Timings & Frequency

[Aontaigh]

I have "Kingstone HyperX Blu" (2x4GB) 1600MHz and my processor is a FX 8320 @ 3.8GHz. I currently have my memory at 2000MHz 10-11-10-28. I previously had it at 1600MHz 9-9-9-24.

Which one should I use in your opinion. Is there certain advantages of one compared to the other in certain situations such as gaming?

[skullbringer]

If the 2000-10-11-10-28 is stable, Id say go with that. Thats a pretty respectable overclock.

[Covn]

Really depends on what you're using it for, but there aren't many tasks/games that take advantage of the higher speed. You'd be hard pressed to see any tangible difference in actual use.

 

That said, its a good speed increase for a small timing increase. 

[Aontaigh]

I'm more than likely going to the 2000MHz from what I've researched.

2000MHz 10-11-10-28 is now 2005MHz 10-11-10-22

[deathjester]

2000MHz 10-11-10-28 is now 2005MHz 10-11-10-27

 

Test it with AIDA 64 cache/memory benchmark. Go with the lowest latency (speed of ram changes latency). Maxxmem also works and is free.

 

I can tell you from experience though that cl10 2133 at timings in my sig blows away 1600 cl9. It also beats 1866 cl9 (but not by that much). 

 

When you get to 11+ on the first number is where faster ram starts to suck.

 

Also? T1 is faster then T2. Test with maxxmem or aida. 1866 9-10-9-28 T1 might be faster then cl10 2000 T2. Speed of ram changes latency and it gets all weird. Benchmarking it is the easiest way to see the difference. If using maxxmem run it like 5 times and take the average and compare.

 

You might also be able to get 10-12-x-x t1 at 2133. The second number isn't nearly as big as the first as far as performance and the 2nd number is usually what needs loosened. T1 matters a lot also. 

[Aontaigh]

2005MHz 10-11-10-22 1T is what I'm currently at. Is there anything which I could do to achieve 9 on the first one? Raising other timings, etc.?

[-rascal-]

1T command rate is slightly faster, but it may not be stable for some overclocks.

2T is slightly slower, but may resolve some stability issues.

 

The chance of getting CAS 9 to be stable at that frequency is slim, but never impossible. Give it a try.

[Aontaigh]

I lowered it to 9 and Windows crashed, it is now at 10-11-10-22 1T @ 2000MHz. Would it be beneficial to raise it to 2T to achieve 9 or how could I achieve 9?

[deathjester]

I lowered it to 9 and Windows crashed, it is now at 10-11-10-22 1T @ 2000MHz. Would it be beneficial to lower it to 2T to achieve 9?

 

Yup first number is most important.

 

If your temps are ok, stability test with prime blend for a few minutes (just a round). If it goes that far you are ready to game on it and memtest it while you sleep.

 

Like I said test it with maxxmem or aida. Shows latency and bandwidth. For gaming go with lower latency and that number will change based on speed of ram.

 

1866 cl9 t1 is the easiest. laziest route to GOOD gaming memory. Past that? Lot's o testing. Add to that, Haswell handles up to 2400 with ease. AMD? Not so sure about, so it could get really weird with stability testing if you are OC the CPU.

 

CPU clock>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>Ram speed. Don't sacrifice a cpu overclock for faster ram. 

[Aontaigh]

9-11-10-22 2T @ 2000MHz - This was not stable, any suggestions?

[deathjester]

9-11-10-22 2T @ 2000MHz - This was not stable, any suggestions?

 

2133 10-12-10-31-T1 150 TRFC is what I run mine at with 1.56v.  1866 1.5v 9-10-9-28-t1. Both are very fast for gaming and don't use obscene voltage and run hot. Who knows you might get 9-9-9-27 t1 at 1866 which would be obscenely fast. Higher speed is not always better. Ram usually either goes high or does good timings low. They are like a box of chocolates. I wouldn't spend too much time on it though cus when you buy an aftermarket cooler for the 8320 and take it past 4 ghz (which will give you MAJOR gains compared to ram)? The timing past 1866 might not work.

[Aontaigh]

I may go down to 1866MHz and go for CL9. Does anyone have any suggestion for getting the 2000MHz to CL9? Also, would the lower timing of 1866MHz outperform the higher timings of 2000MHz?

[-rascal-]

Try increasing the voltage to 1.6V or 1.65V. If it doesn't work, CAS 9 is just not stable.

 

If 1T works, use 1T instead of 2T.

 

Tweak the other timings values a bit more?

 

Also, increasing (overclocking) the CPU-NB frequency will also improve memory performance.

 

Stock CPU-NB frequency is 2000MHz.

 

(Look at the memory read, write, and copy results)

 

[deathjester]

I may go down to 1866MHz and go for CL9. Does anyone have any suggestion for getting the 2000MHz to CL9? Also, would the lower timing of 1866MHz outperform the higher timings of 2000MHz?

 

Voltage. More voltage = higher speeds timings. Problem? Ram will run hotter for not much gain. In games I see maybe 1.5 fps increase from 1600 to 2133. The 1 fps increase came from 1600 to 1866. In rendering? The difference is bigger but still way behind clock rate on the cpu.

 

As far as the numbers you are using. 9-11-10-22. The 22 should be like 28 plus. It used to be that you want around the sum of the first 3 numbers as the 4th. It still holds pretty true. So 30 is what I would start at and see if you can down from there. The second number you don't want more then 2 from the first.  Third usually one less then the second. 

 

You not being stable at 2000 could have everything to do with the CPU/MB as well. Haswell has an incredible memory controller and is about the only real upgrade from Sandy/Ivy. 1866 is supported by AMD. Past that is all "maybe". 1600 is supported on intel, but the memory controller on Haswell will handle up to 2400 on any CPU overclock and not sweat.

 

I would dial in your top 1866 first and get an aftermarket cooler. Past that? You might gain .5 fps in a really cpu bound game like an MMO. In GPU bound games you will see no improvement unless you use integrated graphics. 

[Aontaigh]

My voltage is at 1.65 and my CPU NB is just under 2400MHz.

[deathjester]

My voltage is at 1.65 and my CPU NB is just under 2400MHz.

 

Well I think you are tapped out in the voltage department

 

Work on cl10 2133 or 1866 cl9 timings and lower voltage imo. I don't think I would run 1.65v unless I was at 2200-2400 with awesome timings. You CAN but I mean why push the memory for so little gain. Your ram has a sweet spot at prob 1.55-1.6v. I would stay in that range.