Question AMD Generally SLOW transfer speeds, dropouts


May 13, 2009
After a couple of years messing around with insufficient transfer speed, probably bottlenecks etc. I feel like bugging the lot of you with my trouble, as Google can't help me anymore.

I'm putting all my specs from HDTune Pro read tests into this post, my system specs are in the signature.

  1. Slow SSDs
  2. HORRIBLY slow USB 3.0 RAID 5 with massive dropouts
  3. Slow RAM (default MoBo settings, seem to be set to 533, but should work at 1066)
I know the system isn't high-end, but I don't think it has to suck so bad.

I'm mostly doing photo editing, sometimes audio,which works OK, but I know it must be able to work better. Especially Photoshop is slowing down massively with certain tasks, although there's extra scratch space.

I do not game, no OC.

There is a USB 3.0 boost available in the Asus interface, plus all sorts of turbo this and that. Never touched any of it.

I really must have messed something up terribly, I hopy someone can give me pointers!

SSD System Drive:

SSD Applications:

SSD temp/scratch dirve:

External USB 3.0 RAID 5:

External USB 3.0:

Data 1:

Encrypted data:

Data 2:

Data 3:



Please help!

Cheers :)
I think I'd start my testing by removing the tiny 64 GB SSD, disconnecting all other scratch/application junk drives, and fresh installing your OS and applications (including benchmarking) software to the 840 EVO...; benchmark in just that state initially... IF all looks well (400-500 MB/sec reads), add an internal storage drive, and test it in CrystalDiskMark (most 7200 rpm drives will get 150-175 MB/sec, 5400 rpm drives will linger near 80 MB/sec...
Let's first see if it is capable of sustained 400-500 MB/sec transfers in benchmarks when not hindered by multiple drives' access times potentially hindering performance...

Lots of USB3 circuitry in external drive packages will throttle under sustained heavy transfers, and might actually do better under simple USB 2.0 connections/specs.....(no external USB RAID 5 with only 3-4 disks will realistically sustain 150 MB/sec reads anyway, and any hardware solution will have to have adequate cache to sustain speeds for lots of writes)
Reactions: corniger


May 13, 2009
First off: THANKS!

All right, I'll get a fresh, large SSD then and proceed as you described, I need to switch to Win 10 anyway, unfortunately.

My main concern are the SSDs, so I hope to get that under control. I've got the spread over the 4 SATA channels and plugged the others in on the secondary conncectors.
Generally speaking: are there too many HDDs connected? I just need several for the following purposes:

1 System
2 Appclications
3 temp/scratch for photo/video - best 2 of those
4 at least 2 drives to stream data from (video) to get acceptable read times

Atm I have 4 SATA channels with 2 connectors.

The External USB 3 RAID:

mixed data results:

larger video files:


I know there are always problems with smaller files - the tiny XMP files that come with the photos bog the transfer down, but it just entirely halts sometimes, is that normal behaviour?

I'll take a while to perform the tasks you mentioned, my main problem is time, but I'll manage next week, probably.

Thanks so much!


May 13, 2009
All right, I switched to Win 10, istalled a fresh Samsung 860 Pro with 512 GB as system drive, threw out the 2 Ooldest Sata drives and there we go, +100 MB/S speed.
I did NOT test with that 860 Pro alone, but at least there's one drive less in there. I left the old system drive connected to play safe with presets etc, in case I don't need it, I'll pass it on.

Readings with HDTune Pro:

System (sharing port with the disk below):

Programs (access time??):


USB 3 RAID (also better than before):

Data 1 (3 GB, 5400)

Data 2 (500 GB, 7200, but SATA 3)

So, this is looking much better imo. What do you think? If I threw out the redundant old 64 GB system disk, it could free up more bandwidth, right?