Question about ASUS Motherboard Striker II Formula
This is the whole scenario:
I have been going insane working on my system and have narrowed the
problem to a video-SLI-memory problem.
My system consists of:
EVGA 8800GTS SSC Edition
ASUS Striker II Formula motherboard.
Intel Q6600 Core 2 Quad 2.4GHz processor.
4 x 1GB Corsair Dominator 1066 memory
A 750 watt power supply
And 3 TB of assorted Disc Drives
After installing the new parts in my existing tower, the first problem I encountered was a intermittent PCIe slot (the first one, naturally). I
chose the third PCIe slot, as it was the only other 2.0 slot. Ok,
video's fine now. However, several USB ports are intermittent and don't
want to settle down. But my computer has been down for more than a week since the 4 year old motherboard died, so I limp along for now.
I continued to limp along until the PC just stopped one day. Rebooting
didn't help, as the system would either hang or fail the POST. Resetting
the BIOS on this motherboard was easy, but during the POST I noticed the
CPU was throttled down to half speed, memory was running at only 800
MHz, SLI memory enabling hangs boot and C1E features hang POST.
I replaced (not repaired) the motherboard and I could now use the first
PCIe. USB ports are stable and the CPU is running at full speed. Memory
and SLI features are still not working correctly. I limp along some more
then order a replacement processor. I replaced the CPU and nothing
changed! It was not until I pulled 2 of the memory modules that
everything returned to normal. Bad memory, right? Not that easy I'm
afraid. The SLI problems only occur with all four modules installed.
None of the modules is defective when used in a 2MB configuration. So it
seems that, after 3 months of messing with this nightmare, there is a
problem with the video adapter addressing 4 GB of memory via the SLI bus
(It used to work fine until that one day). I know of no diagnostics that
test this feature to confirm my diagnosis, but the memory passes all the
usual memory test programs and everything works fine at 2GB. This
addressing problem would also explain the problems I have been having
And now.... EVGA's response:
I am not sure if its a problem with the video card. Sounds like a
problem with memory, more specifically the settings/configuration. SLI
ready memory is a feature that is also known as EPP or enhanced
performance profile. What SLI/EPP does is read a profile on the memory
specifically for the 2 stick configuration it was programemd for and
it changes the speed, voltages and timings automatically in BIOS. The
settings are specifically for 2 sticks only there is no such thing as
a SLI/EPP memory 4 stick kit. When you run 4 sticks of memory you run
the kit out of it's specifications and usually have to change the
settings to accomodate. This could include lowering the speed, upping
the voltage or loosening the timings. Usually this is done by calling
the RAM manufacturer and asking for what settings they recommend. The
reason you can achieve higher speeds with two sticks is because the
motherboards have two memory channels, hence the term "dual channel
memory". When you are running 4 sticks of memory you sacrifice speed
for a larger amount of speed. If you have any more questions on SLI
ready memory let us know. Thanks! EVGA Technical Support
Thank you for the detailed response. Prior to my system lockup, I had no
problems using 4 sticks of the DDR-2 memory. However, after the lockup,
I had to reset the BIOS just to get the system to boot without a memory
failure alarm. That's when I noticed that the system was running at only
1.4GHz (instead of 2.4GHz), memory was running at 800 MHz (instead of
1066 MHz), and only with SLI ready memory disabled. A new motherboard
fixed the throttling problems, yet the SLI memory still had to remain
disabled. A new CPU made no difference either.
If the problem is with a voltage setting (as I have seen with nVidea
chipsets before), why the sudden change? The only items I have not yet
changed are the EVGA 8800GTS SSC Edition adapter and the memory. Since
the memory voltage is controlled by the motherboard, the power supply is
not a suspect. I don't know what to do at this point. I just know that
things were better during the first two months of operation then they
James, EPP profiles are disabled in 4 stick configurations as it is not supported by the memory manufacturer as well as our systems.
Well, what does this group of experts think?
The memory you are using WONT work stable with 4 modules inserted on the motherboard.
According to the Qualified Vendors List (QVL) you are only able to run 2 modules stable.
Got the same motherboard and had the same memory modules (4x1GB) and wasn't able to get them stable as well.
By calling Asus they told me 2 modules max would be stable and 4 wouldn't.
And it was .. 2 modules was stable .. and 4 modules was BSOD's, freezes and hungs everytime! 2 modules was also endless Prime95 stable while 4 modules caused BSOD's after 30 minutes ..
Since Vista kinda needs 4gigs of RAM I bought new memory (OCZ XTC SLI 4096MB (2x2GB) PC6400 800Mhz 4-4-4-15) to solve this issue!
Posted on May 04, 2009
The Dominators are high performance memory. They are spec'd for 2.1 volts, so you must set the DRAM voltage in your BIOS to 2.1 volts, not the standard 1.8 JEDEC specification. Also, make sure you set your latency timings to the following:
5=RAS# to CAS# Delay=tRCD
15=RAS# to Activate to Precharge=tRAS
Command Rate 2T
These settings should automatically populate in one of your EPP profiles.
Posted on Mar 04, 2009
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