Solved RAM DDR3 1866 CL 7 or 2133 CL 9

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February 11, 2014 at 18:40:38
Specs: Windows 8.1 64 Bit, AMD FX-8350 8 Core @ 4.0 GHz w/ 2x4 DDR3-1600
Hi All,

Sort of building off of a previous post here.

So if you clicked the link, you would know my CPU can only use 1866. Anyway, what do you guys think would be better, trying to find some 1866 with latency of 7 (maybe 8), or buying 2133 and 'underclocking' it, essentially setting it to 1866 and tweaking the timings to get better latency?

Which of these options do you think would give me the best overall timings and stability? Basically, is medium grade 2133 better or worse than high-end 1866?


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February 11, 2014 at 19:11:41
✔ Best Answer
We went over this in your other thread, everything you need to know is there.

- official JEDEC conforming RAM must be able to run at it's advertised speed at 1.5v
- official JEDEC RAM support ends at DDR3-1866
- all RAM rated higher than DDR3-1866 requires 1.65v (or higher). That means the faster RAM is most likely just overclocked DDR3-1866 that's overvolted to be able to run stably at the higher speed.

I'll repeat the quote from the other thread about running fast RAM with an FX series CPU: "At the end of the day, you will need to be the judge of whether or not the added expense is worth the marginal performance increase"

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