MCH Voltages/tRFC (Refresh To Act Delay) & More Than 2 X 1GB of Memory
When using 2 X 2 or more of Memory you will have to add more MCH Voltage. How much is up to the ram you are using, the board itself, and overall memory performance.
Suggested MCH Voltage to add (Even for 2 X 1 GB) is +0.1V. When you start tweaking, Overclocking, or just plain using 2 X 2GB or more you will need to add More MCH Voltage. Amount will Vary but just moving up to +0.15V or +0.2V will usually do it for 2 X 2GB. More of course will need more.
Trial and error is the only way to know for sure how much your board and ram will need, but +0.3 is almost never necessary. If you find yourself thinking your board needs this much please ask someone as it is most likely you have some other setting that is "Off" that is affecting your stability and making you think you need more.
Refresh to Act Delay Or tRFC will have to also be adjusted when using more then 2 X 1GB of Memory. Normally a range between 52 and 62 will be fine for 2 X 2GB of ram, and with some fine tunning you can usually run at 48 or 50. More then 4GB will need more of course, but how much is again up to your Memory, Board and some patient testing.
Memset (LIVE Memory Tweaker and Value Checker)
MemSet is a tweaker which allow to change memory timings under Windows.
You can read principal and secondary timings, and eventually change these timings values. This is useful in checking values you set in the BIOS against what you get in windows, or to see what AUTO is giving you as a setting.
You can change ANY subtimings LIVE within windows and apply it, but do not save or set to run at startup. Make any changes you plan to keep in the BIOS and test them respectively. You cannot change Main timings with this program. And of course, YES you can crash or freeze your system changing values LIVE, if this happens to you do not worry simply shut down your PC and restart it all will be fine
Memset Live Memory Tweaker Homepage
Memset V. 4.0
-Use WinRing0 driver.
-Interface is the same for all chipsets/CPUs.
-Add support for Intel Core i7 CPU (Reading only).
-Loading time was improved.
-Improve frequency reading on Core i7.
-Improved reading SPD info on DDR2 & DDR3.
-Fixe frequency reading on some Core 2 Duo CPU.
Memset V. 4.0 Download
Memtest86+ (Memory Testing)
Memtest86+ - Advanced Memory Diagnostic Tool Download
When doing basic tests on new ram or just for general testing purposes you should let the test run on it's own for a few hours up to 24 if you have the time and don't mind.
When you are tweaking timings and just need some quick answers you can quickly see if your recent changes have made your ram unstable by choosing certain tests. Some say their own set of test #'s to use and they may differ from my own, so if you see someone else suggesting test #'s they that would be fine as well to, it is up to you.
What test #'s I use for basic speed testing to see if recent changes are causing errors quickly are #'s 2 & 5. I run test #2 for about 10 minutes and if I see no errors I will then run test #5 for a hour or so. If no errors are found then your changes are likely ok for the time being. Longer tests will let you know for sure though, but like I said here we are speed testing while doing a little bit of tweaking. If it is going to fail you think and are not so sure let #5 run for a while. It will fail on #5 if it is going to fail.
Below are Some BIOS examples, Sorry for the Resolutions I did not take them myself.
GA-P35 BIOS Example
GA-P45 BIOS Example
To run tests by number, you do this >>>
1. First press C
2. then 1
3. then 3
4. and finally select the test that you want to run
5. press Enter
6. and then 0 to get it running
I mention this because you may often see myself or someone else suggest only running certain tests by #'s at certain points. Which is what I do when fine tunning subtimings, I will run Test #2 and Test #5 for a variable amount of time between changing settings one a a time. After many moves though, please be sure to run some full tests for several hours
On Some Gigabyte Mother boards you will need to use a hotkey to see all BIOS settings. These are either older boards or boards that have not updated BIOS's recently.
The Hotkey is Control + F1 (Ctrl + F1). You will need to push this Hotkey Combination on the MAIN or Front Page of the BIOS, the screen will then very quickly flash. After that you may go into the M.I.T section and ALL hidden settings will be shown. This will also enable hidden settings to be shown in ALL Sections of the BIOS not just the M.I.T. Section.
I would like to thank Merman our fellow board member for him suggesting this thread to me and I hope you all find it to be of at least a little help. If nothing else you will at least have more knowledge now then what you did before about Ram since you took the time to read this over