Victoria Bampton wrote: Don't forget to include details such as your system specs Not to sound too negative, but people have been doing that since day one of 4.0, and still nothing even remotely resembling a pattern has emerged. Hardware-wise, it's just completely random. Yes, PV 2012 is CPU-intensive, but old single core laptops churn happily along while high-end octo-core workstations choke. I have two systems, one has performed well ever since 4.0, the other one (although older) has had problems in varying degrees with the different versions. Two things that helped were updating video card driver and swithing from LUT to matrix-based monitor profiles. Still, there is something odd going on, and those two things were clearly relieving symptoms but not curing the disease. Good machine: Core i5 750 (the only quad-core i5), Gigabyte UD3 mobo, H55 chipset, 16 GB DDR3. Win 7 pro 64-bit. Bad machine (old, but still performing as new): Core2Duo E6750, Asus P5K, P35 chipset, 8GB DDR2. Vista business 64-bit. Video card identical, ATI HD 5850, same driver version. Software installed identical, the two machines are kept synchronized at all times so that I can work on either. WITH ONE EXCEPTION: calibration software. Good machine Eizo EasyPix, bad machine Color Eyes Display Pro. --- I'll be replacing the Vista machine in a month or two, and when I do, I'll install Lightroom on a completely naked OS and test for each piece of software added. If time, I'd also like to do the same with the old machine before it's ditched, just out of curiosity.
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