1333mhz DDR3 using i5 Ivy bridge?

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26 Aug 2011
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Just bought a second hand Dell Optiplex 9010. Has 4 slots and uses Q77 chipset on an i5-3570 Ivy bridge.

Unfortunately it came with 1x4gb 1333mhz ram.
I have 2x2gb Corsair XMS3 1600mhz 1.65v from an old build which defaults to 1333mhz at 1.5v (I think).

I highly doubt the dell bios will let me use XMP settings, so how much of a performance hit would I get for using 1x4gb 1333mhz and 2x2gb 1333mhz ram? I'll be using it for work and a spare gaming PC.

Would you:
1. Keep the same (mix single and dual channel @1333mhz). (total 8gb)
2. Get another 4gb 1333/1600mhz ram for around £10 and run @ 1333mhz - (total: 12gb)
3. Discard all ram and get 1600mhz+ ram (total 8gb for £20)
 
Totally depends on what you are using it for, if you are gaming then selling all the RAM you have and buying 2x8GB used might not be a bad idea, if you can get MM access.
 
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