Why is Acronis so much faster on new computer?

When I run my ATI 2021 on my old 6 years old computer to backup the Windows System Partition with a size of approx 100 GB (used: 67 GB) with max compression, no encryption, VSS, verify after run, 16GB RAM memory, hard disk based

then it took appox 3 hours (!) to complete.

When I run now the same ATI software on my new computer with the same parameters as above then it took only 3 minutes!

There are lots of reasons why the old computer is much slower!

Using max compression will impact on performance depending on the CPU involved, as will the slower disk technology (HDD vs SSD), plus the possibility of fragmentation on the HDD as well as more accumulated 'dross' compared to a new computer with minimal usage.

SSD drives are much faster & more responsive so a faster backup would be expected, but you haven't mentioned the size of data involved for the new computer?

What are you backing up to here?  If going to a USB drive, what technologies are involved? I would expect your old computer to be USB 2.0 but the new one to be USB 3.1 or 3.2 which again is around twice as fast assuming you have a storage drive capable of using the same standard.

Validating after a backup is also a potential factor here - this again will be slower on the older PC due to the technologies involved, data transfer rates and potentially, the size of backup data / version chains involved.  Validation has to read back the whole backup from the storage drive in order to compare checksum values and recalculate values from the data read.

The size of the backup archive file really depends on the source data size and potential compression reduction achieved, so circa 11GB is probably correct at a guess.  Again, what is this being compared against from the old PC?

You mention the new computer has SSD vs hard drive on the old computer. That is a major change with respect to speed, how much depending on specs of both.

Is it still a 16GB memory configuration? I would think that 16GB is enough so even if you went to 32GB that probably would not make a real difference.

You don't mention change in CPU but that could potentially make a big difference since there is a lot of CPU activity involved. You probably have a faster CPU, more cores, etc. That can really improve throughput.

I'll bet there is a lot of difference in the Windows configuration on the new machine. Starting with a cleaner configuration can make things run smoother. The bloat isn't there yet. You said it is an 11GB backup

As Steve said, if you went from a USB 2 to USB 3 connection to the backup drive, that can be significant.

Over time, Acronis' database grows and while I don't really know what the impact would be, there could be a factor there.

To answer your final question... I would say yes, you can trust ATI there.

When I run my ATI 2021 on my old 6 years old computer to backup the Windows System Partition with a size of approx 100 GB (used: 67 GB) with max compression, no encryption, VSS, verify after run, 16GB RAM memory, hard disk based

When I run now the same ATI software on my new computer with the same parameters as above then it took only 3 minutes!

 Does the new computer also have 67GB of used space on the new SSD?  If not your comparison is like that of apples to oranges.

Ok, the new computer has new hardware and an SSD but a runtime improvement from 3 hours---->3 minutes is somehow unbelievable.

Either ATI had a problem with old hard or the ATI does not run full and correctly on new hardware. The created archive size looks good (~11 GB).

So can I trust ATI an new machine?

A total archive size of 11GB sounds like a Windows only or a Windows and a few small apps backup so this is going to have a huge impact in performance.  VSS works in free space on the source disk.  Your previous PC had 67% of the free space used leaving only 33% of the disk for VSS use.  If we reverse that and give the new PC 67% free space in which to work the snapshot of the data on disk is going to be created much faster which helps in performance times.  As others here have stated, the move to SSD over HDD is a big improvement in performance just by itself.

Can you trust ATI on your new machine?  Yes.

As a comparison for you I recently built a new PC using an NVMe based SSD for Windows.  I always make a full backup of the OS once installed and updated.   Using normal compression and backing up to another SATA SSD internally this backup totaling about 11GB took less that 30 seconds.

@enchantech:

Thank you. Very interesting.

Didn't know that free space is so important: I thought that  ATIs job is done mainly in memory. The C: partition on the new machine is used by only 40%

Your "less than 30 second value" is valuable as well.

Are there somewhere other runtime values listed (with corresponding sample configurations)?

Peter,

There are not runtime value lists as you call them that I ma aware of.  I would not expect many configurations to perform at the level I quoted.  In most cases user observe backup performance on machines that have a good number of apps installed and at least a fair amount of user data.  My report is of a clean Windows OS install with only Windows updates applied.

The reason I test like this is to know what the base line for the system is.  As apps are installed and user data grows I expect performance to decrease so when it does it is not a surprise to me.  In general though I find performance of Acronis very good but I attribute most of that to the high performance hardware I run.