G.SKILL Ares Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory $90

Newegg has the G.SKILL Ares Series 16GB (2 x 8GB) 240-Pin DDR3 SDRAM DDR3 1600 (PC3 12800) Desktop Memory Model F3-1600C9D-16GAR
22% off, $89.99 (Free Shipping (restrictions apply)
Check now: Link [newegg.com]
*16GB ultra high capacity memory.
* Low profile heat spreader for better compatibility with extra large CPU coolers and small form factor PCs.
* Compatible with Intel LGA1155/LGA1156 and AMD AM3/Llano/AM3+ platforms.
* Intel XMP support for 1st, 2nd and 3rd Generation Intel Core Processors.
Limit 3 per customer
Shipping - The shipping cost for this product is $0.00 (Free) via Egg Saver shipping (guaranteed 4-7 business day service).

How do these work in pre-built HPs and Dells? Do they run at 1600MHz or do they drop to 1333?

Quote from deelseaker : How do these work in pre-built HPs and Dells? Do they run at 1600MHz or do they drop to 1333?

Shouldn't be a problem unless you are mixing with other rated speed memory. All system memory will default to the slowest rated speed installed.

Quote from Xaijin : Shouldn't be a problem unless you are mixing with other rated speed memory. All system memory will default to the slowest rated speed installed.

Or the fastest the mobo can run at