I was wondering what the block chain size is on everyone's system. I have fully synchronized and find that the chain data folder continues to slowly increase in size, as is to be expected.

However, I know the size of the file can differ quite a bit. I am wondering what size your files are on different machines and when synchronizing via different methods.

My current chaindata folder shows a size of 28.4 gb.

I performed the sync with:

  • OS: windows 10 64-bit system
  • CPU: i5 3507K (no OC)
  • GPU: gtx 670 (don't think this matters at all during synchronization)
  • RAM: 16 gb DDR3 2400mhz (running at 1600mhz)
  • HD: SSD Samsung 840 256gb

Initial sync was performed by:

geth --fast --cache=4024

I believe I was fully fast synced within 4 hours of initiating with a Samsung 840 SSD and 16 gb of RAM, but from what I understand, geth will only use the ram that you assigned via the 'cache' modifier, so I am assuming it was using 4 gb of system RAM to speed things up.

Processor is a i5 3507K. System is liquid cooled, but during the synch process, I did see CPU temps move into the mid 50's to 60C range.

Also, after full sync. I closed the geth synch command prompt window shell and then used:

geth --cache=4024 to catch up again after stopping the synch for a little while to see if I would have any issues re-initiating synchonization.

Just wondering what chaindata file sizes are on other people's systems

  • @TravisJacobs, it is definitely in the same line of questioning. I was just trying to get a range of numbers currently for various users out there in terms of block chain size on different systems and with different configurations. It might give people a better ideal as to how long they need to wait until they have synchronized the full block chain when starting for the first time.
    – John H
    Jul 23, 2017 at 22:44

1 Answer 1


160.55 GB is the full chain up to block 3,985,180 on a Mac.

  • Wow, that's getting up there!
    – John H
    Jul 25, 2017 at 21:24
  • It's becoming unmanageable. Jul 26, 2017 at 1:02

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