anyone heard of xp1700 tbred b cores

[chaotictech]

Im just wondering because i picked one uplast night asnd im wondering if there mainstream of if i just got really lucky. Its running at a cool 2075mhz w 1.7v. it'll hit 2.3w 1.8v and im using a junk aluminum cooler.

If you ever stop learning, YOU'ER DEAD!!

 

[vk2amv]

Is that as far as you could take it? I am rather dissapointed with that to be honest. Then again you are only using a cheapy aluminum cooler. The 1700 T-Bred B`s have been out for a while. Also the 2100 T-Bred B`s too. They nearly all seem to always get great overclocks. Over here in Australia we get dissapointed if we cant get at least a 100% overclock out of a 1700 with good watercooling. (I.E. 2.8 to 2.9gighz over 1.47gighz) if you get a halfdeascent cooler you should be able to take that CPU a lot higher. But to simplfy yes the T-Bred B 1700`s and 2100`s are mainstream.
AREA_51

'It's only when you look at an ant through a magnifying glass on a sunny day that you realise how often they burst into flames'

 

[lhgpoobaa]

yes.. you are the second person with a tbredB @ XP1700+ speeds. You my good sir have got a fantastic find on your hands.
I suggest you get a better cooler and find out what it can REALLY do

some XP2000+'s are also reported to be tbredB's too.

<b>My Computer is so powerful Sauron Desires it and mortal men Covet it, <i>My Precioussssssss</i></b>

 

[chaotictech]

thanks . I got an answer in the cpu forum but any other info would be helpful. like what cooler is best for ocing. Its been awhile(about a year) since i was in the ocing comunity.

If you ever stop learning, YOU'ER DEAD!!

 

[svol]

The best coolers at the moment are the Swiftech MCX462 and the Volcano 7 (but the 11 will probably be better once it is out).

Man, I would really like to get my hand on a T-bredB XP1700+.

My dual-PSU PC is so powerfull that the neighbourhood dimms when I turn it on

 

[chaotictech]

yea man the day before i got the a7n8x, so it was awesome when i realized that i had a b core.

If you ever stop learning, YOU'ER DEAD!!

 

[lhgpoobaa]

ditto... my tbredA XP1700 is a sweet little overclocker, but the tbredB whooooo.

ahhh well. too late now. Ill just wait for cheap barton xp2500+'s to arrive in quantity.

<b>My Computer is so powerful Sauron Desires it and mortal men Covet it, <i>My Precioussssssss</i></b>

 

[funkdog]

how do you tell it's a "b", I wouldn't mind getting my hands on one.

<b>"These are my thoughts, your mileage may vary."

 

[svol]

They have a different core stepping name... vk2amv knows which IIRC.

My dual-PSU PC is so powerfull that the neighbourhood dimms when I turn it on

 

[vk2amv]

What I know which IIRC? To be perfectly honest I dont even know what IIRC stands for. But if you mean I know what stepping code to look for than correct. I learnt a little bit from here ""http://www.overclockers.com/tips00173/"" Also for more people who have a T-Bred B fad at the moment goto ""http://www.atomicmpc.com.au/forums.asp?s=2&c=6"" and ask them a few questions. I learnt most of what I know about T-Breds from there. That is where I learnt what week codes and exact steppings to look out for to get nice overclockers. Though they mainly concentrate on the 2100 T-Bred B because the 1700 is still fairly scarce even though they are around over here in australia. But if you just want to get straight into it then a good core stepping to look out for is the AIUHB core stepping. Get that and you will be pretty safe for a good overclock. OH and this is not directed only at svol. It is for anyone interestered.
Thats all the advice I can give at the moment.
AREA_51

'It's only when you look at an ant through a magnifying glass on a sunny day that you realise how often they burst into flames'

 

[funkdog]

thanks for the info, the guys at fry's usually let me look at the steppings before purchasing an oem cpu. They are pretty cool about it, friend of mine got a 2100+ from there, doing 2.25 at last contact.

<b>"These are my thoughts, your mileage may vary."

 

[phsstpok]

"IIRC" = "If I Recall Correctly".

My Tbred 1700+ is on it's way from Newegg.com but I don't know if it's Tbred A or B. Several customers received the "B" but at the cheap price of $53 USD I think it's pot luck.

<b>99% is great, unless you are talking about system stability</b>

 

[lhgpoobaa]

well even with the A you can at least get 25% out of it...
Not a complete dead loss.

<b>Anyone claiming they can see the difference
between 450 and 500 FPS in Quake3 deserves to
be severely beaten with a rock. </b>

 

[phsstpok]

I should have read the customer comments more carefully. For about 3 weeks most customers have been receiving the JIUCB or JIUHB Tbred B steppings.

Tbred A or B, doesn't matter too much to me. My mobo only hits 150 Mhz FSB anyway which would mean 12.5 * 150 = 1860 if I'm that lucky. (Unless I'm really lucky <b>and</b> I want to mod the chip).

<b>99% is great, unless you are talking about system stability</b>

 

[lhgpoobaa]

awww thats too bad.
You should really mod the chip man!
the Last L3 bridge unlock is real easy to do... no filling trenches, just a small loop around the side with conductive ink/paint and your done!

moooood theeee chippppp
Then with the latest bios you can stay at 133fsb and get all the way up to 2200mhz or more!

<b>Anyone claiming they can see the difference
between 450 and 500 FPS in Quake3 deserves to
be severely beaten with a rock. </b><P ID="edit"><FONT SIZE=-1><EM>Edited by LHGPooBaa on 02/12/03 00:52 AM.</EM></FONT></P>

 

[chaotictech]

What bridge do you have to connect to unlock the upper multi's? im stuck at 12.5.

If you ever stop learning, YOU'ER DEAD!!

 

[phsstpok]

You got that wrong. The 5th L3 bridge represents the high order bit for multipliers. XP2100s and higher have the bridge open, meaning the bit is ON. If you close the bridge you enable 12.5x and LOWER multipliers. When the bridge is open then the HIGHER multilpliers are available.

XP 1700-2000 already have that bridge closed which means the high bit is OFF. To enable high multipliers on these processors you need to reverse the process, that is, cut the bridge.
To get my Tbred 1700 to 2000 Mhz (if I can) I'll need to have 15x if I want to run AGP and PCI at spec. Of course, on my old board I will run into the multiplier remapping issue which is a problem. Notice the remapping isn't as simple as adding the the high bit (8x) to the BIOS setting.

<b>Remapping table for older motherboards (Courtesy of JMC2)</b>

Bios setting...
5x = black screen
5.5 = same
6 = same
6.5 = same
7 = 15x
7.5 = 22.5x
8 = 16x
8.5 = 16.5x
9 = 17x
9.5 = 18x
10 = weird... bootup says 252Mhz x 1.0 (252 times ONE)
norton info say 2300Mhz (1.85 volts)
10.5 = black screen
11 = same
11.5 = 19x
12 = black screen
12.5 = 20x

Notice that 7X gets remapped to the 15X and that is the multiplier I want. The problem is that the XP 1700 has a default of 11x. Notice 11x get remapped to something that won't POST (probably 23X-28X). This means I also have to mod the chip with a usable default multiplier. This also presents a problem. According to the table above, 15X is the lowest remapped multiplier. This means If my processor won't work at 15x133, the lowest combination once the 5th bit is enabled, then I won't be able to post at all.

This is why I am hesitant to mod the chip.

If you want read about this stuff check out Usenet at Google Groups. Lot's of people are successful with Tbreds on older motherboards but there are tricks and risks.

I've heard of people reaching 2.4 Ghz with a Tbred 2100+ on old KT133 motherboards. That's 24 x 100.

Haven't heard much about Tbred B 1700's yet.

Also checkout this site (Wes Newell's website).

<A HREF="http://mysite.verizon.net/res0exft/" target="_new">http://mysite.verizon.net/res0exft/</A>


<b>99% is great, unless you are talking about system stability</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 02/12/03 04:06 PM.</EM></FONT></P>

 

[lhgpoobaa]

allright... i bow to your superiority here

but 24 x 100 with sdram??? do you know how bandwidth restricted that will be???


<b>Anyone claiming they can see the difference
between 450 and 500 FPS in Quake3 deserves to
be severely beaten with a rock. </b>

 

[phsstpok]

Yup, very bandwidth limited. However, if any AIUHB core Tbred B's get binned as 1700's watch out. You could give your average Tbird 1000 system + KT133 mobo a nice boost for short money, about $50-$60 USD.

Even bandwidth limited a 2.4 Ghz system can still do some decent DIVX and MP3 encoding. Remember, the floating point unit is very fast, and you add SSE and hardware prefetch which the Tbird didn't have. Gaming will improve also but probably will be more limited by the low bandwidth.

Looking forward to doing some benchmarks (even if I only get to 1800 Mhz). I have a KT133A mobo by the way. I just mentioned the other example because I was impressed that the Tbreds even work.



<b>99% is great, unless you are talking about system stability</b>

 

[lhgpoobaa]

I guess, but when i went from a kt133A to my kt333 my divx scores skyrocked as i got a massive memory bandwidth boost, even with the system bus still at 133 (and this was with a low end 1333Mhz)
But i guess it would be better than nothing.

heres an interesting link i found, how to unlock similar to the toms way
<A HREF="http://www.lostcircuits.com/cpu/amd_unlock/" target="_new">http://www.lostcircuits.com/cpu/amd_unlock/</A>


<b>Anyone claiming they can see the difference
between 450 and 500 FPS in Quake3 deserves to
be severely beaten with a rock. </b>

 

[phsstpok]

Hey that's great. I'd paint rather than solder any day.

The motherboard mod's aren't new though. I remember mods to wire dip switchblocks to motherboards to enable multiplier adjustments. Someone found the pinouts corresponding to the L1 bridges back in the early Duron Spitfire days. I was surprised that more people weren't doing it.


<b>99% is great, unless you are talking about system stability</b>

 

[lhgpoobaa]

it is quite a nifty idea instead of wiring up the pins of the CPU.

relativly simple and hastle free, plus you can swap out processors like normal.

<b>Anyone claiming they can see the difference
between 450 and 500 FPS in Quake3 deserves to
be severely beaten with a rock. </b>

 

[phsstpok]

Well closing the 5th L3 bridge is relatively easy as in your link. Cutting the bridge would be more difficult which reminds me...

I just remembered why more people didn't do the switchblock mod. You can't override the processor bridges. To make it work you find the corresponding pinouts on the back of the mobo then cut the traces then you can BYPASS the traces.

Rather tricky surgery cutting the traces on a multilayer motherboard without damaging anything else.

<b>99% is great, unless you are talking about system stability</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 02/12/03 11:12 PM.</EM></FONT></P>

 

[phsstpok]

Well the Tbred B (JIUHB, week 2) is here and it's nice. I'm running it at 1875 Mhz (12.5 * 150) and it's at a cool 34 degrees. (Don't know how accurate my motherboard sensor is. I can't even find it. LOL!. My old Abit mobo had a thermister in the middle of the socket. There's nothing visible on the Epox 8KTA3PRO).

I haven't had time to do any real benchmarking but it seems stable at 1.7 volt. Actually it seemed stable at 1.6 volt. I haven't stressed it yet, in either case.

I've got it overclocked as far as my motherboard will let me. I had a glimmer of hope for more when I discovered my BIOS has mulitpliers of 13x and 14x. When I POSTed at 14x the BIOS reported Unknown CPU at 2100 Mhz but when I got into Windows I discovered the system running at 750 Mhz (5 X 150). :frown: 13x was interpreted as 12.5X which puts the CPU at 1875 Mhz. This is exactly what I thought would happen but the 14x multiplier had me hoping.

I don't know if I'm going to risk cutting the 5th L3 bridge to get at the higher multipliers.

I am curious how far this thing will overclock, though.

<b>99% is great, unless you are talking about system stability</b><P ID="edit"><FONT SIZE=-1><EM>Edited by phsstpok on 02/14/03 03:44 PM.</EM></FONT></P>

 

[lhgpoobaa]

well judging by what others get you might be able to run at 1.65v at that speed or possibly lower.

keep lowering the voltage till the benchmark programs and games crash.

<b>Anyone claiming they can see the difference
between 450 and 500 FPS in Quake3 deserves to
be severely beaten with a rock. </b>