Need help adjusting memory timing

[retsamradassaT]

2.2V
F5a Bios

My current ram:
2x F2-8500CL5D-4GBPK
8GB

CPU:
AMD Phenom II X4 955 Black Edition Deneb 3.2GHz 4 x 512KB L2 Cache 6MB L3 Cache Socket AM3 125W Quad-Core Processor

My Motherboard:
GIGABYTE GA-MA790X-UD4P

What should I change my settings to in order for it to be stable, or for it to be at the most optimized performance?

[GSKILL TECH]

Set the performance enhance setting to "standard". 5-5-5-15 is the natural timing settings for this setup. If that doesn't work, try AUTO settings to see what it picks up. Let me know how it goes. A BIOS update would also be a good idea.

[retsamradassaT]

Alright, I have updated my BIOS to the latest version F5a. My memory setting is at 5-5-5-15. tRC is 48 and Command Rate is 2T @ 2.1V
How do I know what value I should adjust my command rate and my tRC settings to?

And the MHz thing is set to 533, so it's running at 1066.

[retsamradassaT]

So those are my current settings now. Can you tell me if those are okay?

I was told that the FSBRAM should be @ 1:1, but now it's at 3:8 and I don't know if that is okay, or how to change that setting.

Motherboard: GIGABYTE GA-MA790X-UD4P ATX (Rev 1.0)
Video Card: EVGA GeForce GTX 275 Superclocked Edition 896MB
Memory: 8GB G.Skill F2-8500CL5D DDR2-1066 @ 2.1V
Hard Drive: Western Digital Caviar Black 1TB 7200 RPM, Western Digital Caviar Black 1TB 7200 RPM
Power Supply: Corsair CMPSU-750TX 750W
Processor: AMD Phenom II X4 955 (OC'd to 3.6GHz)
OS: Windows Vista Ultimate 64-bit SP2

[genetix]

It's okay to run it like that. depending couple factors like 'Is it stable?'. 1:1 is always fastest there is even on lower speeds.

I am sorry but as these phenom II's comes with damn odd FSBs and insane multipliers I cannot calculate the 1:1 since I have no clue what's your multi and FSB on board.

[retsamradassaT]

A bit late on the response, but nevertheless, these are my current settings:


It wasn't stable, so I decided to change it to the current settings I have right now, and so far, everything appears to be stable.

Multiplier: x18.0
Bus Speed: 200MHz

[genetix]

yep, that looks like good 800Mhz probably is stable also and with 8 GBs on board that will probably be best compo even up to 900Mhz on memory in the end or in OC. The 1066Mhz won't probably fly, but when you OC this board, if you OC just as an reference it will be stable at 1002-1052Mhz. So, as long you'll stay below that on basically any ratio (prefer 1:2 or 5:6) it should be fine. That 800Mhz could do probably 4-4-4-12 as well CL5 just seems too much for 800Mhz (even while I have to admit these sticks ain't too shavy to OC). I wonder how it would bunch up on 266 FSB to x14 multiplier to 1066mhz DDR2, if ever stable. ;P

Either way clad it's working fine and Sorry for late response.

[retsamradassaT]

It can do 4-4-4-12. It's just that I am not that satisfy with the benchmark results with that timing, as I find 5-5-5-12 yields better result.

[genetix]

That would probably be true since the memory controller would be better sync with CL5. However, as is today previous topic we need to understand that when you OC & when you stay on stock timings this whole situation flips up-side-down.

So, to get you on sync with setup you want to run I need much more information. Everest pages chipset for Memory timings, Sensors page would be nice and if it doesn't include voltages then those.

AMD DDR2 timings are fastest when they are fully sync with the board, if not it's just sad to look at. Like you see at changes with 800Mhz to 1066Mhz.

[retsamradassaT]

Don't know how to get it to view voltage, but the memory voltage is set to 2.1V

[genetix]

It's on Computer > 'Sensors'-page hopefully.

Other wise that looks pretty good Except your Latency is 11ns above normal, lol which I have to say is really much. tWR might be 1T(This should be minimum of 7T at 800Mhz and around 13T on 1066Mhz) too low. tRTP could be 3T, Clock drive Strenght and CKE Drive Strenght should all be 1.0x and to improve performance tRC low as possible 25T seems a bit high, but perhaps more stable that way. Also that low tRAS ain't gonna help you, but hurt the performance with full controller with 8GB That on full controller on CL4 should even be minimum 14T and on CL5(and higher clock) should be something like 17-18T to give more room for memory.

btw, that memory could go to 533(1066Mhz) with still CL5. Although, you got 8GBs of it. So, that'll not fly. however, since you are not clocking latencies you could try 2.2v and 1066Mhz clean with CL6-6-5-17 (including those said above). This should be a lot faster than what you run now because the DRAM:FSB Ratio will give up to you on so called 'Performance Level' (I have to admit still that 2:1 ratio is something I have yet never tested what is on screenshots whole new thing to me too). ""Where your current setup does not.""

hope that helps to advance.

[retsamradassaT]

Now that I have posted my sensors, shall I proceed with the changes you recommended, or should I wait for your response to see if there's anymore settings I should change?

[retsamradassaT]

400MHz settings:


533MHz settings:


I don't know how to change the clock drive strength and the rest of the strength settings, I don't see an option to change any of those in the bios, so I didn't bother with them.

About the tWR, @400MHz, the highest it would go is 6T, and @533, 8T.

[genetix]

Yeah, tWR is compined value in this case. keep it on 4-6T seems functioning a bit differently on this board. Less it is more possibility for errors. Speed difference is near nothing and speed actually rised 200MB/s by simply tRAS change. That tRC on 400Mhz should be around 16-17T minimum (it's ok if it doesn't error on 11T), but try to go with scale: minimum on 400Mhz, at least 24T on 1066Mhz anything above and it should be minimum of 31T. This is very important for aspect.

7806 MB/s we are begining to get somewhere. 54.5 ns is still too high that board should go to 46-52ns when all is good usual I tested was 49.xns. Core speed is good 0.8ns on L1 L2 most be around 4.8, atm, lol. (btw, you can get the v4.60 of everest for free legit from google).

We should all in all be able to go to 9000MB/s on even good 800-900Mhz, but nowhere near CL5 and if CL4 was bad kinda stuck in there.

that seems so damn well functioning that 1066Mhz on 6-6-5-18 try dropping that to 5-6-5-17(If this boots/POSTs it could be possible also to boot 5-5-4-17 so try that too.) and drop me another of those everest benchmarks, if you can. You might need to raise the tRC for this one a bit and drop the tRRD to '4', hopefully not. Don't worry on drive strenghts they'll automate probably. Memory basically is exact 1.00x, but well if board can do better than that, ok. Probably when we reach some decent timings the strength will be 1.00x just try to see that it's never below 1.00x, 0.75x is just bad idea.

If any of these settings feels stiff on when you POST, check the Test #5 on memtest (you can simply select it) and let it go through (takes ~30seconds), if that errors that means voltage is too low or latencies main latencies are too much aka. windows will not function in any case. On the end we can do basic testing to know that memory is stable, but we'll get to that when we first know where's the limit.

[retsamradassaT]

The lowest tRP can get to is 5, so I can't test your 2nd suggestion.