Utah
If your workload requires 16GB of RAM get a system with at least 16GB of RAM.
Safe advice that everyone can agree on, including those who get 8.

There shouldn’t even have been an option, just release all M1 macs with 16gb.
Because everyone has an extra $200.

I don't like buying something I won't get use of either but for RAM and storage too much is better than not enough.
And the right amount is better than either.

Ive currently got the MBP 8gb and I'm returning it as soon as the 16GB model ships. After the initial reviews I thought 8gb would be enough but when I'm constantly running in memory swap I thought I would order the 16gb and return the 8gb when the 16gb arrives. Ive got until January 8th to return the 8gb so hopefully the 16gb delivers by then!
Is there some performance issue? Memory swap isn't in itself a problem.
 
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Paul1980

macrumors regular
Nov 15, 2020
115
97
United Kingdom
Safe advice that everyone can agree on, including those who get 8.


Because everyone has an extra $200.


And the right amount is better than either.


Is there some performance issue? Memory swap isn't in itself a problem.
Safe advice that everyone can agree on, including those who get 8.


Because everyone has an extra $200.


And the right amount is better than either.


Is there some performance issue? Memory swap isn't in itself a problem.
I’m dealing with a huge amount of lightroom classic exports of large files. I can be running in 4-5 gb of memory swap. My understanding is that RAM is quicker than SSD so the 16gb will be quicker in some of those tasks.
 

curmudgeonette

macrumors 6502a
Jan 28, 2016
586
496
California
So there must be an interconnect on the package that connects the RAM chips to the CPU die.
If the RAM was on the CPU die, they would have to make a different CPU for each ram configuration.
I agree, from the pictures it looks like the ram is solder reflowed onto the die which makes sense, the other thing is that there are only 2 chips, 2x4(8) or 2x8(16),
The M1 die is attached (flip chip, i.e. upside down) to a small circuit board. The two stacks of memory dies are also attached to this circuit board. Each stack of RAM is likely four dies for 8GB machines, and eight dies for 16GB machines.

The small M1 SOC circuit board is then soldered to the main logic board.

These days it is not uncommon to have multiple dies on a CPU's little circuit board. For example, mobile Intel CPU's have the PCH on there. Meanwhile desktop CPU's might have EDRAM cache on there.

This is in contrast to certain GPU's where there is a small circuit board, upon which is a low tech silicon die that simply provides interconnects, upon which is the GPU die and several stacks of HBM. There need to be so many connections between the GPU and HBM that they have to be really tiny - too tiny to etch on a circuit board.

BTW, stacking RAM dies is not new: Most (all?) of Apple's LPDDR3 machines used memory packages with stacked dies inside.
 
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