New
#1
What is faster and better for an FX8120: 1866 CL10 or 1600 CL9?
I'm just finishing setting up a new build (will update specs when done).
ASUS M5A97 EVO
AMD FX 8120
4x Patriot Viper 3 8 GB 1600 9,9,9,24
ASUS HD7870 DC2, 2G DD5
2x Seagate Barracuda 1TB, 7200, 64 MB, RAID 0 (yeah, I know. Have very solid backup strategy though)
Kingston Hypex 3K 120 GB
I've over clocked CPU to 4300, 1.39V.
Every thing runs smooth and stable with memory at 1600, 1.6V, 9,9,9,24 T2.
When I try to increase speed to 1866, same voltage and timings, mobo only sees 16 GB out of the 32.
Same result if I try to tighten timings to 8,9,8,24 at 1600.
To get mobo to see all 4 sticks I need to either run them at 1600 9,9,9,24 or at 1866 10,11,10,27. Is this a mobo, CPU limitation, or is there something I could do to get mobo to see all memory at 1600 with tighter timings or at 1866 with CL9 timings? Increase voltage?
Anyhow, what is faster, 1600 9,9,9,24 or 1866 10,11,10 27?
Benching with SiSoft SANDRA I get 21 GB bandwith at 1866 and 19 GB at 1600, in both cases wit above stated timings.
In both cases latency is very poor, around 60 ns. Anything I could do to improve latency?
Also, I read in several places that AMD FX CPUs work better with tighter timed memory that higher speed memory, i.e. 1600 CL9 vs 1866 CL10. Is this so?
Any advice would be very much appreciated.
Jay