Hit a wall at 240fsb

[disk11]

Specs in sig, running a trat d24 BIOS and the filename has v2 in it, and using Nvidia 4.24 chipset drivers.

Highest stable overclock shown in CPUz screenie that run 10+ hours in memtest86+ with no errors. 2.9 vdimm (3v actual), 1.7 chipset, all else stock.

When I jumped to 245 with the timings shown, I got blue screens with stop errors and suposdly missing files preventing Windows from booting that. Upping the timings to 3-4-4-11 saw services.exe terminating over multiple reboots. Going back to timings in the CPUz screenie and 242 fsb I got a random restarts during web browsing.

Since I have an ulocked CPU and the multi is set to 5 throughout all this testing, I'm pretty sure I have either maxed the system out as is or some other issue is occuring. My question is which mod/s etc. should I look into push this system farther?

 

[Jklipper]

Your best bet would be to do a Vdimm mod if you think your memory can handle more volts. It would be nice to have a little tighter timings but 240 ain't bad for 2.9v. You might get 1 or 2fsb by heatsinking the mosfets, i did. Here's a link to some mods you could try.
http://www.motherboardfaqs.com/content.php?content.15

 

[HousERaT]

Your best bet would be to do a Vdimm mod if you think your memory can handle more volts. It would be nice to have a little tighter timings but 240 ain't bad for 2.9v. You might get 1 or 2fsb by heatsinking the mosfets, i did. Here's a link to some mods you could try.
http://www.motherboardfaqs.com/content.php?content.15

Hey.... nice link.... I was looking for something with all this stuff in the same place.

 

[Jklipper]

I've been waiting for 3 weeks now for a few variable resistors to come in the mail so i can try the v-dimm mod. Have a fealing they are stuck at customs so they can charge me tax on a few dollars

 

[disk11]

If I do the vdimm mod, I probably should add a fan right? Gotta do research on acrlic (sp) cutting, as I don't like the 40mm you can mount on the memory clips.

Could it be the southbridge is overheating most of the errors have to do with the hard drive?

 

[disk11]

Bumpage, updated sig, bought a Vantec copper Iceburg and added the larger passive heatsink to the southbridge, and changed to Merlin's CPC on rev2 d25 BIOS and still stuck @ 235 All of the blue screens whine about files.

If you have any ideas, tell me and explain why it would help.

 

[mcoleg]

try a cpc-off bios. also, i noticed that with some merlin's bioses 3-4-4-8 is more stable that 3-4-4-11.

 

[disk11]

I got Merlin's 2.0.0C 01.08.2004 cpc off 3.19bpl D25 and 3-4-4-8 timings stable at 240, but that doesn't seem right since I could do 3-2-2-11 @ 235 24/7 stable. I think it's vdimm=vio mod time

 

[enduro]

What you can also do is run memtest with your cpu mult. way down (5) and your ram timings disgustingly loose (3-5-5-11) or something like that, then run memtest at your max overclock. If it still fails memtest, then it should be your board that is maxed out since memtest tests cpu, memory, and chipset and if it is your board, then you need more vdd. Lapping the NB and doing a vdd mod might help you out.
Here's a thread you might look at. You could always ask the guys in there some questions about vdd as well, given the 2V vdd that they have run.
VDD

 

[disk11]

I'll give it a shot on the memtest thing.

I'm also switching to d10 beta4 to see if that helps per sentinal's request.

I just replaced the NB cooler with a copper Iceburg and the NB seemed pretty level to me, but I'll check it when I do the vdimm mod.

 

[enduro]

What BIOS where you running before? Running a D2x BIOS on a board that doesn't like it can really drop your overclock. Running Beta4 Turbo really helped me hit a nice overclock. The D10 4x4 didn't work as well, it seemed less stable to me for some reason.

 

[disk11]

At first it was a trat d24, I think a cpc off one, then the Merlin d25 cpc on rev 2d, and now the one I listed in post #8.

I really think I'm dragging a dead horse up a hill since Sentinal couldn't get his mT -5b c chips over 240, I have mT -5b a chips @ 235, and I've seen no one on a K7 platform do much better than 240 with mT chips. But I imagine its better than my 2 512 MB DS Infineon chips even if I use a quality cpc off BIOS

 

[enduro]

Still, for pc2700. That's a pretty impressive fsb. My pc2700 Hynix went to 235 stabily, so with your vdimm and timings, that is pretty good. I ran my Hynix at 3-4-4-11 at 3V to get the 235.

 

[disk11]

I must agree, and with -a chips too. I check the chips for the heck of it one day and saw those IC numbers, I was very shocked.

I'll try a couple d10 beta4s I have later tonite, and maybe do some volt modding later in the week.

 

[disk11]

*$&^% I can't flash any d10 BIOS I get my hands on, it says I have my jumper set to prevent any writing to the BIOS chip, which doesn't exisit when I flashed to any d34 or d25 BIOS.

 

[Jess1313]

Have you tryed winflash?

 

[disk11]

Using winflash worked, but the I couldn't even post at 240 using 3-4-4-11 using d10 beta rev4. I'm flashing to another.

I think its mod time

 

[enduro]

I've started a EB support thread. You might check that out disk11, since you have micron chips as well, some of the info might help you. you never know. Since you are struggling to reach 240 as well, maybe you can add some stuff to our search. I've found some interesting things with the NF7, the more you research this board, the more you love it. There's always something to keep you looking for that last Mhz.

 

[disk11]

Sounds like a plan to me. Check your thread.