techknight said:

Not worth the effort. I was powering the card on my bench supply alone, and the ammeter was 0.00 so its power consumption at 3.3v is miniscule

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Suspected that might be the case.  SRAM really uses tiny amounts of power.   Still, can't help thinking of unnecessary "optimizations". 

Also, not sure if running them on a 1V Vreg would save much power even if the chips used more current.   Since simple Vregs lower the voltage in part by dissipating power resistively to get to a lower voltage, switching from 3.3V to 1V might just move the power consumption from the SRAM chips to the 1V voltage regulator.