I have 96GB in my Macbook and X-Plane will easily eat up 80GB of that if you let it (complex scenery etc).. I'm not surprised considering the detail MFS 2024 is doing for the ground that it needs more

32GB it is then, unless you want to do some photo editing at the same time during your in real time cross Atlantic flight whilst simultaneously being served unlimited alcohol from the Mrs in a plastic glass to maintain full emersion.

This thread got me researching, and memory timings are likely just as important, if not more important, than moving from 32GB to 64GB. I have an early DDR5 system, and DDR5 memory was scarce at the time. All I could find was DDR5-4800 memory with CL40 timings. Now that DDR5 is mature, I can upgrade to DDR5-5600 CL28 or DDR5-6000 CL30. The slower frequency memory with the tighter timings seems to be faster in most benchmarks by a few FPS. But more importantly, both are significantly faster than the old CL40 memory currently in my machine. In the video below, the quicker memory is getting around a 30FPS boost in the games they tested (unfortunately MSFS was not one of those games).

https://youtu.be/MOatIQuQo3s?si=FKnAS6NzmFgUAzMF

Again, not sure how this will translate to MSFS... gains will probably be minimal since it's CPU limited. But the video convinced me to upgrade just to be able to take advantage of the quicker timings.

38 minutes ago, Funky D said:

This thread got me researching, and memory timings are likely just as important, if not more important, than moving from 32GB to 64GB

I think that's a great point, which is why 4 sticks is not ideal - at least not on the AM5 platform. Not sure about Intel though as I'm not up to date on that. 

But things have improved significantly on the DDR5 front in the last few years with great XMP/EXPO profiles. I'm thinking that 6000MHz CL30 should be "good enough". That's what I've got, but I improved the timings a little bit and overclocked to 6200 with 32-38-38-30.

EDIT: Actually, I'm not sure if I've improved timings - EXPO is 32-38-38-96. Memory timings ain't my biggest strength... I followed the guide below

 

Edited September 25, 20241 yr by Cpt_Piett

2 hours ago, tonywob said:

I have 96GB in my Macbook and X-Plane will easily eat up 80GB of that if you let it (complex scenery etc).. I'm not surprised considering the detail MFS 2024 is doing for the ground that it needs more

Was it memory allocation or memory usage? Google chrome will “eat” up 90GB of ram if I let it too.
 

It’s how programs work unless it’s in something like a JVM, it will allocate itself as much ram as available then depending on priority the windows memory manager we reallocate the memory based on usage

3 minutes ago, Lucky38i said:

Google chrome will “eat” up 90GB of ram if I let it too.

I.e. 90GB allocated to chrome vs used? I hope 🙂

39 minutes ago, Cpt_Piett said:

I think that's a great point, which is why 4 sticks is not ideal - at least not on the AM5 platform. Not sure about Intel though as I'm not up to date on that. 

But things have improved significantly on the DDR5 front in the last few years with great XMP/EXPO profiles. I'm thinking that 6000MHz CL30 should be "good enough". That's what I've got, but I improved the timings a little bit and overclocked to 6200 with 32-38-38-30.

Intel is the same, at least with my older 12th gen system. Guaranteed speeds are lower with 4 modules, so it will likely take some extra tweaking and may not work at all at the advertised memory speeds if 4 sticks are used instead of 2.

I opted for 5600MHz CL28 memory, which should perform about the same as 6000MHz CL30 memory at slightly lower voltages. That is something else to consider with 4 sticks: more sticks, more power, more heat. 6000MHz CL30 does seem to be the most popular, especially with AMD systems.

I'll post some crude MSFS benchmarks comparing my old 32GB DDR5-4800 CL40 with the new 64GB DDR5-5600 CL28 when I do the upgrade. I'm not expecting much, but I'm guessing I'll gain at least a few FPS. Fingers crossed!

1 hour ago, Cpt_Piett said:

I.e. 90GB allocated to chrome vs used? I hope 🙂

Yeah allocated, that’s exactly the point I’m making haha

6 hours ago, Cpt_Piett said:

I think that's a great point, which is why 4 sticks is not ideal - at least not on the AM5 platform. Not sure about Intel though as I'm not up to date on that. 

But things have improved significantly on the DDR5 front in the last few years with great XMP/EXPO profiles. I'm thinking that 6000MHz CL30 should be "good enough". That's what I've got, but I improved the timings a little bit and overclocked to 6200 with 32-38-38-30.

EDIT: Actually, I'm not sure if I've improved timings - EXPO is 32-38-38-96. Memory timings ain't my biggest strength... I followed the guide below

Make sure your FCLK and UCLK are 1:1, i.e divisible by your memory speed or you're essentially just making your setup slower / higher latency by only overclocking the speed of your RAM. Just in general with the X3Ds, once you move past 6000MT/s, you might actually see a drop-off in performance as 6000 in a 1:1 setup is probably the absolute sweet spot of the X3Ds. You are much better off getting optimized timings at 6000MT/s, with FCLK at 2000 / UCLK 3000.

Edited September 26, 20241 yr by Sethos

ive given up on EXPO on AM 5 , never been able able to get my system stable with it , after 2 motherboards and x3 sets of ram still no stable expo. think its my 7800x3d thats the problem  because i cant even reach -30 with curve optimizer 

Edited September 26, 20241 yr by sonny147

26 minutes ago, sonny147 said:

ive given up on EXPO on AM 5 , never been able able to get my system stable with it , after 2 motherboards and x3 sets of ram still no stable expo. think its my 7800x3d thats the problem  because i cant even reach -30 with curve optimizer 

Probaly a weak CPU with bad Memcontroller, 

35 minutes ago, westman said:

Probaly a weak CPU with bad Memcontroller, 

thats what iam thinking 

1 hour ago, sonny147 said:

ive given up on EXPO on AM 5 , never been able able to get my system stable with it , after 2 motherboards and x3 sets of ram still no stable expo. think its my 7800x3d thats the problem  because i cant even reach -30 with curve optimizer 

I mean, not being able to hit -30 all-cores is that not uncommon, that's a very high negative offset for the 7800X3D. Mine can't do that either. I can do -30 on 6 cores, -20 on one and -15 on another. Usually it's just individual weaker cores holding you back. I think quite a number of people have just slapped on an all-core -30 and it seems stable because that's the sort-of "default advice" you read on the internet without doing a proper full stability stress test, but it's in fact not as one or two of their cores might not handle it very well. CPU / Windows won't crash but just spit out erroneous data instead. So if it's a core that doesn't see a lot of activity, it might sit there with an unstable offset for years.

But surprising that you aren't able to do EXPO. If I were you, I'd manually set it all up, copy the EXPO values and just change them slowly. First the speed, then lower the secondary and tertiary timings.

17 minutes ago, Sethos said:

I mean, not being able to hit -30 all-cores is that not uncommon, that's a very high negative offset for the 7800X3D. Mine can't do that either. I can do -30 on 6 cores, -20 on one and -15 on another. Usually it's just individual weaker cores holding you back. I think quite a number of people have just slapped on an all-core -30 and it seems stable because that's the sort-of "default advice" you read on the internet without doing a proper full stability stress test, but it's in fact not as one or two of their cores might not handle it very well. CPU / Windows won't crash but just spit out erroneous data instead. So if it's a core that doesn't see a lot of activity, it might sit there with an unstable offset for years.

But surprising that you aren't able to do EXPO. If I were you, I'd manually set it all up, copy the EXPO values and just change them slowly. First the speed, then lower the secondary and tertiary timings.

thanks i did that yesterday it was kind of fine but then a restart later in the day and again no post just 00 on led readout. had to do a hard reset on the pc case to get it to boot 

14 minutes ago, sonny147 said:

thanks i did that yesterday it was kind of fine but then a restart later in the day and again no post just 00 on led readout. had to do a hard reset on the pc case to get it to boot 

witch bios , iam on 2204 that is the best until now for mem combability and mem OC