Overclocking with XP-1700 T-Bread "B" / Is this good, or should it do more

[Herkulese]

I recently switched my old XP-1700 "A" for an XP-1700 "B" (It came available, so I tried it out)

I am very happy with these results, but I am curious.
Should I be able to get any more out of this CPU or should I, simply, take the money and run?

The best I could do, with a T-Bread "A", is as follows:

1.76gh (185 x 9.5)

- MOBO - EPOX 8RDA (not +) rev 1 (nForce-2 without full 400fsb support / Best FSB - 185mh)
- CPU - XP-1700 (T-Bread "A")
- RAM - Crucial pc2700 (2ea 256mb sticks)
- HS & Fan ? Dr. Thermal TI-V77 (28cfm / 3200rpm)
- vCore = 1.70v
- vDimm = 2.77v
- Idle Temp = 34c
- Load Temp = 49c to 51c
- Prime Stable no errors after 16 Hours

Here are the results for the XP-1700 (T-Bread "B"):

1.95gh (185 x 10.5)

- Same system
- vCore = 1.75v
- vDimm = 2.77v
- Idle Temp = 35c
- Load Temp = 43c to 45c
- Prime Stable for 22 hours (Stopped the test so I could use the PC)

 

[SickBeast]

That's a pretty average overclock to be honest. I have my 1700+ "B" chip at work running at 12.5x166=2066mhz at 1.70v. Don't be afraid to mash the vcore up to 1.825v or so, provided you have decent cooling and your temps are ok. You should be able to hit 2.1-2.3ghz out of that chip if you work at it. Good luck.

 

[Killrose]

I've had a lot of 1700+ B's go thru my little fingers, and they all did much better than that. I would coinsider that a poor overclocker from my experience. I think I would try a lower FSB and a higher multi and see what it will work at.

You could very well be on the edge of stability @185MHz with your 8RDA. I would test my CPU
performance with a lower FSB/high multi with your system, and judge it by what it will do then.

I have an 8RDA modded with a variable pot to get mine stable at over 200MHz

 

[Corporate Thug]

i've tried 3 1700+ B's and they got to 2.2 ghz on 1.8V or less and an 1800+ that did 2.5 ghz so i would say you still have some headroom

 

[rogue1979]

I've been through at least ten 1700 or 1800 "B"'s. They all hit 2000MHz, most 2100MHz and a couple went for 2200MHz. Never went over 1.8v on good air cooling.

 

[bootoo]

Run it there a month and then try pushing the multi up a notch again. Bump the voltage to 1.8 of course.

I never had a rev 1 8rda+ but I have 2 rev 1.1's and I hope you can go even further and have more fun!

 

[Killrose]

The best 1700+ I came across did 2.4gig@1.8v, I put it out to pasture in my second comp running 2.0gig@1.55v, Better than all the Bartons I have gone thru lately, even the few mobiles i've had.

 

[jjyiz28]

you mind posting the whole 5 digit code?? also, its it a dlt or dut??

 

[Herkulese]

Thanks for all the comments.

From the looks of things, I should be able to get a bit more out of this CPU

Regarding the MoBo (8RDA rev 1) I can't run stable above 185fsb, but that could be my Crucial PC2700ram holding it back. I may try running a-sink, just to find out.

I tried 2.04gh (185 x 11) with vCore at 1.8v but it was no good.
I will try again with 1.85v, but I am concirned about my cooling.

The next thing would be to get a 70mm t0 80mm adaptor and a good 80mm fan and go for broke.
________________

BTW: Do I need to put active cooling on the nForce chip? If so how do I get the old one off?

 

[rogue1979]

There's a fairly easy vdimm mod I used on two different 8RDA rev. 1 boards to get them both stable at 200MHz.

 

[Killrose]

2.04gig@1.8v is not a good sign. I would not give it any more vcore than that personally. I think you got a stinker

How does your 5+ line look under load? maybe you are having PSU issues.

 

[Herkulese]

"2.04gig@1.8v is not a good sign. I would not give it any more vcore than that personally. I think you got a stinker"

Yes my 1.95gh oc is a far cry from the 2.2gh and 2.3gh some are getting, but I would hardly call a CPU that will render a solid, stable 33% overclock, at .5 volts over stock, a stinker.........

..............Far from optimal, maybe, but not a stinker.........

It might be my board as well.
I will drop the FSB down to 180 x 11.5 (2.07) and try again.

Thanks again for all the comments.
_____________

Power Supply - Anteck True Power 430
the 5volt rail is holding at 4.98v

 

[Herkulese]

Update,

Last night I dropped the FSV a bit, and set this thing as follows:

Settings:
2.07gh (180 x 11.5)
vCore 1.9v

Results:
Prime95 for 2.5 hours (Errored out / Failed, but improved / Prev time was less than 5 min.)
High Temp - 51c

Given the OK, but not great, cooling that I am using, this temp is not bad at all, so I am going to try it with 1.925v just to see how it goes. If the temp does not get above the low 50's, I am going to let it run.

If it does well, I plan to get a 70mm to 80mm fan adaptor and put a better fan on this Dr. Thermal heat sink. Also using the adaptor to raise the fan above the heat sink should help cool the center copper core better as well.

Oh well, it is a fun experiment either way.

Stay tuned..........

 

[deadseasquirrel]

i bet some other component in your rig is not liking your 180fsb (maybe the crucial ram.... not the best overclocker out there).

i'd try to drop the fsb back down to 166 (heresy, i know... put me in shackles) and bring the multi up to 13.5x. that's where i have my tbredB 1700+.

edit: you should also be able to lower your vcore back down a bit... mine's at 1.8 or 1.825, don't remember.

 

[ponyo]

I've Tbred B 1800+ DLT3C in my wife's internet rig. I'm running single Crucial pc2100 ram at 166 fsb. Currently it's running at 12x166=1992mhz or basically 2ghz at 1.45 actual vcore. If I bump the vcore up to 1.8, I can run it Prime stable at 2.4 ghz but all my wife does with this machine is surf the web so I rather run it cool.

I had a Tbred b DUT3C 1700+ long time ago that I bought at Newegg for around $40 that did 2.2 ghz at 1.75 vcore. I gave that one to my sister.

2 ghz is ok with b1700+ but it's below average for that line of chip IMO. Most of those chips had no problem doing 2.1-2.2 ghz on 1.8 or less and 2.4-2.5 was the target for dlt3c.

 

[thebestMAX]

My 1700+ TBred B (DUT3C) has been running at 12.5x166 in my 8RDA+ board for well over a year now with Crucial PC2100 Ram!! Just got some OCZ RAM and it has come to life! Havent touched the Vcore yet!
Vantec Aeroflow for cooling.

 

[Herkulese]

" bet some other component in your rig is not liking your 180fsb (maybe the crucial ram.... not the best overclocker out there)."

If you look at the original post for this thread, you will see that this system has no problem running, Prime Stable at 185fsb x 9.5.
_______________

I did, however, decide to drop back to 180mhz FSB and see what it could do, with even more voltage, and finally had success at over 2ghz.

I set the system as follows:

SETTING #1
- Speed = 180x11.5 (2.078ghz)
- vCore = 1.9v
- Max Temp = 50c
- Result = Prime 95 for 2 hours

SETTING #2
- Speed = Same
- vCore = 1.925v
- Max Temp = 51c
- Result = Prime 95 for 6 hours

SETTING #3 ( SUCCESS )
- Speed = Same = 180 x11.5 (2.078ghz)
- vCore = 9.50v
- Max Temp = 51c Max (dropping to 49c at times)
- Results: Prime95 for 21.5 hours / 0 - errors (Had to stop testing so I could use the PC).

It is still not 2.2 or 2.3ghz but I am happy with it for now.

Next, I will try 185 x 11 (2.035ghz) at this voltage, and see if it will run. It should, as it ran there with 10.5 and lower voltage, but time will tell.


I have an 80mm / 32.5cfm / 29dba fan, and a 70mm to 80mm reducer on order, and will try to go further after I get them installed. That will be around 5 cfm more than I have now, and the fan will be raised above the heat sink about an inch, which should optimize the airflow over the entire heat sink, especially over the copper core. I could have went for more airflow, but wanted to keeo the noise down.

The challenge goes on...............

BTW - What is the highest vCore that these CPU's can be run at safely, given that the temps remain cool?

 

[NewBlackDak]

I've had 3. One did 2.0GHz, but that was topped out on the mobo it was on, so maybe it had more. One does 2.2@1.85, and won't go higher even with 2.0V. The last does 2.4@1.85. It might do more, but I never gave it any more v cause it was just SLK800 cooled, and was getting toasty at those speeds