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far north vibe 2 月 3 日 下午 8:00
4 modules RAM
Sry for bad English with Google Translate. There are 2x8GB Kingston Fury beast ddr4, working at jedec 2400 frequency (yes, I just noticed it now). I am thinking of increasing the volume to 32GB for the future, adding 2 of the same sticks, while they are on sale. But they can come with other chips from Samsung / Hynix and someone else. Many write about the increased load on the processor controller, how critical it is in this regard to sit for years on 4 sticks and will the PC start normally at 2400 without lowering the frequency (I do not want to use XMR profiles, to avoid blue screens, stability is more important), if the chips turn out to be from different manufacturers? Single-rank memory, i5-12400f processor. Old computers were used for 15 years with a garden of sticks, it seems the controller did not destroy, but everyone strongly recommends 2x16 and nothing else. Has anyone had a similar experience? Staying on 16gb in a couple of years won't work, and buying a 32gb kit in this case is overprice.
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引用自 Illusion of Progress:
The increased load on the system is real. That's just physics. Whether this increased load prevents you from stabilizing it and thus booting at your desired target point, or at all, is a different matter.

There's a list of variables that impact how "heavy" or "hard" a memory configuration is to stabilize. The following things...

1. DIMM count

2. Rank count (individual consumer DIMMs are typically single rank or dual rank)

3. Frequency and timings

4. Motherboard and its BIOS.

...All make it harder as they increase (for timings, it would be as it decreases). So often, if it fails to stabilize, you can "lighten the load" by doing things such as decreasing DIMM count, using DIMMs that are single rank instead of dual rank, lowering frequency or loosening timings, etc. to try and get it stable. You may also be able to manually tune some things as opposed to relying on profiles like XMP, EXPO, DOCP, etc. if you're mixing different kits.

On top of those, DDR5 is also a bit harder to stabilize, and this especially shows with four DIMMs.

With DDR4, and a target speed of just 2,400 MHz you should be fine. DDR4 starts getting really hard around four DIMMs of dual rank at something like 3,200 MHz to 3,600 MHz. Some motherboards/CPU IMCs won't even get that far, and some may go a bit higher. With two DIMMs, you'll get to 4,000 MHz+ on some systems.

As for the recommendation with 2x 16 GB, that's more of "ideal option from a starting place of nothing", and probably pertains more to DDR5 (reason being, less than 32 GB on DDR5 means either single channel, or awkward 8 GB DIMMs which both result in less performance). If you already have 16 GB though, adding another 16 GB is an option. Whether you want to accept that, or pay more to avoid it, is your call. Since you're barely above JEDEC default right now, any possible loss wouldn't be much (dropping to 2,133 MHz from 2,400 MHz) so I'd say it's fine. Realistically, I'd probably buy a new set of 2x 16 GB DDR4 at like 3,200 MHz and use the profile speeds though. You're leaving a lot of performance on the table with a 12th generation CPU by running DDR4 at JEDEC speeds...
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正在显示第 1 - 15 条，共 15 条留言
_I_ 2 月 3 日 下午 8:33 
you can try, but most likely you will need to lower the ram freq to something that is stable

if they have the same xmp profiles, you can enable xmp, then lower the freq so all the timings and voltage are set to its profile

on most boards if you change or add ram it will reset to default ram speeds/timings
最后由 _I_ 编辑于; 2 月 3 日 下午 8:34
#1
far north vibe 2 月 4 日 上午 3:00 
In xmp profiles ram freq 3000-3200, defolt for 2 sticks was 2400. 4 sticks will start with 2400 or lower? And what with controller load?
#2
BurakZG 2 月 4 日 上午 3:06 
it depends more on your processor than on RAM sticks
if your CPU can handle 4 sticks on 2400, it will work (i'm pretty sure, it will)
just make sure, that you buy RAM sticks that are "a bit faster" than what CPU can handle

i always advice to run Memtest86 after changing RAM configuration
it takes long time, but it will give you peace of mind for much longer (and no random crashes)
最后由 BurakZG 编辑于; 2 月 4 日 上午 3:09
#3
_I_ 2 月 4 日 上午 3:10 
the cpu has the memory controller in it

when you swap dimms, it should default back to 2400
just enable xmp again, if its unstable, and lower the freq til it is stable

use mtest86 usb bootable image
https://www.memtest86.com/download.htm
#4
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Illusion of Progress 2 月 4 日 上午 11:27 
The increased load on the system is real. That's just physics. Whether this increased load prevents you from stabilizing it and thus booting at your desired target point, or at all, is a different matter.

There's a list of variables that impact how "heavy" or "hard" a memory configuration is to stabilize. The following things...

1. DIMM count

2. Rank count (individual consumer DIMMs are typically single rank or dual rank)

3. Frequency and timings

4. Motherboard and its BIOS.

...All make it harder as they increase (for timings, it would be as it decreases). So often, if it fails to stabilize, you can "lighten the load" by doing things such as decreasing DIMM count, using DIMMs that are single rank instead of dual rank, lowering frequency or loosening timings, etc. to try and get it stable. You may also be able to manually tune some things as opposed to relying on profiles like XMP, EXPO, DOCP, etc. if you're mixing different kits.

On top of those, DDR5 is also a bit harder to stabilize, and this especially shows with four DIMMs.

With DDR4, and a target speed of just 2,400 MHz you should be fine. DDR4 starts getting really hard around four DIMMs of dual rank at something like 3,200 MHz to 3,600 MHz. Some motherboards/CPU IMCs won't even get that far, and some may go a bit higher. With two DIMMs, you'll get to 4,000 MHz+ on some systems.

As for the recommendation with 2x 16 GB, that's more of "ideal option from a starting place of nothing", and probably pertains more to DDR5 (reason being, less than 32 GB on DDR5 means either single channel, or awkward 8 GB DIMMs which both result in less performance). If you already have 16 GB though, adding another 16 GB is an option. Whether you want to accept that, or pay more to avoid it, is your call. Since you're barely above JEDEC default right now, any possible loss wouldn't be much (dropping to 2,133 MHz from 2,400 MHz) so I'd say it's fine. Realistically, I'd probably buy a new set of 2x 16 GB DDR4 at like 3,200 MHz and use the profile speeds though. You're leaving a lot of performance on the table with a 12th generation CPU by running DDR4 at JEDEC speeds...
#5
far north vibe 2 月 4 日 下午 10:58 
Many thanks for detailed answer. I'll try to add 2 same modules and hope they start normal.
#6
Kitsune 🌸 10 月 26 日 上午 5:27 
Same situation here, everything went ok? I5-12400 can handle 4x8 at 3200mhz?


B660M AORUS PRO DDR4
I5-12400F
2x8GB - Running at 3200mhz (XMP Profile 1)
最后由 Kitsune 🌸 编辑于; 10 月 26 日 上午 5:32
#7
wing0zero 23 小时以前 
引用自 Kitsune 🌸：
Same situation here, everything went ok? I5-12400 can handle 4x8 at 3200mhz?


B660M AORUS PRO DDR4
I5-12400F
2x8GB - Running at 3200mhz (XMP Profile 1)
2x16GB will always be the better option if you can.
#8
Illusion of Progress 23 小时以前 
Late AM4 era platforms are a bit better at four DIMMs because the common target speeds for them (3,200 MHz and 3,600 MHz) aren't as bad to reach.

In addition, 8 GB DIMMs in DDR4 would have been single rank for quite a while now, which should further increase your chances.

Getting two kits to operate together though (whether they are the same or not) always adds further considerations here. Some timings need to be looser with 4 DIMMs than with 2 and motherboards won't always get that part right.

Given the variables (3200 MHz on late AM4 era with likely single rank DIMMs), I think you should be able to do it, but as always this is never a guarantee. So you may have to attempt manually setting some timings/frequencies/voltages. But even if you concede on your target a bit, it should at least work (barring any RAM actually being bad).
引用自 wing0zero：
2x16GB will always be the better option if you can.
Yes, but most people asking this question are looking to upgrade an existing platform, meaning they already have RAM and are looking to add as opposed to replace.

RAM in general (first DDR4, but now DDR5 too) has been getting more expensive recently too.
#9
wing0zero 23 小时以前 
引用自 Illusion of Progress：
Yes, but most people asking this question are looking to upgrade an existing platform, meaning they already have RAM and are looking to add as opposed to replace.

RAM in general (first DDR4, but now DDR5 too) has been getting more expensive recently too.
Hence if you can, I would sell the 2x8GB if possible and buy 2x16GB.

Because most asking don't want this

引用自 Illusion of Progress：
but as always this is never a guarantee. So you may have to attempt manually setting some timings/frequencies/voltages.
#10
Illusion of Progress 23 小时以前 
I'm aware of that, and I'm not disagreeing it would be the ideal move to get your target capacity in less DIMMs if possible. I was just explaining why people ask/seek out doing it. The answer is always cost.

Selling things takes time and effort that sometimes puts people off from even doing it.
最后由 Illusion of Progress 编辑于; 23 小时以前
#11
Kitsune 🌸 23 小时以前 
引用自 wing0zero：
2x16GB will always be the better option if you can.


Unfortanely i'm in a situation that i already have 2x8 and buying 2x16 is less cheaper than another 2x8. Personaly, i dont like the idea of selling something first and then upgrade, i prefer when i already dont use anymore

That's why i want to know if I5-12400 can handle 4 sticks of ram with XMP 3200mhz

Some people say it doesnt:
https://www.reddit.com/r/overclocking/comments/141j6xy/4_sticks_of_ram_in_asus_tuf_b660mplus_d4_with/
最后由 Kitsune 🌸 编辑于; 22 小时以前
#12
wing0zero 22 小时以前 
引用自 Kitsune 🌸：
引用自 wing0zero：
2x16GB will always be the better option if you can.


Unfortanely i'm in a situation that i already have 2x8 and buying 2x16 is less cheaper than another 2x8. That's why i want to know if 12400 can handle 4 sticks of ram, because i saw some posts that say it doesnt.
Like this one:
https://www.reddit.com/r/overclocking/comments/141j6xy/4_sticks_of_ram_in_asus_tuf_b660mplus_d4_with/
Just a gamble, it probably will work but with some messing in BIOS like said from Illusion, worst case you have to do almost stock clocks, best case you drop from 3200MHz to 3000MHz with auto timings probably.
最后由 wing0zero 编辑于; 22 小时以前
#13
Kitsune 🌸 22 小时以前 
引用自 Illusion of Progress：
Late AM4 era platforms are a bit better at four DIMMs because the common target speeds for them (3,200 MHz and 3,600 MHz) aren't as bad to reach.

In addition, 8 GB DIMMs in DDR4 would have been single rank for quite a while now, which should further increase your chances.

Getting two kits to operate together though (whether they are the same or not) always adds further considerations here. Some timings need to be looser with 4 DIMMs than with 2 and motherboards won't always get that part right.

Given the variables (3200 MHz on late AM4 era with likely single rank DIMMs), I think you should be able to do it, but as always this is never a guarantee. So you may have to attempt manually setting some timings/frequencies/voltages. But even if you concede on your target a bit, it should at least work (barring any RAM actually being bad).

引用自 wing0zero：


Just a gamble, it probably will work but with some messing in BIOS like said from Illusion, worst case you have to do almost stock clocks, best case you drop from 3200MHz to 3000MHz with auto timings probably.


Tysm, ill try and come back here later to say if everything went ok!


Btw all my 4 sticks are Kingston Fury Beast (KF432C16BB/8). Which is approved with XMP and 4 sticks on B660M AORUS PRO website: https://www.gigabyte.com/br/Motherboard/B660M-AORUS-PRO-DDR4-rev-10/support#support-memsup
最后由 Kitsune 🌸 编辑于; 22 小时以前
#14
_I_ 21 小时以前 
intel ark for the 12400f shows ddr4 3200 (1600mhz), it will work at that speed with 4 dimms
https://www.intel.com/content/www/us/en/products/sku/134587/intel-core-i512400f-processor-18m-cache-up-to-4-40-ghz/specifications.html

assuming the op has ddr4 2400 (1200mhz) kit, adding pretty much any kit would be faster and be limited by the slower kit

a faster 2x16g kit (~85$) would be ideal, but adding a 2x8g kit (~40$) would be cheaper and still work if the op just needs more ram, not really caring about its speed
#15
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