Best Performance - Module Speed/Cas Compatability Questions

[MNSwiftOne]

Hello,
System: Intel DP55WB, i7 860 2.8GHz
Memory currently installed: 2 x 2GB of
F3-10666CL7D-4GBRH 7-7-7-21 DDR3 1333 (PC3 10666)

Amazing to discover an i7 with 4GB is terribly slower than a Quad-core with 8GB

I would like to add 2 x 4GB DDR3 modules -
possibly one at first, then a second due to financial restrictions...

My closest available guess is:
F3-12800CL9D-8GBRL 9-9-9-24-2N DDR3 1600 (PC3 12800)

My preference would be to purchase Cas 7, 4GB modules
- but I cannot find them at 10666 or higher at 1.5v.
(and I do not want to run 1.6v memory)

There is a Cas 7 - but the speed is much slower:
F3-8500CL7D-8GBRL 7-7-7-18 DDR3 1066 (PC3 8500)


Please can someone recommend what the best performing configuration given I own the 2 x 2GB mentioned above?

Will there be problems with Cas 7 versus Cas 9?

If I pick the Cas7 4GB - is the system going to not perform at 1333, will the 1066 slow down the other bank?

More Importantly - Is G.Skill going to release a 4GB Cas7 10666 or higher soon???

Thank you,
Todd

[GSKILL TECH]

The two kits may not operate together. I would suggest using the same memory package. In order to operate full slots, the memory specifications must be the same, otherwise you will need to operate them at the settings of the lowest rated memory package.

We may release low latency DDR3-1333+ 4GB modules in the future, but currently any 4GB modules are expensive, and demand is low, so it may be some time until they are available.

Thank you
GSKILL SUPPORT

[MNSwiftOne]

Best Performance - Module Speed/Cas Compatability Questions

Thanks - guess I'll go with the same then... two more 2GBs.

>We may release low latency DDR3-1333+ 4GB modules in the future...
Tell your development department if they are priced similar to existing 4GB - I'd buy a pair!

Thanks
Todd