Yes, but my CPU is on the overclocking already to 3.4-3.5GHz, but I am having it sometimes at 3.8-3.9GHz, but wasnot liking it on the high temperatures on the 4in1 typhoon aircooling.
I think maybe with the watercooling I would not see a significant increased speed as with the another 8800GTX, considering that I run at the high resolution with biggest AA and AF on the latest games. From my friend google I can see the SLI is good bitches for the AA speed and levelling.

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Currently playing: RCT3(PC), DMC4 (PC). SW: Force Unleashed (PS3)
Favourite Game of All Time: Streets of Rage II (MegaDrive)

Intel C2D e6700 @ 3.33GHz |Gigabyte - GA-EP45-DQ6 | MSI NVIDIA GeForce GTX 280 1GB
2x Raptor 36GB in RAID0 (OS), 5x Seagate 250GB in RAID5 (1TB Storage)
CORSAIR XMS2 Pro 4GB (4x1GB) | LG L226WTQ 22" Widescreen TFT
Creative X-FI | Vista Home Premium x64, Suse x64.