Photoshop CS4 is a disaster

Yup, I tried the different screen sizes, and that did make a dif. But then again, who in the business doesn't use large monitors? Shouldn't Photoshop be able to work at high resolutions (CS3 did)

Intel Core2 Quad 2.66GHz
N512MB nvidia 8800 GT (driver ver. 7.15.11.8048 - the latest one at the time of this writing)
8GB RAM
Vista 64
Dual monitors (1920x1200 each)

I took over 2 hrs to go through every post on this thread yesterday. So far I tried everything suggested, but no help. CS4 is still unusable. Faster @ Cache level 6, but still unusable.

After doing some testing...

It seems the slow down while adjusting color curves is related to resolution.

On a 30inch LCD, 2560x1600 native resolution and working on a photo with a resolution of 2592x3888...

If I zoom 100% and adjust a color curve (adjustment layer color curve). I get very slow feedback while adjusting color curve.

If I zoom out to 50% and do the same, I get realtime feedback on color curve adjustments

If I create a 1024x768 image and zoom in at 100%, I get realtime feedback on color curve adjustments.

Photoshop seems to not be performing well at high resolutions.

This is with a Geforce 8800GTX and a Intel Quadcore.

Note if i dont maximize the photoshop window and I make the entire window a lot smaller, It will improve performance in GPU mode.

So resolution is certainly a factor but what i dont understand is why i can run opengl apps at 2560x1600 without problem and not something as simple as a color curve correction on a 2d image.

I would be careful with cache of 8 --- you may chew-up a lot of memory if you open more then one large document at a time.

Consider, do you need 8 levels of live zoom per image? If one small image at a time, ok... If several large images at a time, probably not a good use of available memory...

Glad CS4 is better for you...

Hugh

After reading Hugh's post, I disabled "Documents as Tabs" and this sped up Photoshop CS4 significantly. Now brush strokes, screen redraws, menus, etc, are working much faster in comparison to the excessive sluggishness that was before.

Earlier I had disabled OpenGL and allowed old graphics cards, using Adobe's registry patches. I also set cache levels to 8.

One or more of these is responsible for the speed boost. Photoshop CS4 is usable now. It's not as fast as CS3, but usable.

Cook,
What company made your video card?

When you Google your video card the sites make note of some cards shipping out with defective capacitors. CS4 gives video cards a pretty good workout. That said, do you think your video card might be one of the defective ones thus causing your problems?

You wanted facts and not "theories". So here is something you can work on.

and I repeat: CS4 is NOT a disaster.

It is working way skippy for me!

Nowm, tell us how you really feel....

XD @ JJ

We need to get a few Hawaiians in here! B)

WHAT?!! H.A.L., I SAID open the hatch!