Abnormally fast SSD ?

[tufC70]

Hi,

 

I know it's not common to complain about that but my ssd is just crazy .... So I have two Crucial P1 1tb in my system.

The first one have insane result in CrystalDiskMark :

The second is normal for a P1 :

 

I initially tested my drive because I had a bit of freeze in games and in Rainbow Six Siege my drive was extremely slow to load things (some times), with the first ssd so why is my ssd so fast and is it related to the games issues?

 

Any idea will be realy appreciated.

 

My pc:

- Amd Ryzen 5 5600x

- Corsair Vengeance pro 32go 3000mhz

- Gigabyte B550 Vision

- Gigabyte RTX3070 Vision

- 2x Crucial P1 1TB

- Corsair AX760 760w 80+Plat

 

[mariushm]

If you installed the software that comes with it, there's some ram cache stuff ... it caches writes to ram and then dumps them to the ssd in big chunks.

[Guest]

As said, it's likely caching software. It makes for pretty numbers, but doesn't often translate to real world use.

[tufC70]

Thank you for your answers, so it is normal and not related to games issues 

[tufC70]

Alright It is Crucial Momentum Cach. I disabled it for testing but in Crucial software, they say "It is recommended to enable Momentum Cache on your startup disk."

 

So should I enable it ?

[Guest]

12 minutes ago, tufC70 said:

Alright It is Crucial Momentum Cach. I disabled it for testing but in Crucial software, they say "It is recommended to enable Momentum Cache on your startup disk."

 

So should I enable it ?

I mean, of course they're going to tell you their software is recommended. I don't like caching software like that as power loss can lead to data loss/corruption and there are few benefits.

[NewMaxx]

My advice is to disable Momentum Cache in almost all cases. There are potential niche uses, however in general it's not going to benefit you beyond benchmarks.

 

Essentially, Momentum Cache will dedicate some system memory (RAM) towards data caching for a specific SSD. Under normal circumstances your OS already caches data in RAM more universally. The danger is, of course, that volatile memory can lose data in the case of power loss. By adding more complexity - that is, per-drive caching on top of what the OS already does - you are only increasing the risk. As far as performance goes, the fact is the data has to be committed to the drive sooner or later and you will be bottlenecked by the speed of the drive well before your memory. What this means is that no matter what the benchmark says, the ultimate writing of data will not exceed the SSD's limitations anyway.

 

There are reasons data is cached, of course, for example you can defer writes that are later not needed (reducing unnecessary writes) and you can combine many random writes into a sequential transfer (which is faster and also reduces write amplification). Again, Momentum Cache is different only in that it has dedicated memory for a particular drive, which is fine if you have sufficient free memory, and generally today people have more memory than they need. The issue is, a modern OS will use extra memory to cache applications and such already, so it's not like it's going to waste anyway. There are applications that give you stricter control over caching, like PrimoCache, which is more flexible but again fairly niche because a RAM cache for a SSD requires you to have specific needs.

[tufC70]

Thank you very much for the explanation. I just play game on this pc so I think I don't need that cache even if I have more than enough RAM.

 

I will try without It if game issues are solved.

 

Again thank you for your help

[NewMaxx]

Oops, I didn't address your RB6 issue. Well, see if disabling it helps, if not we can probably narrow down the problem.