CS4 running extremely slow compared to CS3 - Adobe Photoshop

We are finding the same problem here on two different machines, both running xp64 though. 32 bit and 64 bit versions of CS4 are running extremely slowly (non GPU mode).

Was something changed to augment the GPU functionality that hurts performance on systems that can't run that stuff?

I have the same problem and I also would report some kind of bug - the UNDO is not working and I need to use the history every time.

Adobe Photoshop Version: 11.0 (11.0x20080919 [20080919.r.488 2008/09/19:02:00:00 cutoff; r branch]) X64
Operating System: Windows XP Professional 64-bit
Version: 5.2 Service Pack 2
System architecture: Intel CPU Family:6, Model:15, Stepping:11 with MMX, SSE Integer, SSE FP, SSE2
Physical processor count: 2
Processor speed: 2666 MHz
Video Card: NVIDIA GeForce 8600 GT
Video Mode: 1680 x 1050 x 4294967296 colors
Video Card Driver: nv4_disp.dll
Driver Version: 6.14.11.7824
Built-in memory: 8122 MB
Free memory: 5897 MB
Memory available to Photoshop: 7180 MB
Memory used by Photoshop: 60 %
Image cache levels: 4

Shyam,

Have you tried disabling OpenGL support (in Preferences > Performance) to see if performance is better without GPU?

If it is still the same, and sluggish compared to CS3 on your same system, I'll have you contact me directly.

thanks,
-Adam (PS QE)

My problem was resolved using just CS4 (without 64 bits).

For me, this option (disable or enable OpenGL - "No GPU available with Photoshop standard) is not working. I don´t know about the others.

My files are really big (some PSD file have 200mb) and I intend to use the 64 bits but I can´t...

Adobe Photoshop Version: 11.0 (11.0x20080919 [20080919.r.488 2008/09/19:02:00:00 cutoff; r branch])
Operating System: Windows XP 32-bit
Version: 5.2 Service Pack 2
System architecture: Intel CPU Family:6, Model:15, Stepping:11 with MMX, SSE Integer, SSE FP, SSE2
Physical processor count: 2
Processor speed: 2666 MHz
Video Card: NVIDIA GeForce 8600 GT
Video Mode: 1680 x 1050 x 4294967296 colors
Video Card Driver: nv4_disp.dll
Driver Version: 6.14.11.7824
Built-in memory: 8122 MB
Free memory: 6277 MB
Memory available to Photoshop: 3255 MB
Memory used by Photoshop: 70 %
Image cache levels: 4

I am finding the same problem, but using 32bit or 64 bit does not seem to make much difference. It's more pronounced on my second workstation though. The first uses an 8600 GTS, and the second uses an 8800 - the 8800 is actually slower.

I tried the registry 'hack' and it does speed things up on the first machine, but it craps out often. It won't work at all on the second machine so I can't try it there.

b

Same problem here.

AMD Athlon 64 x2 5000+, 4gb ram, ATI 1950 videocard running windows xp and vista 64. Photoshop cs4 is much slower than cs3. When I paint something the brushstroke is very laggy. I tried turn off opengl it is a little bit faster but still very slow, both 32bit and 64bit have the same problem. Cs3 is running very smooth and have no problem at all.

Maybe it's a gpu thing as my undo, open layer panel, create layer, move layer, delete layer has a 4/5 sec lag ( all this instant in cs3 )on large files.

Large is relative, but from what you said elsewhere Chris, large for you is really large. I rarely have files bigger than 100MB, so I don't see any problems.

oops, just did an edit.

But, yes...it's fine on images that are less than 1gb in size. CS3 was snappy in this respect on the same file.