OCZ Flex EX PC3-17000 12GB Triple Channel Memory Kit
Author: Shawn Knight
Editor: Zahn Funk
Date: 11-23-2010
Provided by: OCZ Technology
Installation / Test Setup

I will be testing the Flex EX using the following hardware.

Intel Core i7 940
Noctua NH-D14 Cooler
Sparkle GTS 250
OCZ 50GB RevoDrive
BFG Tech 550w PSU
Corsair Obsidian 800D

The ASUS motherboard I will be using has six memory slots: three black and three blue. According to the manual, you want to use the three blue slots for a standard triple channel configuration, so that is how I installed them.

As mentioned earlier, the heatspreaders are pretty large and could interfere with your CPU cooling setup, as was the case with my hardware configuration. The Noctua NH-D14 is a massive heatsink with two large 140mm cooling fans. I had to remove one of the fans in order to clear the first memory module. This isn't a huge problem in my situation as one cooling fan is enough for this heatsink since the processor isn't overclocked.

Upon installation, the system boots the modules at 1066 MHz and “auto” timings – in this case, 8-8-8-20. CPU-Z reports the frequency as 1087 MHz, however.

To test the OCZ Flex modules, I will be benchmarking them at the default 1066 MHz, 1600 MHz and the highest stable speed I could obtain, 2093 MHz.

I had hoped to take these modules up to at least their rated speed of 2133 MHz, but the IMC in the i7 940 I am using simply wasn't able to handle such high speeds, regardless of how much voltage I pumped into the QPI / memory bus. I dropped the multiplier down as to not overclock the processor. So in summary, I will be testing:

1066 MHz, auto timings of 8-8-8-20, auto voltages
1600 MHz, auto timings of 9-9-9-24, auto voltages
2093 MHz, manual timings of 9-9-8-24, 1.65v memory and QPI

Let's move ahead and put these modules to the test.

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