DDR5 - why are 24 GB DIMMs C46 vs 16GB C30?

It's just because it's only the crucial pro stuff that has been stocked here so far.
Looking elsewhere there is stuff from corsair and team group in 6400c32 and 7200c36 available, which I assume ocuk will get in before long.

As for performance I'd imagine quite a bit of difference, although less so on x3D chips
 
WARburton said:
This would be my thoughts.
Is there an advantage to 24gb over 32gb dim???

If it’s cheaper I’d go 48 over 64 for just gaming.. lol
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48 gig kits overclock easier than 32gig. Not better per se.

It’s complicated and I can’t recall the exact reason but because DDR5 is designed, 2 by 24gig kits put less pressure on the memory controller of the CPU.

Source: Buildzoid said so
 
JollyJamma said:
48 gig kits overclock easier than 32gig. Not better per se.

It’s complicated and I can’t recall the exact reason but because DDR5 is designed, 2 by 24gig kits put less pressure on the memory controller of the CPU.

Source: Buildzoid said so
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Afaik, 24GB (24x2) is always single rank, but 32GB (32x2) is always dual rank, so I think that's why there, but in terms of 16GB versus 24GB modules, I don't know if there's a difference there.
 
Tetras said:
Afaik, 24GB (24x2) is always single rank, but 32GB (32x2) is always dual rank, so I think that's why there, but in terms of 16GB versus 24GB modules, I don't know if there's a difference there.
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Apparently, 16gig modules are still harder to OC when compared to 2 by 24gig kits.

I’ll try evidence it with a video of his but he does ramble.
 
JollyJamma said:
I think the information is in this video but it’s been a hot minute since I listened to it and there are more than a few DDR5 overclocking videos and they are all very long and packed with information
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I did a search and one comment he made was that there is more variance with 16GB sticks, whereas 24GB sticks clock more consistently high.
 
I'M not sure if in a year or so 32gb will be enough, as I often have 29gb in use gaming with a couple of tabs open, so when I upgrade soon I'll be tempted by 48gb, but the price :eek:
 
WARburton said:
What games do you play to be useing 29gb of ram..

And when you say a few tabs do you mean about 20 like some people do haha
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I often have a virtual machine running whilst gaming and many many chrome tabs open so I tend to use more than 20gigs of RAM and I have run out of 32gigs of memory once or twice but even then, I’m not sure I need 32gigs.


I’ve stopped running a VM whilst gaming because I’ve noticed how it increases the latency of frame generation and makes games like PUBG unplayable.

A 48gig kit would be a nice to have to play around with but not good value for money and the price will definitely decrease in the next couple years.
 
WARburton said:
What games do you play to be useing 29gb of ram..

And when you say a few tabs do you mean about 20 like some people do haha
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When I posted that I had Diablo running at max settings 4k, 9 firefox tabs and 1 Opera Gx window open streaming a news programme (also there is of course all the usual background apps running likes afterburner, hwinfo, steam, epic etc, etc). This is quite usual for me because I'm always switching windows and looking at web pages (short attention span). I just replicated it and had same ram usage. However when I closed the browser windows and just had Diablo running I had 19gb in use.

Incidentally, I just looked at prices and some 6000mhz/6400mhz 64gb ram can be had for only about £15-20 more than 48gb, so 2x32 sticks is much cheaper per gb than 2x24 sticks, probably for the reasons mentioned by @JollyJamma. 64gb does seem like overkill though as unused ram is wasted ram.
 
The best memory chips are.
Hynix 16Gb A-die: Speeds of 8000Mbps and higher are possible if your CPU/mobo are good enough. Similar timings to 16Gb M-die

Hynix 16Gb M-die: Tends to max out between 7200 and 7600Mbps similar timings to 16Gb A-die

Hynix 24Gb M-die: Even higher clocking than 16Gb A-die. Slightly looser timings

2x16GB ===============================================

Warning if you see a memory kit with a spec like: 6400 36-46-46-100 @ 1.4V it's almost certainly using cut down 24Gb Micron ICs which don't OC very well so don't buy it unless it's really cheap. Corsair seems to have a lot of these high speed loose Micron kits.

TEAMGROUP T-Create Classic 32 GB (2 x 16 GB) DDR5-5600 CL46 Memory (CTCCD532G5600HC46DC01) - ************
//should always be Hynix 16Gb A-die. Manually tuning this is way more cost effective than buying high speed (7200+) XMP kits and hoping that they work. Great for both AMD and intel. The stock performance kinda sucks because it's just JEDEC spec.

Kingston FURY Beast 32 GB (2 x 16 GB) DDR5-6000 CL40 Memory (RFBB5-60C40K2/32) - ************
//should be Hynix most of the time but can also be Samsung.

G.Skill Ripjaws S5 32 GB (2 x 16 GB) DDR5-6000 CL30 Memory (F5-6000J3040F16GX2-RS5K) - ************
//Great for Ryzen if you just want to turn on EXPO/XMP(AM5 boards are able to read XMP)

G.Skill Flare X5 32 GB (2 x 16 GB) DDR5-6000 CL32 Memory (F5-6000J3238F16GX2-FX5) - ************
//Great for Ryzen if you just want to turn on EXPO/XMP(AM5 boards are able to read XMP)

PROXMEM KERBEROS 32 GB (2 x 16 GB) DDR5-6400 CL38 Memory (PGD5U64A38XX7-K0WC) - ************
// Another Hynix based option. Will need an underclock on Ryzen.

OLOy Blade RGB 32 GB (2 x 16 GB) DDR5-6000 CL32 Memory (ND5U1660320BRKDE) - ************
// Another Hynix based option.

Corsair Vengeance 32 GB (2 x 16 GB) DDR5-6000 CL30 Memory (CMK32GX5M2B6000C30) - ************
// Another Hynix based option.

Patriot Venom RGB 32 GB (2 x 16 GB) DDR5-6200 CL40 Memory (PVVR532G620C40K) - ************
//should be Hynix

GeIL Polaris RGB 32 GB (2 x 16 GB) DDR5-6400 CL38 Memory (GOSG532GB6400C38ADC) - ************
// Another Hynix option

TEAMGROUP T-Force Delta RGB 32 GB (2 x 16 GB) DDR5-6800 CL34 Memory (FF4D532G6800HC34BDC01) - ************
//Highest XMP speed I'd expect to work on all 13th gen chips. A lot of 12th gen won't run it.

I don't recommend 7200 or higher rated kits because the stability is too RNG.

2x24GB ==============================================

G.Skill Ripjaws S5 48 GB (2 x 24 GB) DDR5-6000 CL40 Memory (F5-6000J4048F24GX2-RS5K) - ************
// Can be 24Gb Micron so don't expect it to overclock much but at least it's not expensive

G.Skill Trident Z5 RGB 48 GB (2 x 24 GB) DDR5-7200 CL36 Memory (F5-7200J3646F24GX2-TZ5RK) - ************
// Has to be Hynix 24Gb M-die. Great for hitting very high mem clocks on intel

2x32GB ===============================================

TEAMGROUP T-Create Classic 64 GB (2 x 32 GB) DDR5-5600 CL46 Memory (CTCCD564G5600HC46DC01) - ************
// Should always be Hynix. So a cost effective option if you overclock it.

TEAMGROUP T-Create Classic 64 GB (2 x 32 GB) DDR5-6000 CL48 Memory (CTCCD564G6000HC48DC01) - ************
// Should always be Hynix. So a cost effective option if you overclock it.

G.Skill Ripjaws S5 64 GB (2 x 32 GB) DDR5-6000 CL30 Memory (F5-6000J3040G32GX2-RS5K) - ************
// Hynix with a strong profile for both Ryzen and intel

Corsair Vengeance 64 GB (2 x 32 GB) DDR5-6600 CL32 Memory (CMK64GX5M2B6600C32) - ************
// strong XMP for intel 13th gen that shouldn't cause stability problems

2x48GB ===============================================

G.Skill Ripjaws S5 96 GB (2 x 48 GB) DDR5-5600 CL40 Memory (F5-5600J4040D48GX2-RS5K) - ************
//Should be Hynix 24Gb M-die. Might also be Micron.

G.Skill Trident Z RGB 96 GB (2 x 48 GB) DDR5-6400 CL32 Memory (F5-6400J3239F48GX2-TZ5RK) - ************
// has to be Hynix 24Gb M-die. Should be a strong overclocker. Might also work at 6000 on Ryzen.

I have 0 experience with quad rank DDR5 setups(4x32 and 4x48GB) and don't recommend them since they put way too much load on the memory controller.
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This was taken from the summary description of a video here https://www.patreon.com/posts/what-ddr5-to-buy-84547490
 
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