Expo vs manual RAM OC

[KrzysiuM]

Is there a difference beetween EXPO and manual one? For instance i had enable expo on 6000mhz cl 30 36 36 80 and change it manually withou EXPO enabled by memory try it on msi mobo to 6000mhz cl 30 36 36 76 and it seems stable. Will it be better than EXPO one or it has some other thing inside that technology that boosts ram speed and performance?

[Bad 💀 Motha]

Higher bandwidth RAM is really only good for demanding work projects, where the bandwidth can help with larger amounts of data.

However when it comes to general PC use, most everyday tasks and GAMING; Lower Latency RAM helps more.

You can't have both high bandwidth AND low latency; there is always the balancing act trade-off; this is why for DDR5, 6000 @ CL30 is a great balance.

The whole point of XMP/EXPO is to have accurate settings set by the brand maker, compiled into a tiny ROM and allows to apply via Profiles. This is the easy way to get the RAM to run as originally intended by the maker. If you do not set this, then the RAM runs at wrong settings and/or slower default settings; neither of which you will want to do, otherwise you have essentially wasted your money on whatever RAM you bought since it's never running correctly until you apply said profile.

[_I_]

i meant free as in he already has faster ram, and not using its recommended speed/timings

faster dimms should only be limited by pairing them with slower dimms, or if its unstable at those speeds and forced to use lower speeds due to cpu/mobo combo

[KrzysiuM]

I ve changed to manual ram OC and system is booting normally with EXPO enabled it might work for few weeks fine then its may have some problems with booting(orange static led). I think its occured on some of newer bios for msi x670e that i installed. Before that everything with expo was fine. It has something to do with memory controller in the cpu after that update? I have 7800x3d

[skOsH♥]

I would load the expo profile if you're new to ram overclocking

See if you can lower the timings just a little. You'll have a lower overall frequency but the timings is how fast all that data can be read off the ram and then refreshed with new data.

But yeah as Bad Motha pointed out, higher frequency means slower timings, if you have faster timings you'll have a lower frequency. It's a trade off. Really, you just want to see how low the timings can go and how fast the frequency can get to whilst still being stable and keeping your components evenly balanced under load. If the system shuts down then you need to adjust the timings. The first number, the cas latency, is hard to lower by a significant margin. That's fine. Lowering it even by one makes it faster than one might think.

tRC = tRP + tRAS or be close to it.

tRCD and tRP should be the same.

Speaking of I need to tighten up my tRC it could be lower....

[smokerob79]

had this before....memory was listed in the motherboard compatibility BUT never would run in the profile settings stable....the kicker was setting everything manually to the same timing the profile was, only to have the system run with no issues or blue screens.....system still runs 6 years later with manually set timings that are now saved in a BIOS profile on the mother.....

but even in saying this i would make sure the motherboard has a current BIOS as there have been a lot of updates with all AM5 platforms over more then just new CPU's dropping.....

good luck

[Bad 💀 Motha]

Publicado originalmente por KrzysiuM:

I ve changed to manual ram OC and system is booting normally with EXPO enabled it might work for few weeks fine then its may have some problems with booting(orange static led). I think its occured on some of newer bios for msi x670e that i installed. Before that everything with expo was fine. It has something to do with memory controller in the cpu after that update? I have 7800x3d

Yes on some Motherboard setting the OC to manual is the only way to then make certain changes such as applying the RAM profile