AMD XP1800+ overclocking

Hi there guys!

I just received my XP1800+, now running @ 2100MHz, 1.7v.

35 idle and 43 full, cooler: SLK900U with a Ystech 92mm.

Stepping: DUT3C JIUHB 0311 UPMW

This was my first overclocking attempt... how far should I go (maximum) with the vcore? 1.8? 1.85?

[Norrko]

Hi there guys!

I just received my XP1800+, now running @ 2100MHz, 1.7v.

35 idle and 43 full, cooler: SLK900U with a Ystech 92mm.

Stepping: DUT3C JIUHB 0311 UPMW

This was my first overclocking attempt... how far should I go (maximum) with the vcore? 1.8? 1.85?

The thing that in the end will kill the CPU is heat. You could raise the voltage (almost) as high as you desire as long as you could chill it properly.
Try to stay below 55 C when you utilize the processor at 100%.

For example, I'm using 2.05 V and the die-temperaure is 3 C at full utilization.
The DUT3C standard voltage is 1.60 V. You could use 1.8-1.85 V as you mentioned. But keep an eye on the temperature.

/Norrko

1.8v is "safe". Anything higher is "at your own risk".

That's an excellent stepping! I've seen people overclock it to 2700 MHz, with watercooling.

Hehe.. well.. I can't get over 2.2 stable with 1.85 vcore.

I have not had the time to test with higher vcore, but I'll try with 1.9 and maybe 1.95... The fulload temp is not approx. 45 degrees Celsius.

Acceptable :)

Aaaargh!

I get so frustrated... it won't go over 2200! :(

I've tested with raising the vcore to 1.9, don't know if I dare to have more than that... :)

What do you think?

Can you afford to try it?

[Norrko]

Quick question...

Multiplier and FSB?

To my knowledge,the XP1800 is not the best overclocker... regardless of the stepping, in contrast to it's more famous brother, XP1700.
I think that if you have really good luck, you could find a gold nugget in those batches, but it can't match the XP1700's where you could reach incredible speed with almost every Throughbred B you could lay your hands on.

/Norrko

11x200.. the memory bus is not overclocked at all.. :)

Hmm... well.. it's rather hard to get a good XP1700+ today...

[Norrko]

You could try to increase the FSB, MHz by MHz...

If you do that, you could see if the chip really max out at 2.2 MHz. I have a feeling (that's my feeling) that some chips don't like high multipliers together with high FSB's.
I had an XP1700 that hit the roof at 2.3 MHz but when I lowered the multiplier and raised the FSB I could reach almost 2.4-2.45 GHz.
Coincidence? I don't actually know.

/Norrko

[Remix]

You could try to increase the FSB, MHz by MHz...

If you do that, you could see if the chip really max out at 2.2 MHz. I have a feeling (that's my feeling) that some chips don't like high multipliers together with high FSB's.
I had an XP1700 that hit the roof at 2.3 MHz but when I lowered the multiplier and raised the FSB I could reach almost 2.4-2.45 GHz.
Coincidence? I don't actually know.

/Norrko

I've seen the same, I was able to get my XP 2000+ stable at 2.1 GHz with a low multiplier and a high bus...162 MHz and a 13x multiplier, whereas 15x and 140 MHz overheated it very quickly.

And the CPU temperature is 53 C at full load with 20 C ambient temperature.