Haha, it's my GC timings, I forgot to mention that

As for my computer RAMs, I shoved 3.3v thru my D43s and only could get 2.5-4-3-11 at 240 MHz.

Before:



After:

Yeah, when I loosened the timings, I didn't get any overclocking headroom. So decreasing the timings was the only way.

I found a voltmod for my card's GPU, according to Adrian's Rojakpot guide. The voltage regulator in the guide is 1575 PXCR, where as mine is 1575 PYFL. Should have the same specifications, will try out in 5 minutes.

I don't know where to measure the voltage, so I'm just going have to blindly try and see if I get anymore overclocking gains.

This post has been edited by colinwong89: May 13 2006, 08:54 PM

Voltmod was a success. Running my core at 541MHz now, and testing for higher as we speak.

During the first time, I didn't know how much I was supposed to pencil, so I just scribbled lines at the voltage controller package and legs. When I switched on my PC, garbage started lining up on my monitor. I switched off my computer, removed the graphite and made only two lines... that did the trick.

I benchmarked the card at 530MHz Core and 175 Mem, (my Core used to be 486MHz, Mem the same) and I only got improvements in 3DMark03 by 70 points. Seems that my video card is bandwidth limited.

Doing the voltmod also increased overclocking headroom for my memory. Initially from 168 MHz it went up to 183 MHz. Perhaps a chance to test for loosened memory timings?

Still conducting tests, full results will be out later.

I didn't use AtiTool's anti-overclocking feature. The BIOS that I flashed to my video card is already overclocking-friendly.

After all the tests, I could only squeeze in another 150 marks to 3DMark03.

I need a voltmod for the memory chips.

Haha, you can ask me and uzairi if you have any overclocking problems. Of course, uzairi is much more experienced.

Still searching for a TSOP voltmod.

Edit: Anyone knows what's a multiplexer/demultiplexer?

This post has been edited by colinwong89: May 17 2006, 12:25 AM

I don't think any voltage controlling is related to the multiplexer/demultiplexer. I can't seem to find the IC that controls the voltage distribution to the memory chips.

Yeah, I got my voltmods from that. The Gecube GPU voltmod works with my card, but I can't find any IC that's related to controlling the Vmem.

Wow, that's a great score. Is that RAM at your overclocking program at DDR speed or at normal speed?

Wow... that's real sweet. I got mine cheap, but I found out it only runs at DDR400 effective.

Is your video card using BGAs or TSOPs? Based on your speed and timings, most probably it must be BGA.

What's the AGP Booster mod for? Any differences after the mod? I'll check out your guide and see if it's compatible with my card. The big problem is, my card doesn't use the reference design, nor it uses the higher-end Gecube design which everyone commonly uses. Example, my card only has one voltage controller for the memory and GPU.
Hmm... everyone seems to use the unofficial DNA drivers. I thought they were only good for benchmarking. Might want to try that later.

Shah81,

You said that you tried different BIOSes for your 9550GT card. Doesn't the memory brand have to match with the BIOS together? Just a question.

My video card pics:

Got the pictures. Hope it's clear enough.

Unfortunately, I don't have one right now... I could get it from my friend, but I can't do it by tonight... only by next week.

Thanks loads Shah81, it's seriously very helpful of you. I only want a temporary mod, because I'm not very good in soldering, and I can't find the necessary components (eg. pots).

Once again, thanks.

I'm all for it. Only the problem is, finding the right parts for the mod might be quite hard for me, and I'm also afraid that I have to trouble you.

About the soldering part, let's just say that my soldering skills are not as good as yours.

By all means, please show me.

I recently did the GPU pencil vmod based on Adrian's Rojakpot website, and it worked. The only problem is now that I don't know how much voltage is going to my core (I just penciled the IC according to the guide).

One thing I realised, when I penciled more on the voltage controller, it seemed that my memory overclocking went slightly higher. Any ideas on this? Perhaps it's linked together?

Pardon me if there's any noobish questions. I'm not very familiar with electronics...

This post has been edited by colinwong89: May 21 2006, 11:39 PM

Okay, I'll check it once I get a multimeter.

I'm not really running on stock cooling, more like modified stock cooling. Used Arctic Silver, lapped the heatsink to 2000grit and replaced the stock fan with a better Sunon 40mmx40mm fan.

Will be getting a few heatsinks for the TSOPs by this week too, if possible.

Is it required to sink the MOSFETs too? The only four I see is the three at the front and the single one at the back.

Double posted.

This post has been edited by colinwong89: May 22 2006, 12:18 AM

Alright, I got it. Anything else I need to get besides the multimeter?

As for the heatsinks, I don't have any professional tools, and all the heatsinks have a seriously thick base, so I don't think my cheapskate tools would do the job.

I'll get the heatsinks from uglyvamp soon.

That is weird... the GPU voltage shouldn't affect the memory voltage.

By the way, I'm getting the multimeter by tonight, Shah81.

Just got the multimeter.

This post has been edited by colinwong89: May 23 2006, 10:29 PM

The first picture link is broken Shah81...