Cannot match profiles on two 23 inch Cinema Displays

I have just bought a new 23 inch Cinema Display in addition to my original which is only 8 months old. Using Xrite (GretagMacbeth)Eye One profiler the screens still do not match. The new screen appears much brighter and the 'old' screen much duller. Placing a blank white box created in Photoshop CS3 over the two screens shows a marked difference. Am I to expect this with a screen only 8 months old? How can I get them to match without 'cheating' with the white point? Serious help needed. many thanks.

I don't think that there are any PCI-X graphics cards, and if there were, drivers would be another issue. PCI cards would work in a PCI-X slot, but unfortunately, none of those cards are capable of displaying dual link DVI. The best graphics core you can hope to get via PCI is an NV 6200 or ATI 9250
Also, there aren't any Mac supported AGP cards that have 2 dual-link DVI ports, only 1.
The only way you could do this is to upgrade to a PCI-express based machine and use the Nvidia Quadro FX4500, which is a $1600+ card + the cost of the new G5...
A new G5 MIGHT not be so expensive, as there is or about to be a mass exodus of pro shops that will be getting out of the G5 to move to the Intel Mac Pro soon.
If you had another dual-link capable machine, you could remote desktop in and use a KVM to switch between machines / monitors, but this is sort of a silly complex way of doing something that should be simple through hardware upgrades.

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