8RDA/+ chipset mod?

:thumbsup: :fart:












:slap: :slap:

heheh

I've done the VDD mod on my board now too. Adds to my MOSFET heatsink mod, SB heatsink mod, Shin Etsu paste between NB and NB HSF(Stock heatsink and 80mm 3000rpm fan).

1 1kohm fixed resistor and I now get 1.77~ VDD. PERFECT!

Just gonna leave things for a few days though and let it all burn in.

Then I'll see how high I can take my TwinMOS PC3200 and XP 1700+.

I'm aiming for atleast 200MHZ FSB SYNCH with RAM and about 2.2GHz on my 1700+.


Thanks for the mod details everyone!

Quote:

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Originally posted by Walrusbonzo
I've done the VDD mod on my board now too. Adds to my MOSFET heatsink mod, SB heatsink mod, Shin Etsu paste between NB and NB HSF(Stock heatsink and 80mm 3000rpm fan).

1 1kohm fixed resistor and I now get 1.77~ VDD. PERFECT!

Just gonna leave things for a few days though and let it all burn in.

Then I'll see how high I can take my TwinMOS PC3200 and XP 1700+.

I'm aiming for atleast 200MHZ FSB SYNCH with RAM and about 2.2GHz on my 1700+.


Thanks for the mod details everyone!

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If that twinmoss has winbond BH-5 chips, 1.77Vdd should bring you up to 220~225mhz sync. :)

No it has "TwinMOS" chips on the PCB, they are one sided PCBs.

One things for sure, this RAM will just NOT do Ras to Cas(RCD) of 2 when the FSB is 166MHz or higher, regardless of VRAM.

I can set TRAS to various values ok, CAS at 2 is fine, and RAS Precharge(RP) is fine at 2 also.......


Anyway....

Using CAS-2, RP-2, RCD-3 and TRAS-7 I was able to run memtest86 fine at 220MHz FSB synch with RAM.

Hopefully it'll be stable in Windows when I try on Wednesday.

Well, short question :)

Which resistor do you guys recommend for me? I'm cooling the NB with a zalman passive nb cooler + 90mm fan blowing over it..

I'm currently stuck at 175 fsb! Any higer and 3dmark gives an error like this:

Timer sanity check failed (ben: 24.900000, sys: 24.900000).

Wtf... I've never seen this error :(

Hopefully the mod will give me some more headroom

750ohm is fairly safe.

175 seems a bit low to be needing more VDD, you might have a memory or setup problem.

I know.. the thing can boot and run prime for hours on 190 fsb.. but I keep getting the 3dmark errors.. Oh well... going to reinstall and hopefully it wil be fixed

Btw.. did you guys experience any weird screen flashes at higher fsb's? The screen turns black and 1 sec later it's returns :S

yea mine flashes black right before i get to the desktop in win2000.but i am running 225fsb dual bank @3.05vdimm
2 hyperx 256mg pc3500 matched sticks

That's prob. because you overclocked your vga card with some proggie.. mine does it all the time!

i am still on old video card no overclocking yet on mine.i am getting the board up first.find the best setting for memory and cpu and .then i will put in my r9700 running @470/750.
screen flashing doesnt bother me seams ok.i will try to run prime for a few hours to see how it does.

Ok, I'm gonna vmod the thing this tonight.. gonna try a 750 ohm resistor like Holst said.. hope it works :)

Woej, succes! I used the 755ohm resistor and now I have 1.8v vdd :)

I can run @ 200fsbx10 now :banana:

Thanks for the great info in this thread!
I was stuck at 191fsb,
but after the mod I am now at 207fsb stable!
I bumped the Vdd up to 1.85.
Now all is good even at aggressive ram settings and in Dual Channel mode.

THANKS AGAIN.

Quote:

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Originally posted by gb5766
Thanks for the great info in this thread!
I was stuck at 191fsb,
but after the mod I am now at 207fsb stable!
I bumped the Vdd up to 1.85.
Now all is good even at aggressive ram settings and in Dual Channel mode.

THANKS AGAIN.

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Lets see your bandwidth and 3d2001 now. I am real curious because I am contemplating an Asus N2 board over this. You might convert me since this board is easier to do the chipset mod than the Asus.

here is a quick 3dmark: http://service.futuremark.com/compare?2k1=5731371

I had about 14900 before the mod.
I ran at 11.5 X 191 before.
Now 10.5 X 208.

http://www.3-kids.com/2083d.JPG

Nice score on the 3D2001! Memory bandwidth is comparable to the Asus. Thanks for the quick reply....:)

yea these boards fly.what do you think?fast enough no extra cooling

I see 225 FSB in CPUID but is that the same FSB for Sandra?

What FSB and how long did you run Prime 95?

yes that is one of my test runs.cpu isnt running hard.i was just testing my memory and my mods to the board
fsb was running 225 dual bank memory.timming was set to 7 2 2 2

How long have you run Prime 95 at 225 FSB?

ran prime for 3 hours or so.
but wont complete 3d2001 at that speed.yettt.will complete 3d at 220fsb but i am working on moving it at this very moment into my phase change test unit.where i will be able to cool the chipset better than air. need.more volts to the chipset and i cool it properly with high volts there.needs 1.9 or better i think .

I dont thing pushing past 1.9 is healthy.. seems a few people have lost boards to 2.0v.. kinda like the instant northwood death thing.. 8-/

as far as i know, only 1 person (richbastard) killed his board by turning the pot too fast.
other people reported running 2.0V without any problem (so long as you keep it cool). One more to consider, when you run at 2.0V, you should consider adding more capacitors and replacing a tiny coil with a bigger iductor coil.

This mod definately worked for me but I seem to have one problem...my video artifacts past 205. I have tried a VDD or 1.77 and 1.85 but that didnt solve the problem. Doing the VDD mod did however take away the screen flashes past 200fsb. I tried changing the AGP voltage and everything else I could think of. It doesnt do it at all if i dont run dual DDR mode. Any ideas?