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E7200 BSEL mod repeated BSOD

post #1 of 6
Thread Starter 
This is on an Intel DG35EC, nice mobo (for the price - free), although no BIOS OC (and I couldn't find the PLL on the board so no softmodding for now - I'll pull it all apart and look for it later). I did the BSEL mod for 1066->1333 and as you can see from the screenshot, it works. The problem is, after temps hit about 63C, it BSODs (takes about 10min). RAM's been tested and all other components are known-good.

My guess is it's due to the absurdly low voltage (0.928 seems *very* low to me for that speed). The other possible (but less likely) culprit is the CPU fan, which does not seem to exceed ~1000RPM, regardless of conditions (there is no manual option for fan control in the BIOS). What do you guys think, and what are some things I could try to stabilize this?

Thanks!

EDIT: Did some research and these temps seem quite high; I'm using the older stock Intel 775 cooler (for Pentium Ds - it's pretty big, with a copper base). I tried prime95 and the program crashes within minutes, even seconds. Firefox crashes every now and then too, this behaviour is very similar to what I experienced when I did undervolting on laptops.

EDIT2: Coretemp reports VID 1.2125 under load.
Edited by lolica - 2/10/11 at 10:56am
post #2 of 6
Timps aren't high enough to let it BSOD every time. There could be a few possibilities. Maybe the mobo doesn't support 1333 FSB that well or you should try to volt mod it.
     
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CPUMotherboardGraphicsRAM
intel i5 3570k Asus P8P67 Pro (Rev. 3.1) Asus GTX 970 2 x 4GB DDR3 Samsung 
Hard DriveHard DriveHard DriveMonitor
Samsung EVO 250GB WD Green 1.5TB WD Red 1.5TB Dell 24'' IPS 
MonitorAudio
Panasonic Viera ST50 Plasma IMF bookshelf speakers + Luxman receiver 
CPUMotherboardGraphicsRAM
i5 750 Gigabyte P55 USB3 HD 4850 then 5870 then 7950 then HD 6970 2 x 4GB DDR3 Samsung 
Hard DriveCoolingOSMonitor
Intel Postville 80GB SSD, 2 x 1.5TB WD. Thermalright Windows 7 Samsung 2494HM then Dell 24'' IPS and Panasonic... 
PowerCaseAudio
Nexus R3 5000 530Watt Bitfenix Logitech Z-5500, later IMF bookshelf speakers +... 
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post #3 of 6
might as well buy a budget board..
try looking in to the g31/g41 boards
post #4 of 6
Thread Starter 
I successfully VID modded the processor to give me an extra 0.1v. From 0.928, I've gone to anywhere between 1.008-1.024v (board seems to adjust it - this is with CPU-Z, as CoreTemp still reports 1.2125v). Core doesn't exceed 64-65C and it's stable. Gonna run OCCT for 2 hours and see what happens.

I've attached a pic of what pins I connected and shielded, as well as the chart I used to determine them (the latter is linked in other places on here, but I've attached it for convenience).

EDIT: OCCT Linpack 2hr passed with flying colours. Max temp hit was 70, hovered around 68 most of the time. Stable overclock achieved =)

NOTE: for anyone else doing the voltage mod on this proc, you'll see a voltage of 0.976 in CPU-Z with Speedstep on (at 6.0x), and anywhere between 1.008 and 1.024v under load. If you're seeing 0.928 under load, your mod didn't work.

NOTE2: The Intel fan is indeed capable of higher RPMs - it went up to 2550.
Edited by lolica - 2/11/11 at 12:05pm
post #5 of 6
Question the pic you posted to show which pins to isolate and which to ground is that actually a e7200 because i have the same issue however the pic shows a ton of resistors and transistors on the bottom yet mine has almost none of those parts at all. just curious.

edit also im cheap and found really tiny pieces of aliminum foil very carefully cut with exacto shears works awesome! then i glue it to the cpu with a tiny drop of nail polish
Edited by tommyb13662 - 8/18/13 at 8:53pm
post #6 of 6
Also are those the same pins for a vmod to an e7500 which i also have?
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