Memory compatibility FW 13 AMD Ryzen™ 7040U series DDR5-SODIMM-5600MT/s

Framework Laptop 13
82

I have the kit version with two SO-DIMMs (CT2K16G56C46S5) and they work fine, at 5600MT. These are pretty basic JEDEC spec parts, so one would expect them to just work. I bought mine directly from Crucial page.

As for the performance difference against CL40 parts like the Kingston, I imagine some latency sensitive apps (mostly games) might see some difference, but I highly doubt most productivity apps will care. iGPU tends to care more about bandwidth than latency, but again, there will always be outliers.

I personally don’t care that much, and Crucial kit was… “priced right.” :slight_smile:

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83

With how awesome Framework is and how much work they’ve been putting into testing new BIOS updates, I feel it’s only a matter of time until this is possible.

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84

One can always hope…

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85

I can confirm that Crucial CT16G56C46S5 works perfectly on my R5 DIY.

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86

Thanks for sharing this. Helps us figure out what we want to do.
Can you show us what speed it is running at using something like CPU-Z?

87

It’s running at the rated 5600 Mhz.
Here’s the output from dmidecode:

dmidecode output 
Handle 0x0013, DMI type 17, 92 bytes
Memory Device
	Array Handle: 0x0011
	Error Information Handle: 0x0016
	Total Width: 64 bits
	Data Width: 64 bits
	Size: 16 GB
	Form Factor: SODIMM
	Set: None
	Locator: DIMM 0
	Bank Locator: P0 CHANNEL B
	Type: DDR5
	Type Detail: Synchronous Unbuffered (Unregistered)
	Speed: 5600 MT/s
	Manufacturer: Unknown
	Serial Number: E770FD24
	Asset Tag: Not Specified
	Part Number: CT16G56C46S5.M8G1   
	Rank: 1
	Configured Memory Speed: 5600 MT/s
	Minimum Voltage: 1.1 V
	Maximum Voltage: 1.1 V
	Configured Voltage: 1.1 V
	Memory Technology: DRAM
	Memory Operating Mode Capability: Volatile memory
	Firmware Version: Unknown
	Module Manufacturer ID: Bank 6, Hex 0x9B
	Module Product ID: Unknown
	Memory Subsystem Controller Manufacturer ID: Unknown
	Memory Subsystem Controller Product ID: Unknown
	Non-Volatile Size: None
	Volatile Size: 16 GB
	Cache Size: None
	Logical Size: None
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88

All,
I got my Ryzen 7840U DIY unit last week and had my other components lying around for a bit:

  • WD SN850X 2TB
  • 2x32GB Kingston Fury Impact (KF556S40IBK2-64) → SK Hynix dies
  • Windows 11 Pro

I can confirm that the RAM runs at 5600MT/s and CL40! This kit seems to be one of the fastest available. Highly recommended, especially this capacity. That should keep the laptop running for quite a bit.

Happy building!

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89

Thank you very much for the upload. After reviewing the information on the two CL40 kits available, the following screenshots from the reddit thread caused some confusion for me:

618×625 48 KB

621×615 64.8 KB

Does that mean, the G.Skill kit only runs at CL40 with XMP enabled and with JEDEC only at CL42 at best? Even though this info apparently comes from a Framework Laptop 13 user…

In order to clarify this, I’d be very much obliged :pray:, if you or somebody else would kindly upload the corresponding SPD screenshot for the Kingston Kit.

90

Here you go:

spd
spd606×603 158 KB

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91

Do we know what are the timings of the Framework RAM? What performance boost would CL40 make?

I am definitely considering the 2x32GB Kingston Fury Impact (KF556S40IBK2-64). Is it a no brainer if I can get it for 100€ less than the Framework RAM?

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92

IIRC the Framework ram has timings of 46-45-45.

That calculates to a CAS latency of 16.4 ns.

CL40 ram has a CAS latency of 14.3 ns.

It is a meaningful improvement, but not huge.

For 100€ less I would consider it a no brainier as it offers better performance at a lower price.

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94

Any thoughts on which to go for between the kingston fury impact kf556s40ibk2-64 and the Crucial 64GB Kit DDR5-5600 CL46 (CT2K32G56C46S5)

At the moment the Kingston is about 30€ cheaper than the Crucial…

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95

Dont know how to quote yet but these are also my 2 favorite @Matthew_Damarell. Contradicting info in rewies though, mostly claiming the Kingston doesn’t run on the full 5600 but only 4800 Mhz?

XMP yes / no /doesnt apply / Jeddec / cls 46 40

Confused beginner here :see_no_evil::woozy_face:

96

In addition to being cheaper, the Kingston kit is also faster. I would go for that.

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97

Highlight the text and a quote button will appear.

The previous generation of processors from both Intel and AMD only officially supported 4800 MT/s ram.

If you install 5600 MT/s ram into a laptop with a processor that only officially supports 4800 MT/s then the ram will be automatically slowed down to 4800 MT/s by default.

I strongly suspect that the reviews you’re seeing are from people with laptops with previous gen processors. Users have reported that on the AMD Framework 13 the Kingston 5600 MT/s modules run at the full rated 5600 MT/s.

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98

Thank you :blush:

Ok. Thanks so much for your help

99

But wait, there’s more (another contender)

What about the G. Skill Ripjaw.?
They had an unbeatable price around 175,-
Seems they have even higher cls?

F5-5600S4645A32GX2-RS

100

That kit has equivalent specs to Framework’s official ram.

G.Skill also produces another kit (model number F5-5600S4040A32GX2-RS for the 2x 32 GB variant), which is the only kit with as good specs as the Kingston kit afaik.

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101

Oh no, now I’m getting even more confused :thinking:

The only difference in those 2 I can spot is that the latter has less Cac latency (CL 40-40-40) but then supports dual-channel and is more expensive?
The one I’ve found started Cac latency with(CL 46-45-45) but doesn’t state dual-channel support but Intel XMP.

As per framework description XMP is not supported anyway but then only applies to Intel or did I get that wrong :flushed:

102

All ram supports dual channel. You just need 2 sticks of it and a CPU/motherboard that supports dual channel.

A lot of ram has both a default/JEDEC speed (which is a super stable and low power speed that the ram supports) and an XMP/EXPO speed (which is sometimes a much faster speed that may sacrifice stability or battery life).

When Framework says they don’t support XMP/EXPO they mean that ram with XMP/EXPO should only operate at its default/JEDEC speed when used in a Framework laptop.

Some DDR5 modules (including the ones you’re looking at) support XMP/EXPO but have an XMP/EXPO speed that is identical to its default/JEDEC speed. So the ram running at its default/JEDEC speed is fine.

The reason the ram has this is because previous generation CPUs didn’t support fast default/JEDEC speeds. So if you got 5600 MT/s ram but put it in a laptop with a previous generation CPU then it would only run at 4800 MT/s, however if you then went into the laptop settings you could enable XMP/EXPO (assuming the laptop supports those) to unlock the full speed.

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