X58 Pro and i7 920's 21X multiplier lock

Hi, I've read that many motherboards are capable of locking the 920's 21x turbo multiplier so it can be used for overclocking. So far I have been unsuccessful doing so with the X58 Pro. With EIST disabled, I manually selected the 21X multiplier in the bios. Unfortunately Windows still drops the multiplier down to 20x under full load. Is there some bios setting I'm missing or is this board simply not able to lock the turbo multipliers?

Perfectly normal , 920 has multiplier of 20 , under full load that is the max you will get on every board of any brand.
If you use HWmonitor http://www.cpuid.com/hwmonitor.php than you will see that your processor voltage with multiplier 21 max 150W is and if you stress cpu 100% it will drop to 130W that is the max TDP of the cpu. This is the meaning of turbo mode, if your cpu has power left (when you play game or other software because 100% load does not often happen) then the cpu uses this power to overclock one or two cores with one multiplier (21).
Msi made it possible to use turbo without EIST what is not seen often on motherboards because normally you need to use EIST witch is a power feature to use turbo.
If you google overclocking on core i7 you will see that many oc'ers disable this turbo mode because the don't want to use EIST.
I use EIST and turbo and my cpu is overclocked to 4083Mhz and under full load it falls back to 3926Mhz but in games it stays 4130Mhz if needed , but with EIST enabled my cpu falls back to 50% so 2130Mhz when surfing the internet or watching movie even in some games like cal of duty 5 my cpu fall's back to 2130Mhz because the game is not heavy on the cpu and i get constant frame rate off 90 FPS on 1920x1200 all max out.
With crysis the cpu goes to 4130Mhz , so this game uses the cpu more.(not for 100% because then it will fall back to 3926Mhz like when i encode movies to h.264)
I use EIST so my energy consumption is not so high when i don't play games.
But when i need the power turbo will kick in.

Similar Messages

MOVED: X58 Pro and i7 920's 21X multiplier lock

This topic has been moved to Overclockers & Modding Corner.
https://forum-en.msi.com/index.php?topic=129423.0

Perfectly normal , 920 has multiplier of 20 , under full load that is the max you will get on every board of any brand.
If you use HWmonitor http://www.cpuid.com/hwmonitor.php than you will see that your processor voltage with multiplier 21 max 150W is and if you stress cpu 100% it will drop to 130W that is the max TDP of the cpu. This is the meaning of turbo mode, if your cpu has power left (when you play game or other software because 100% load does not often happen) then the cpu uses this power to overclock one or two cores with one multiplier (21).
Msi made it possible to use turbo without EIST what is not seen often on motherboards because normally you need to use EIST witch is a power feature to use turbo.
If you google overclocking on core i7 you will see that many oc'ers disable this turbo mode because the don't want to use EIST.
I use EIST and turbo and my cpu is overclocked to 4083Mhz and under full load it falls back to 3926Mhz but in games it stays 4130Mhz if needed , but with EIST enabled my cpu falls back to 50% so 2130Mhz when surfing the internet or watching movie even in some games like cal of duty 5 my cpu fall's back to 2130Mhz because the game is not heavy on the cpu and i get constant frame rate off 90 FPS on 1920x1200 all max out.
With crysis the cpu goes to 4130Mhz , so this game uses the cpu more.(not for 100% because then it will fall back to 3926Mhz like when i encode movies to h.264)
I use EIST so my energy consumption is not so high when i don't play games.
But when i need the power turbo will kick in.

Building new system, MSI X58 Pro-E, i7 920, GTX 295, 6gb, Thermalright e-120

Hello, I was hoping for some advice on this rig, to overclock or not, etc; Im a bug gamer, so its really about gaming to the max 1st,
Heres the brand new parts;
MSI X58 Pro-E (In the box, just arrived, do not know bios yet)
i7 920
Patriot Extreme Viper PVT36G1600ELK 6GB DDR3 9-9-9-24
eVGA GTX295 1792mb CO-OP edition
Thermalright extreme e-120 cpu cooler (Jesus that thing is huge)
Im going to re-use this stuff:
2x500gb seagate HDD sata raid 0 for performance
Antec 900 case Lots of fans...nice
DVD RW
Corsair TX750W Says 60A on a single +12v rail (I think its good, only @ a year or so old)
SB X-FI Fatality gamer sound card
So, basically should I look to OC this setup a bit? maybe to like 3 GHz or so? If so, whats the "safest" method to OC? I have an excellent cpu cooler and a case that has a ton of fans in it so hopefully I should be good for cooling.
Do I just OC the CPU? Will the memory run at its top speeds with this chip? or do I need to do something for the memory also, I recally for some reason on my current PC with a 780i SLI evga mobo I had to set the ram timins manually, they were never picked up properly on "auto", will I have that also on the MSI board?
I hope Ive provided enough information to get started.
Thank you for any help!
Oh, I plan to build this baby the following weekend as I am working the next 2 weeks straight...meh

Quote from: Rebel230 on 08-July-09, 08:29:48
So, basically should I look to OC this setup a bit? maybe to like 3 GHz or so?
Yes, why not?
Do not be aiming for 3 GHz, you can run that on stock voltage. 4 GHz is more within the grasp of the TRUE 120.
Quote from: Rebel230 on 08-July-09, 08:29:48
If so, whats the "safest" method to OC? I have an excellent cpu cooler and a case that has a ton of fans in it so hopefully I should be good for cooling.
There's only one way to overclock - overclock... There is no safe way of doing it...
Quote from: Rebel230 on 08-July-09, 08:29:48
Do I just OC the CPU? Will the memory run at its top speeds with this chip? or do I need to do something for the memory also,
The only way you can overclock a CPU without overclocking anything else is with an extreme edition CPU. (The i7 965, for example.) It's overclocked by raising the CPU multiplier, not the baseclock frequency.
With regular CPUs, you overclock the baseclock, which overclocks the CPU core, CPU uncore, memory, and QPI frequency.
Quote from: Rebel230 on 08-July-09, 08:29:48
I recally for some reason on my current PC with a 780i SLI evga mobo I had to set the ram timins manually, they were never picked up properly on "auto", will I have that also on the MSI board?
Extremely doubtful.
I hope I've answered your questions. I can be more thorough if you wish to know more. Of course, Google can tell you more than I ever could.

MSI x58 ProE and Corsair 12GB (3x4GB) RAM Issues

Greetings!
New poster here with a question that I cannot seem to find an answer to anywhere. I've looked over the forums but have had no luck figuring it out. My goal is to identify the culprit and replace the appropriate parts.
I built this computer in 2009 with the intention of doing OpenCL/CUDA computing and handle all my multimedia. At the time, 6GB DDR3 RAM (3x2GB) was about all I could afford. The machine works great, but lately, attempting to do some video and image processing has been hitting limits on my available RAM. I also want to run a linux VM or two. I thought I would order the Corsair 3x4GB DDR3 kit from NewEgg and not have any problems upgrading. I didn't have any plans of running the 6 and 12 GB sets simultaneously because I thought there would be some sort of memory density/timing issues.
New RAM desired: Corsair Dominator with DHX Pro Connector and Airflow II Fan - DDR3 Memory Kit (CMP12GX3M3A1600C9)
Old RAM in system: Corsair Dominator with DHX Pro Connector - 6GB Triple Channel (CMP6GX3M3A1600C8)
Request 1: Can I mix the 6 and 12 GB sets (for a total of 18GB) if I keep the density the same across each set of slots? There are 3 black (primary) and 3 blue (secondary). I was thinking of putting the 12GB in black, and 6GB in Blue.
I placed the order, received it, and went to install it yesterday. Took the existing 6GB out and dropped the 12GB in, saw that BIOS recogized it with the right timings, and proceeded to boot Windows up. Blue-screen at the very first Windows logo. I thought "well that stinks, let's check to see if the RAM is defective through MemTest." Downloaded an ISO of 4.2, fired it up, and it hung right away. Hung in the "Address Test, Own Address" test. Big fat A note: BIOS and MemTest both recognized the full capacity of the sticks.
My next thought was "Well, one of them might be bad, let's try to find out which one." I individually put each one in the first slot on the board, ran MemTest, and showed 0 problems on any tests with each of them.
Summary thus far: Individually, each 4GB stick works perfectly. In combination, they fail. The full 3x2GB set works perfectly.
My next theory was that my board might be bad (even though the 3x2GB set in the same slots has no issues). Knowing that the first slot was good with every bit of memory I put in there, I left a 4GB stick in slot 1, and dropped a 4GB stick in slot 2. MemTest hung again. Thinking it might have been that one stick, I put the other one in there, and it hung also. So, slot 2 looks suspect. Move the sticks to 1&3, and they look fine, but that still leaves me missing 4GB of RAM.
I've followed advice and re-seated the CPU, looked for bent pins (none found), and tried manually setting the timings to the 9-9-9-24 that is printed on the sticks. No luck with any of that.
Request 2: So, my question to you is what am I missing? I feel like the board is the problem, due to the slot 2 problem with the 4GB sticks. However, my 2GB sticks don't have any problems at all in the same slots. Could the 4GB sticks require a little more power that my board might not be pushing out (the board is labeled at 1.5V, the sticks are labeled 9-9-9-24, 1.65V)? Would a bent pin be causing this that my eyes just cannot see? I read somewhere that a guy had a pin that was 0.25mm off that was causing his problems.
Or should I be looking at the memory? The 3x2GB set works fine, but the 3x4GB does not.
I'm not sure what my next step should be other than replace the RAM first, motherboard second. The RAM I just got, so I could RMA it if I knew exactly what the problem was. The motherboard is approaching 3 years old and presumably is out of warranty. I wouldn't mind replacing it, but I don't want to spend money right now if I don't have to.
I don't have a second machine to test on, although I'm trying to locate one (most of my friends don't build custom PCs). I have also tried putting the 6GB in the black slots and 12GB in the blue, but the machine doesn't work with that configuration either.
Request 3: Could someone explain how I could aim for 1066MHz on my RAM? I read that on the X58 Pro-E that this resolves most problems with random bluescreens. When I try to do this, I get lost in the numbers/options within the BIOS.
Anything else I might be missing? I'm out of ideas
Thank you all so much for the help!

Hi and welcome,
You have 2 "bottlenecks": the processor and the mainboard.
http://ark.intel.com/products/37147/Intel-Core-i7-920-Processor-8M-Cache-2_66-GHz-4_80-GTs-Intel-QPI
Max Memory Size (dependent on memory type) : 24 GB
Memory Types : DDR3-800/1066
Memory Channels : 3
Max Memory Bandwidth : 25.6 GB/s
http://www.msi.com/product/mb/X58-Pro-E.html#/?div=Detail
• Supports six unbuffered DIMM of 1.5 Volt DDR3 800/1066/1333*/1600* (OC) DRAM, 24GB Max
As you can see, above 1066MHz you need to overclock both the processor and the mainboard.
I think for your config the best shot is 3 x 4GB DDR3-1333 (9-9-9-24 at 1.55-1.60V)

Freezing up with x58 Pro and G.Skill DDR3-1600 RAM

I just recently updated to BIOS version 7.1. When I tried to use the "Extreme Memory Profile" or XMP in order to have the mainboard recognize the RAM at it's rated speed, my system became unstable and quickly freezes after boot up. I have G.Skill DDR3-1500 PC3-12800 (CL9-9-9-24) RAM, Core i7 920, MSI x58 Pro. The only setting that recognizes my memory and allows my computer to run with stability is when the RAM is "underclocked" to 1333Mhz. Any tips on how I can get the mainboard to run my memory at it's rated 1600Mhz speed without my computer crashing? Any advice would be greatly appreciated!

Hi panetrez & welcome to the forum. Welcome to the world of 'rated' but in reality slower chipped memory modules. In many tests, RAM at 1066 against RAM at 1333, or even 1600, was only around 1-2 FPS different. System performance I believe, gets it's biggest boost from CPU speed & the quality of the VGA card.
The 'sticky' on initial 1066 memory speed is correct with Eclipse & Platinum, but the X58 Pro, if 1333 or higher rated memory is installed, does set the RAM at 1333. This was proven on two recent builds I was involved with. One had 1333, & the other 1600, & both ran at 1333 at boot-up. Both of them also initiated with 6.4GT.
If you would still like to run your RAM at 1600. Start a new thread in the 'Overclocking & Modders Corner' of the forum. Some adjustments in the bios will be required.

X58 pro and x5650

Hi
Seeing how these xeon chips are now cheap as chips I decided to get one for my now ancient x58 pro. Some hexacore goodness. After running some benches I cant help smile at a 60 quid chip in my old 2009 board can still do some good results. But anyways.
It works I can overclock it and its cooler than my old 920 but In bios settings the uncore ratio is totally blacked out. The motherboard just keeps it at a x2 ratio with memory and I have no way to change it. It recommended that's its kept at a 1.5 unlike the normal x2 for the i7s.
Is it a quirk with this board\chip or do I have to change a option in bios so it becomes available? I got the latest bios btw, any help would be appreciated.
Thanks

yes its 8.f. All other options work and this chip is more than happy running even overclocked. Its that uncore is a big part of the oc and was wondering what/if can be done about it.
Saying that many boards listed the gulftowns and a few xeons then stopped updating there chips on the support pages. Not many x58 boards that don't support these chips. My pro does but its a shame it might be bugged so I cant get the most out of it.

MSI x58 Pro and Quad SLI

OK I am new to this forum first off. So hey! lol. Now maybe this has been discussed.... well im sure it might have been but I thought I would get a direct answer from somebody. I have the Msi x58 Pro mobo and I planning to run QUAD SLI with GTX 295's. Now my BIOS version is the oldest.... I think 7.0 which doesnt support SLI right? and I have read that MSI motherboards now supports SLI. WIll this configuration work and should I update my BIOS to the most current version??

Yes, update with the 8 series bios. That will enable SLI. Please, be sure to use the forum USB Flash Tool for the bios update.

X58 Pro and esata - Won't work...

I am just beyond frustrated with esata now! Wouldn't work on my last board (Asus P5K-Deluxe) and now it won't work with my latest build on the X58 Pro.
I tried to connect my Thermaltake BlacX external storage device via esata today and nothing happened when it was connected. I tried two different cables, one brand new one and one that has the corners 'shaved'.
I got ticked off tonight and bought a Lacie D2 Quadra 1TB external drive with esata. No go for this as well. Both the Thermaltake and Lacie work via USB2 no problem but USB2 just isn't fast enough.
I have made sure the Extra RAID/IDE Controller was Enabled in the BIOS (which it was)...
Aanyone have any suggestions?

Sometimes it is that easy. That's why I asked about the OS you had. Some component recognition issues tend to arise from time to time with different versions. Drivers are another fun element in the mix as well. If it stops showing again, looks like a 'reboot' will fix it. As an afterthought, it may have something to do with the 'connect' sequence. Now & then if I forget (can relate to age), & leave a portable device connected after shutdown, at bootup, the boot sequence is all messed up. Anyway, glad it is working now.

X58 Pro and memory compatibility

Is the X58 Pro compatible with Super Talent P/N: W1333UB2G8 (Super Talent 6GB (3 x 2GB) 240-Pin DDR3 1333 (PC3 10666) memory modules?
The MSI web site lists Super Talent P/N: W1333UB1GQ (PC10600 DDR III RAM (DDR-1333) modules as compatible. Can I assume the above modules will also be compatible?
These modules were supposedly matched with the X58 Pro in a bare-bones bundle, but I don't see these modules on MSI's memory list.
Any feedback would be greatly appreciated

Hi sighlentz, & welcome to the forum. It is always a gamble using mem. modules not on the MSI support list. The list does change & get updated from time to time, as new modules are tested. I've used modules not on the list on 4 Pro builds without any major problems. By the PC3 10666 & 10600, both sets of those modules you've listed are most likely 1066 chipped 1333 rated. Since the i7 Integral Mem. Controller only natively supports 800/1066 mem. speeds, most memory stability issues can be resolved by starting out with 1066 settings & working up from there. Mem. Ratio 4, Uncore Ratio 8, XMP & Spread Spectrum both disabled.

MOVED: MSI X58 pro and core i7 920 c0 overclocking help

This topic has been moved to Overclockers & Modding Corner.
https://forum-en.msi.com/index.php?topic=131631.0

When your time permits, list 'all' your systems components, OS etc., including PSU +12V amps on the rail(s).
Quote
cannot even get it to post at 3.6ghz with manual voltage increases in all things, and auto doesnt help, is this normal?
Yes, when it isn't necessary to do "increases in all things".
Quote
Im not very confident with doing the ioh mod but im getting 90 degrees with no overclock
The addition of a fan to direct air flow at the IOH, will reduce the temp. The Antec Spot Cool works well for this. Aftermarket CPU coolers have taken away the engineered passive air flow the stock cooler provides (presuming you are not using the stock cooler). 90c is in spec, so RMA solely upon that is doubtful. Again, when time permits, include what OC goals you are looking for as well. Most OC'ing takes time, patience, & trial & error.

X58 Pro and Raid 0, I would like some help if possible.

Hi,
I'm currently waiting on my SSD's that I want to use in a raid 0 configuration, but I'm a complete newbie when it comes to running raid on these things.
Currently I have HDD's and DVD on SATA contact 1, 2 and 3.
My BIOS version is 7.3.
I'm planning on installing Windows 7 64-bit on the Raid 0 configuration.
Can someone give me a step by step instruction on how to setup a Raid 0 with 2x SSD?
I would be very thankful for any help.

Quote
Registry tweak for what?
Error message when you start a Windows 7 or Windows Vista-based computer after you change the SATA mode of the boot drive: "STOP 0x0000007B INACCESSABLE_BOOT_DEVICE"
This >> registry tweak << is required if you install Windows without setting the RAID mode to ACHI first as follows:
This issue occurs if the disk driver (MSACHI) in Windows 7 and Windows Vista is disabled. This driver must be enabled before you change the SATA/RAID mode of the boot drive.To resolve this issue, enable the AHCI driver in the registry before you change the SATA mode of the boot drive. To do this, follow these steps:
Start REGEDIT.
Locate and then click one of the following registry subkeys:
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\Msahci
HKEY_LOCAL_MACHINE\System\CurrentControlSet\Services\IastorV
In the right pane, right-click Start in the Name column, and then click Modify.
In the Value data box, type 0, and then click OK.
On the File menu, click Exit to close Registry Editor.
Reboot and load the BIOS.
Change the RAID value to ACHI.
Finally, reboot.
Quote
I got a reply from MSI support to use RAID option in BIOS and Windows 7 installed without any problems.
Sorry I went off on a tangent, I failed to remember that you are installing this for RAID, if you were using the SSD's in non-RAID mode, you'd use ACHI.

Dipping my toe in: MSI X58 Pro and OCZ Platinum memory

I have been suffering (like a few I've read about here) with random crashes and such.
After doing some research and reading different fora I have come to the conclusion that I need to tweak some settings. Only thing is I am totally scared of frying my new machine.
I have downloaded the following: CPU-Z, Memtest 4.0 (by HCI Design), Memtest86+
My specs are in the signature as required.
Walk me through (please!) what you need me to do. If there is a general FAQ (I haven't poked around here too much, just reading some threads), point me to that and I'll be back for assistance
Thank you in advance for your time.

Quote
Still from CELL MENU:
Changed Memory Ratio from AUTO to 6
This change makes ADJ DRAM RATIO to 1600
Also changed DRAM VOLTAGE to 1.60
Is that stable or is it not?
Please download this tool and make some screenshot that show the current timings & sub-timings as well as the SPD Profiles:
http://www.tweakers.fr/download/CPU-Tweaker13b3.zip

Help with Overclocking my i7 920 on X58 Pro-E

Can someone please give me some step by step instructions on how to overclock my i7 920 on my X58 Pro-e board? I have the following specs- X58 Pro-E, i7 920 co stepping, H50 hydro cooler, 6 gigs Corsair 9-9-9-24 1600, GTX460-SE 1Gig, OCZ Stealthxstream 600 watt, 1 tb Western Digital, running Vista home Premium 64 bit.
I have been able to get it to 3.6 but after that I have problems with the memory I think. But I think it should be able to do much better if the voltage and or timings were set correctly.
So if you guys can walk me through it that would be great. Thanks John

Dear John,
Your initial posting did not contain any information as to what you had tried to achieve in terms of Overclocking your system, neither does it indicate that you had made any attempts at trying to gather information in terms of general OC'ing for the i7/X58 platform. These are normal processes one would go through before having an expectation of someone dishing out a "magic formula" that will give you what you want in terms of an OC. OC'ing a system must start with a reason for wanting to do so. i.e. faster gaming, higher theoretical benchmarks, improved video rendering times, increased folding performance, experimentation or just plain an ego trip and being able to post a nice number somewhere.
Your reasons of wanting to do a higher OC are unknown and quite frankly have got nothing to do with us. You decided on a Sunday to do some OC'ing and it seems after some frustrating time, gave up and came to the forum. Now being a weekend, and this forum being monitored by users just like you, most forum users were probably having their Sunday BBQ and relaxing,oblivious to the fact you were out there crying for help. Some people actually do have other things to do than just sit in front of the PC to wait for someone like you.
Anyhow, come Monday, people are off to work and will probably have some spare time during or after work to see if they can be of assistance with users posing specific questions regarding their rig combinations and the exact detail of what has been done to get around the problems.
Your patience was obviously tested by that time and you start your next post with a "not so nice" set of assumptions and statements.Quote
Well it looks like no one wants to help or can't!
Quote
I think I will just sell my MSI board and buy a Gigabyte or Asus as they seem to have a much better forum with people that have the seem boards and are willing to Help!
Quote
Last MSI product that I will buy.
This put some questions in my mind regarding your homework in terms of your decision to acquire the combo you did. Was it a spur of the moment decision or was some research conducted in terms of the hardware selection based on comparing reviews and visiting the forums beforehand to establish if the intended hardware does actually satisfy the targeted/expected outcome.
The first thing you do is to threaten other users of MSI products that you will sell your board to buy something else.
A bit of searching on the net regarding general OC'ing would have given you enough information to establish the basics. Once those don't work out for you, then the time comes to state those and request assistance.
If you search this forum you will find hundreds of threads where the best advice in the world has been provided because the person wanting assistance has provided a bit more detail than you have, with a clear indication that they actually did do some effort in terms of research.
In order to assist you, perhaps you could start anew by providing your current BIOS settings and posting screenshots of your CPU-Z memory and SPD tabs. That's always a good place to start. You may be surprised at the amount of advice forthcoming when people can see the whole picture...

X58 Pro not POSTing correctly

Hi,
My new install X58 Pro system powers up OK, all fans running, DVD and HDs spinning up but I get no video output and the machine powers back to standby after about 2-3 minutes.
A couple of noob questions:
- For a single video card which PCI-Express should I use (I'm using PCI_E2 - i.e. top X16 one)?
- Is there a list of any POST codes (beeps etc.) and/or can an Post LED be added (like on the X58 Eclipse)?
I have tried reseating the RAM (using the black slots), tried with just one stick in A0 and disconnected all but CPU, Keyboard and fans. Same problem each time - 2-3 minutes of activity without video and then auto-shuts down to standby mode (yellow power light).
All power connectors on board are being used (8 pin and 24 pin).
I will try removing the board from the case this evening and running on a cardboard box instead.
Any ideas or suggestions?
System details are:
Antec P-180 Case (3X Case Fan)
OCZ - 750W PSU (Can't remember model but a recent expensive one - $100)
X58 Pro
Core i7 920
OCA Gold 6Gb 3 * 2Gb DDR3 1600
Noctua NH-U12P CPU Cooler + 120mm Fan
eVGA GeForce 8800GTS card

Hi JustBGood, & welcome to the forum. I didn't see any beep codes in the manual, just the LED Status Indicator section on pages 2-27 & 2-28. The X58 Pro doesn't have the pinheader for attaching the D-LED2. With just one mem. stick in slot A0 (black), & CMOS cleared (with power cord removed), set XMP disabled, Spread Spectrum disabled, Mem. Ratio to 4, Uncore to 8, & retest for boot. Yes, use the PCI-E slot closest to the CPU (PCI_E2) for your graphics card.

[RESOLVED] X58 Pro random reboots

I'm getting random reboots, sometimes every other day, sometimes several times a day; doesn't seem to have anything to do with what I'm working on.
I upgraded power supply thinking that might be it (430 to 650 watts), but still happening.
Support suggests upgrading bios from 7.1 to 7.3 but I'm wondering if I should check other stuff 1st?
Also concerned about losing my data because I have Raid 1 and allegedly upgrading the bios will cause me to reconfigure raid and possibly lose all data.
(I have a full backup but would rather not go that route if I don't have to).
X58 Pro
Core i7 920
Corsair xms3 DDR3 3 x 2GB (slots 1, 3, 5)
EVGA GeForce 9600 GSO 512
2 WD 640GB drives (raid 1)
LG DVD/RW
Sony usb card reader
Antec Earthwatts 650
Windows 7 RC-1 64 bit
(haven't changed any bios/cmos settings, no overclocking)
Successfully ran intel burn test.

The system just reboots, no screen errors.
I just looked in the event log and there are multiple warnings prior to the death spiral, mostly in the 500 range.
For example,
The Desktop Window Manager is experiencing heavy resource contention.
Reason   :   Graphics subsystem resources are over-utilized.
Diagnosis   :   A sharp degradation in Desktop Window Manager responsiveness was observed.
then,
The Desktop Window Manager is experiencing heavy resource contention.
Scenario   :   The Desktop Window Manager responsiveness has degraded.
and then,
The Desktop Window Manager is experiencing heavy resource contention.
Reason   :   Graphics subsystem resources are over-utilized.
Diagnosis   :   A consistent degradation in frame rate for the Desktop Window Manager was observed over a period of time.
There were 1/2 dozen of these warnings and then critical (where it rebooted).

X58 Pro and i7 920's 21X multiplier lock

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