Possible to write your own SPD ??

**DaWaN** · 08-31-2006, 10:57 AM

Hello, I have 2x512mb Micron OEM memories with D9DQW chips. They'll do 500mhz 4-3-2-8 easily. But I have a problem, the memory is rated at PC2-3200. So it doesn't boot in my Biostar. Is it prossible to flash a PC2-4200 SPD to make it boot ?
Thaiphoon burner doesn't seems to flash the SPD completely is that really true ? If it doesn't flash to that area is it still possible to let those sticks boot in my Biostar ??

**kiwi** · 08-31-2006, 11:03 AM

Thaiphoon works just fine, at least on ddr1 (haven't tried ddr2). You just need to find the correct dump, same capacity, same chips preferred

**DaWaN** · 08-31-2006, 11:16 AM

Originally Posted by kiwi

Thaiphoon works just fine, at least on ddr1 (haven't tried ddr2). You just need to find the correct dump, same capacity, same chips preferred

Nice

If somebody has 512mb sticks of Corsair 5400C4 v5.2 and willing to make a dump for me plz upload it (or PM it). Micron OEM 512mb PC2-4200 or PC2-5300 with D9DQW chips should even been better.

**Chura** · 08-31-2006, 01:02 PM

sorry for the newbie question, but what is SPD ?
i've seen it alot, but cant find any explanation...

thanks

**Pyr0** · 08-31-2006, 01:13 PM

serial presence detect, it's a little chip on the memory sticks that hold the pre-programmed speeds/timings , manufacturer info etc. to be read by the motherboard
http://en.wikipedia.org/wiki/Serial_Presence_Detect

**hicookie** · 08-31-2006, 03:50 PM

Originally Posted by kiwi

Thaiphoon works just fine, at least on ddr1 (haven't tried ddr2). You just need to find the correct dump, same capacity, same chips preferred

ddr2 works fine

**breakfromyou** · 08-31-2006, 06:42 PM

ive been wondering if you can as well. the sticker on my ram says PC4200 3-4-4-8 even though its PC3200. man i love patriot. it only has SPD info for 200 MHz though.

**Deathspawner** · 08-31-2006, 09:17 PM

Originally Posted by breakfromyou

ive been wondering if you can as well. the sticker on my ram says PC4200 3-4-4-8 even though its PC3200. man i love patriot. it only has SPD info for 200 MHz though.

Ignore the SPD when it comes to that... they make it low on purpose so that there will be no issues with a primary boot so you can manually configure it. If it's PC2-4200, there is probably a secondary SPD for 266MHz or around there.

**DaWaN** · 09-01-2006, 06:31 AM

Does somebody has a dump for me ? Any D9DQW 512mb stick should do I think

**kiwi** · 09-01-2006, 01:28 PM

I can give you corsair pc8000UL dump 512MB D9. I am not sure which D9 is it, I call it old school D9

1 pair also does 500 4-3-2 2.4V so they should be similar in terms of chips

**TimPrice** · 09-01-2006, 06:21 PM

is possible flash 1gb fat body 6400 sticks to 5 5 5?

**Jaco** · 09-02-2006, 12:04 AM

you can also try to modify the current SPD settings with Thaiphoon. (Take a dump first , for safety reasons

)
No garantuee it will work, but worth a try for sure. With Thaiphoon you're not changing ALL SPD parameters. (so i've been told) .
From personal experience, some SPD chips can also be 'write protected'.

**DaWaN** · 09-03-2006, 02:28 AM

Well i've got my sticks working in the biostar but it didn't go without a hitch.
I had a dump of Ballistix PC5400 Fat D9. I wrote it into the SPD and guess what... Stick didn't booted anymore. Also I saw that Taiphoon only writes to the first stick. So I dumped a Corsair 6400 Fat D9's SPD. Started with one stick in slot 3 and while windows was running I pushed the stick with the faulty SPD in and flashed it to the Corsair SPD. After that stick worked again I flashed the other stick and now they boot in my Biostar. It's pretty cool because it's OEM PC2-3200 and it now identifies itself as PC2-6400 Corsair

**Yoxxy** · 09-03-2006, 05:47 AM

Yeah you are pretty lucky. Pushing ram in while computer is running can only lead to problems.

**Lestat** · 09-03-2006, 06:33 AM

Originally Posted by DaWaN

Well i've got my sticks working in the biostar but it didn't go without a hitch.
I had a dump of Ballistix PC5400 Fat D9. I wrote it into the SPD and guess what... Stick didn't booted anymore. Also I saw that Taiphoon only writes to the first stick. So I dumped a Corsair 6400 Fat D9's SPD. Started with one stick in slot 3 and while windows was running I pushed the stick with the faulty SPD in and flashed it to the Corsair SPD. After that stick worked again I flashed the other stick and now they boot in my Biostar. It's pretty cool because it's OEM PC2-3200 and it now identifies itself as PC2-6400 Corsair

holy crap dude... wow... foolish to say the least..

now link us to a site that has that ram so i can go buy 4 gigs of it and flash them all to the corsair hahaha

**DaWaN** · 09-04-2006, 08:03 AM

Originally Posted by Lestat

holy crap dude... wow... foolish to say the least..

now link us to a site that has that ram so i can go buy 4 gigs of it and flash them all to the corsair hahaha

I bought it second hand

It's OEM memory out of a Dell PC afaik. It was produced on 0502 so that's more than 1,5 year ago, too bad for you

**zachy** · 09-15-2006, 03:38 AM

I've got similar problem like DaWaN.

My sticks are: 1GB Micron D9DQW PC2-3200 (some getaway chips for Dell Dimension 5150 E510 for thoose who wanna look for them) and theres problem with booting P5B DLX.
Any SPD's with 533/677/800 speed for thoose modules would be great too.

**erwinz** · 09-15-2006, 04:00 AM

nice find.. flash it..

but be careful..

its really is risky..

**zachy** · 09-15-2006, 04:14 AM

Originally Posted by erwinz

nice find.. flash it..

but be careful..

its really is risky..

Sure i'll, but first i need some better SPD timings like i said.
Im gona make backup of old ones too, so there should be no problem at all.
Also i'll try finding any other method of flashing, coz i cant imagine putting sticks into working rig (seems like way too extreme for me

).

**DaWaN** · 09-15-2006, 06:28 AM

I use Corsair 5400C4 SPD now, works fine

You just have to boot with a stick in slot 2/3/4 and then in windows push the stick STRAIGHT in slot 1, then you can flash the stick

**zachy** · 09-15-2006, 09:03 AM

Originally Posted by DaWaN

I use Corsair 5400C4 SPD now, works fine

You just have to boot with a stick in slot 2/3/4 and then in windows push the stick STRAIGHT in slot 1, then you can flash the stick

Is it safe to put memory while ur computer is working?

Sad thing is that i cant boot my system with thoose fat bodys even with other mem at bank 1,2,3 or 4 and thats trange. Im gonna try Your method then.
If i cant get that spd im looking for i gonna modify oryginal one.
Theres nice page with all bits well described.

As You can see - there is possibility to write own spd by editing values to match higher timings if You need it.
Im gonna try with thoose 53E and then 667 soon.
Still im bit aware of putting mem into working comp.

**DaWaN** · 09-15-2006, 09:29 AM

Originally Posted by zachy

Is it safe to put memory while ur computer is working?

Sad thing is that i cant boot my system with thoose fat bodys even with other mem at bank 1,2,3 or 4 and thats trange. Im gonna try Your method then.
If i cant get that spd im looking for i gonna modify oryginal one.
Theres nice page with all bits well described.

As You can see - there is possibility to write own spd by editing values to match higher timings if You need it.
Im gonna try with thoose 53E and then 667 soon.
Still im bit aware of putting mem into working comp.

Ofcourse it isn't risk free, but as long as you put the memory STRAIGHT in it should work fine, still I can't guarantee it though.

Just try to find somebody / some shop that has compitable hardware to flash your memory in, safest method by far

The fact that I had to hotplug because it didn't booted anymore with the other SPD....

**alexio** · 09-15-2006, 09:52 AM

Originally Posted by DaWaN

Ofcourse it isn't risk free, but as long as you put the memory STRAIGHT in it should work fine, still I can't guarantee it though.

The fact that I had to hotplug because it didn't booted anymore with the other SPD....

Your way is not really smart. It's a much better idea to isolate every pin of the module except the SPD pins and then boot with it.

EDIT: Plastic sticky tape works best for this.

**Lestat** · 09-15-2006, 10:30 AM

Originally Posted by alexio

Your way is not really smart. It's a much better idea to isolate every pin of the module except the SPD pins and then boot with it.

EDIT: Plastic sticky tape works best for this.

interesting concept.....

i cant believe the system didnt hardlock when he hotplugged them..
not to mention totally fry the ram or the mobo itself.

**alexio** · 09-15-2006, 10:42 AM

http://www.simmtester.com/page/news/...ws.asp?num=139

Et voila, it's easy to completely adjust everything (from tings to subtimings etc) in the SPD. I'm not 100% sure you can hex edit with typhoon, but it's easy to do with a hex tool, like hex workshop

I don't think this information was known here untill now. Should I open a new thread about it? Maybe write a small tutorial too?

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