I thought I would share my experience getting my GA-EX58-UD3R setup with an Intel i7 920 and DDR3 1600MHz triple channel memory. I learned a lot while trying to get this system stable and hopefully this will help someone in the future who runs into the same issues I did.
On initial boot the GA-EX58-UD3R will automatically set your memory to DDR3 1066 at 7-7-7 timings. I have the OCZ low-voltage DDR3 1600 7-7-7-24 @ 1.65v kit:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227381
The main problem I had with stability was when I set my RAM up to its configured DDR3 1600MHz speed. I set the multiplier up to 12x IIRC, putting it at 1600MHz. This automatically set my Uncore up to 3.2GHz. This is fine and you will be able to be perfectly stable at this setting.
The problem for me was caused by the Gigabyte's BIOS auto settings. When I upped the RAM to DDR3 1600 it auto set my i7's QPI voltage all the way up to 1.43 volts. This, for me and my particular memory, was unstable. I was able to get rock solid stable at my memory's advertised specs (7-7-7-24 @ 1.65v) by manually setting the timings and voltage on my RAM to 7-7-7-24 and 1.66 volts (which ends up reading right about 1.65 after boot). I had to manually set my QPI voltage to 1.33 volts. Intel says the max safe QPI voltage is 1.35 (which is conservative, many people are running at 1.4 - 1.45) so this is a safe place for the QPI voltage to be.
I've heard reports that this OCZ memory will run at 7-7-7-24 at just 1.60 volts. I haven't yet been able to do this on the GA-EX58-UD3R but it is probably possible. Just remember to set your QPI at about 0.33 volts lower than your RAM voltage. This for me seemed to be the sweet spot of stability. Be careful to NEVER run your QPI voltage more than 0.5 volts difference from your RAM voltage.
Anyway, it would be interesting to hear other people experiences with the i7 on a Gigabyte motherboard with "overclocked" RAM (the i7 technically only supports up to DDR3 1066). Here are the settings I used to get my system rock-solid stable:
Gigabyte GA-EX58-UD3R motherboard
Intel i7 920 processor
OCZ Low-Voltage Platinum 3x2GB triple channel kit (7-7-7-24 @ 1600Mhz / 1.65v)
1TB Western Digital Caviar Black
eVGA 512MB GTS 250 video card
i7 920 - Default Vcore voltage (1.225?.. it reads at around 1.1 on heavy load)
QPI voltage - 1.335
RAM voltage - 1.66
RAM multiplier - 12x (1600MHz)
'Performance Enhance' setting - Standard
Everything else - default or 'Auto'
Note that with DDR3 1600 and therefore "overclocked" QPI/Uncore my i7 runs VERY hot with the stock cooler. With Gigabyte's phase-switch Dynamic Energy Saver enabled I hit 79 degrees Celsius running Prime95. Without the Engery Saver I hit 86 degrees!!! Of course, in real usage, even very heavy games, I never go over 60 degrees. Still, I will be purchasing an after market cooler eventually, especially before I try to overclock this thing.
I highly recommend the phase-switching Dynamic Energy Saver feature of this board. Use the Dynamic Engery Saver application on the mobo's CD, not the one from Gigabyte's web site which for me didn't have the ability to permanently enabling the Engery Saver on reboot without having to run the app.
Some more thoughts:
My power supply's 12v rail shows up wrong in every app I run besides the EasyTune that comes with the board. SpeedFan and others show my 12v rail at 1-3volts! Imagine how I felt when I first saw that and didn't realize it was reading incorrectly! This happened to me using both of my power supplies so it appears to be an issue with this motherboard and the way Gigabyte is showing the 12v rail.
In conclusion:
If you're running "overclocked" RAM (for example, DDR3 1600) try setting your QPI voltage to 0.33 volts lower than your RAM voltage. If you're at 1.65 volts for your RAM like I am, try setting your QPI voltage at 1.335. Then try moving the QPI voltage down-- you may be able to run it even lower, which is always good. And seriously consider getting an after market heat sink and fan. If you are keeping your QPI/Uncore at its default the stock cooler should be fine.
Use the included phase-switching Dynamic Energy Saver. It will save you on your electric bill and allows you to run 5 degrees cooler, all without the slightest decrease in performance. My case's power LED turns off when I'm on the lowest phase setting (idle). Not sure if this is a feature or not but its nice because I can't see into my case to see the phase LEDs on the motherboard so this tells me when I'm in Dynamic Energy Saver mode and on my lowest phase setting.
The included EasyTune6 software is nice. Set your multipliers and timings in the BIOS and then use EasyTune6 to play with voltages while checking stability. You won't have to restart to make your voltage changes active which is nice.
Now all i need are a couple of SSDs in RAID0 and *everything* will be instant. This machine is so fast that you definitely notice the HDD bottleneck. I'm becoming spoiled to where I get upset any time I do something on the machine that isn't "instant."
I guess that's all for now. I welcome any questions from anyone else having issues or concerns about the GA-EX58-UD3R or running an i7 with DDR3 1600 memory.
Cheers,
Devin
On initial boot the GA-EX58-UD3R will automatically set your memory to DDR3 1066 at 7-7-7 timings. I have the OCZ low-voltage DDR3 1600 7-7-7-24 @ 1.65v kit:
http://www.newegg.com/Product/Product.aspx?Item=N82E16820227381
The main problem I had with stability was when I set my RAM up to its configured DDR3 1600MHz speed. I set the multiplier up to 12x IIRC, putting it at 1600MHz. This automatically set my Uncore up to 3.2GHz. This is fine and you will be able to be perfectly stable at this setting.
The problem for me was caused by the Gigabyte's BIOS auto settings. When I upped the RAM to DDR3 1600 it auto set my i7's QPI voltage all the way up to 1.43 volts. This, for me and my particular memory, was unstable. I was able to get rock solid stable at my memory's advertised specs (7-7-7-24 @ 1.65v) by manually setting the timings and voltage on my RAM to 7-7-7-24 and 1.66 volts (which ends up reading right about 1.65 after boot). I had to manually set my QPI voltage to 1.33 volts. Intel says the max safe QPI voltage is 1.35 (which is conservative, many people are running at 1.4 - 1.45) so this is a safe place for the QPI voltage to be.
I've heard reports that this OCZ memory will run at 7-7-7-24 at just 1.60 volts. I haven't yet been able to do this on the GA-EX58-UD3R but it is probably possible. Just remember to set your QPI at about 0.33 volts lower than your RAM voltage. This for me seemed to be the sweet spot of stability. Be careful to NEVER run your QPI voltage more than 0.5 volts difference from your RAM voltage.
Anyway, it would be interesting to hear other people experiences with the i7 on a Gigabyte motherboard with "overclocked" RAM (the i7 technically only supports up to DDR3 1066). Here are the settings I used to get my system rock-solid stable:
Gigabyte GA-EX58-UD3R motherboard
Intel i7 920 processor
OCZ Low-Voltage Platinum 3x2GB triple channel kit (7-7-7-24 @ 1600Mhz / 1.65v)
1TB Western Digital Caviar Black
eVGA 512MB GTS 250 video card
i7 920 - Default Vcore voltage (1.225?.. it reads at around 1.1 on heavy load)
QPI voltage - 1.335
RAM voltage - 1.66
RAM multiplier - 12x (1600MHz)
'Performance Enhance' setting - Standard
Everything else - default or 'Auto'
Note that with DDR3 1600 and therefore "overclocked" QPI/Uncore my i7 runs VERY hot with the stock cooler. With Gigabyte's phase-switch Dynamic Energy Saver enabled I hit 79 degrees Celsius running Prime95. Without the Engery Saver I hit 86 degrees!!! Of course, in real usage, even very heavy games, I never go over 60 degrees. Still, I will be purchasing an after market cooler eventually, especially before I try to overclock this thing.
I highly recommend the phase-switching Dynamic Energy Saver feature of this board. Use the Dynamic Engery Saver application on the mobo's CD, not the one from Gigabyte's web site which for me didn't have the ability to permanently enabling the Engery Saver on reboot without having to run the app.
Some more thoughts:
My power supply's 12v rail shows up wrong in every app I run besides the EasyTune that comes with the board. SpeedFan and others show my 12v rail at 1-3volts! Imagine how I felt when I first saw that and didn't realize it was reading incorrectly! This happened to me using both of my power supplies so it appears to be an issue with this motherboard and the way Gigabyte is showing the 12v rail.
In conclusion:
If you're running "overclocked" RAM (for example, DDR3 1600) try setting your QPI voltage to 0.33 volts lower than your RAM voltage. If you're at 1.65 volts for your RAM like I am, try setting your QPI voltage at 1.335. Then try moving the QPI voltage down-- you may be able to run it even lower, which is always good. And seriously consider getting an after market heat sink and fan. If you are keeping your QPI/Uncore at its default the stock cooler should be fine.
Use the included phase-switching Dynamic Energy Saver. It will save you on your electric bill and allows you to run 5 degrees cooler, all without the slightest decrease in performance. My case's power LED turns off when I'm on the lowest phase setting (idle). Not sure if this is a feature or not but its nice because I can't see into my case to see the phase LEDs on the motherboard so this tells me when I'm in Dynamic Energy Saver mode and on my lowest phase setting.
The included EasyTune6 software is nice. Set your multipliers and timings in the BIOS and then use EasyTune6 to play with voltages while checking stability. You won't have to restart to make your voltage changes active which is nice.
Now all i need are a couple of SSDs in RAID0 and *everything* will be instant. This machine is so fast that you definitely notice the HDD bottleneck. I'm becoming spoiled to where I get upset any time I do something on the machine that isn't "instant."
I guess that's all for now. I welcome any questions from anyone else having issues or concerns about the GA-EX58-UD3R or running an i7 with DDR3 1600 memory.
Cheers,
Devin