IMac 20" GPU vs. IMac 17" GPU vs Macbook Pro GPU
I've read a bunch of posts about the underclocking of the GPUs for the MBP. My question is what X1600 series card is in the IMac. Is it different in the 20" vs the 17". Is the Moblity X1600 chip in all three models. I''ve read different rumors about the IMac. One stated that early IMac had the X1600 Pro chip because the Mobility X1600 was not available yet. Another stated that the 20" has the X1600 Pro or XT because of driving the 20 inch screen. Another yet stated that the 20" inch IMac with 128mb GPU is the Mobility X1600 and the 20" inch with the 256mb is the X1600 Pro or XT. Isn't there any utilities software to check your chip and what speed its clocked at? I'm confused .