Hi again...

I am aware that Pshop isn't rendering anything....I just mentioned it to show that this PC is quite capable of handling huge files at speed....Your comment re jpegs is noted, but in Photoshop much of what I do is left as psd or Tiff, depending on what I need....However, I have had no success with D/S using Tiffs either.

There is nothing untoward running on the PC other than the OS (XP Pro), normal Windows services etc....and the NVidia Graphics card when it needs it.

I have tried turning off/disabling the AV and Malware programs (which I sometimes do for Pshop) as I am also aware that these sometimes can have an affect on speed....although I would not expect this to show up much on anything other than 'smaller' PCs.

This PC is also networked to another right next to it and have even severed that connection without any noticeable improvement.

If you can bear with me please, I will have another look at an even simpler image later today and post it.

Thanks Al.