AMD 2000+/ MSI KT4 Ultra

[c627627]

With good power supply, cooling etc.
T-Bred A averages 2.0 GHz or 2400+
T-Bred B averages 2.3 GHz or 2900+

Sometimes more, sometimes a little less but it helps you see where you would be in relation to average overclocks.

I wouldn't go above 1.80 volts Vcore. Read the mobo manual to see where in bios you would increase CPU voltage.

2.0 GHz is about 180 FSB x 11.

Your RAM and mobo limitations are 180ish FSB.

If you're asking for a guess, expect at the most 18x FSB where x is 0 to 9.

Don't screw around with retail cooling and read the link on how to appply thermal paste carefully if you get a better heatsink. (Thermalrights are the best.)

 

[rcillig]

Ok thanx Im sure ill have more questions when I get better cooling.

also my vcore is at 1.60 right now I see where to increase it but how far and do I need too?

 

[c627627]

Oh yes, Do it gradually. And end up with 1.80 V for 180ish FSB overclock.
(You don't want to go straight to 180-something FSB.)

This increases the temperatiure so don't be doing this with retail heatsink.
Don't put too much thermal paste when you you get a new heatsink. Follow those directions:
http://www.arcticsilver.com/arctic_alumina_instructions.htm

Also don't go higher with FSB even if you can since your mobo is not nForce2 with PCI lock.

190 FSB / 5 is 38 that's the safe limit for 166 FSB /5 default.

 

[rcillig]

ok got ya, when I get a fan what temp is too high and what should it be normally?

 

[c627627]

When the CPU is under heavy stress, like when you're testing it for stability by running Prime95 Torture test, I'd say low 50's celcius is acceptable.

_____________________
2100+ AIUHB 0248 MPMW
256MB Crucial PC2100 + 2x 256MB Kingston (Hynix chip) PC2100 @ 6 3 3 2
[152] FSB x 15 = 2280 MHz @ 1.8 Vcore with memory frequency at 100% [152] @ 2.77 Vdimm
37(min) C to 46(max) C Winter ; 42(min) C to 50(max) C Summer
Epox 8RDA+
Thermalright SK-7 with variable speed 80x25mm YS-Tech FD1281259B-2F
BFG GeForce4 Ti4200 8X 128MB; Antec SX-835II case ; 350W Antec SmartPower SL350
Five 80x25mm Ultra Quiet 18CFM Case Fans (NMB C3110KL-04W-B19)

 

[maxlaser5]

FSB and Memory Clock

I have a similar setup: AMD 2000+ Tbred B, Soyo KT400, PC2700 RAM. Since my Soyo does not officially support PC3200, I only set the memory speed to 166MHz, can I change the FSB to 167MHz - 180MHz while keeping the memory at 166MHz? I tried to run the memory at 200MHz and it just won't boot. Thanks.

 

[c627627]

In your case maxlaser5, you have PC2700 RAM.
Here's what that means:
http://www.pbase.com/image/19261650/original

166 to about 180ish FSB.

KT400 VIA chipset does not have a PCI lock. That means with the /5 divider 166 / 5 is around 33 default.

190 FSB / 5 is max safe of 38.

200 / 5 is 40. If you have a VIA chipset instead of the PCI locked nForce2 chipset, that's hard drive scrambling territory so forget about above 200 FSB.

With good cooling, (don't be using retail heatsink) you may hit your mobo's max of 180 FSB with your PC2700 ram. Maybe 170something will be max, but see what passes 12 hours Prime95 torture test.

Of course, you'll need 1.8 volts Vcore so your mobo theoretical max of 180 FSB times 12 or 12.5 multiplier would be the max if you also increase the Vdimm voltage. Just do it gradually.

 

[rcillig]

ok how long do I need to run the torture test, I ran it for 12 hrs last nite and got no errors... or warnings.

12* 180 = 2.162... you think I can get more outa that or is that a good place to stay at.

as for temp.... it got in the in the high 40's Celcus that is.... during the test.

 

[c627627]

Excellent. You're in excellent shape with 12 hours Torture testing with no program errors. Get rid of the old crap from sig and put the new stuff in, similar to the way I have it in my sig, with all relevant info.

PC2700 and VIA chipset 180 FSB is about right on the safe side.

Now maybe you may up the multiplier. 12.5 x 180 would be close to the limit for the T-Bred B. Maybe try lowering FSB a bit first to test it with 12.5.

Good job!

_____________________
2100+ AIUHB 0248 MPMW
256MB Crucial PC2100 + 2x 256MB Kingston (Hynix chip) PC2100 @ 6 3 3 2
[152] FSB x 15 = 2280 MHz @ 1.8 Vcore with memory frequency at 100% [152] @ 2.77 Vdimm
37(min) C to 46(max) C Winter ; 42(min) C to 50(max) C Summer
Epox 8RDA+
Thermalright SK-7 with variable speed 80x25mm YS-Tech FD1281259B-2F
BFG GeForce4 Ti4200 8X 128MB; Antec SX-835II case ; 350W Antec SmartPower SL350
Five 80x25mm Ultra Quiet 18CFM Case Fans (NMB C3110KL-04W-B19)

 

[rcillig]

Ok will do.... thanx for all yuor help.