Okay at 199 no go at 200???

[ral]

I can overclock to 2083MHz (166x12.5) stable and also 2035MHz (185x11) at default vcore on a **** **** with an XP2100.
Have not tried other combinations yet.

Previuously I had this same CPU do 2405MHz (170x14) on an Epox 8K9A2+ at 1.875v vcore and 2083MHz (166x13) at defualt.

So anyway I was tryign to reach a 200FSB. I could get into Windows with no signs of instability at 199x10 (1990MHz) at default vcore, though I have not thorughly tested this setting for stability...

When I go to 200x10... I dont even post.

Upping vcore from 1.6 to 1.65 and relaxing memory timings (3-7-7-8) does not help. Vdimm defaults to 2.7 (which is the max setting on my board).

By the way using a pair of borrowed 256MB GeiL DDR400's Cas 2.5-3-3-6.

Any ideas.

[SteveI]

Just a guess... but maybe try with just 1 stick of mem?

[ral]

Sorry to mention I already did that...

By the way... that was fast.

[ral]

Okay... my problems are the mulitpliers.

9, 9.5, 10, and 10.5 only work until 199.

8, 8.5 and 11 work at 200 in fact did 207MHz x 11 and 220MHz x 8.5.

Darn, 9-10 are probably the most important multipliers for a NForce2 Ultra 400

[SteveI]

That's kind of unusual. However, I've never used an MSI board. It may be a quirk of the board. Is there a CPU Interface setting you could play with? I have heard for NF2 boards, it seems to interact and affect oc settings is odd ways. PLay with it, see if it helps or improves benches too.

[ral]

Well, I wire tricked the thing so it is a completely unsupported feature.... dont see any CPU Internface feature.

[SteveI]

I've never needed the wire trick so I never tried it. It might be related somehow... That's new territory for me.
The CPU interface should be in the overclocking screen... it may have a different name. The options should be "no", or "aggressive" I think.

[ral]

Thanks, I found it. The options are normal and High Performace. I will try it out and see if that solves the problem.

[cloasters]

Mainboards have quirks, some of them are allergic to exactly 200 Mhz FSB. It's possible that it will run at 201 Mhz.

[SteveI]

Originally Posted by cloasters

Mainboards have quirks, some of them are allergic to exactly 200 Mhz FSB. It's possible that it will run at 201 Mhz.

I have to agree.

I've got a CPU that hates 1.875v.... It is fine at 1.85, and 1.9. Another with the same stepping can't handle anything over 1.75v...

There are add quirks when you run a system out of specs.

[ral]

Well tried 200 amd 202... lemme try something higher

[SteveI]

Originally Posted by ral

Well tried 200 amd 202... lemme try something higher

Go for it... just remember to use conservative memory timings.

[ral]

Will do... but will have to wait till tomorrow. I have been trying different borrowed sticks of mem (have good friends) to see what I should buy for myself.

Managed to use a set of PC3200 GeIL's (good for 400 maybe a little more) and OC3200 Corsairs (great but painful on the wallet)... right now though am back to my P2700 Kingston DIMM's.

[SteveI]

Originally Posted by ral

Will do... but will have to wait till tomorrow. I have been trying different borrowed sticks of mem (have good friends) to see what I should buy for myself.

Managed to use a set of PC3200 GeIL's (good for 400 maybe a little more) and OC3200 Corsairs (great but painful on the wallet)... right now though am back to my P2700 Kingston DIMM's.

I've had good luck with Kingston 2700's, but I think it is useless to attempt to test the mobo at high fsbs (over200) with it. I barely could get 205 w/ slow timings.

[ral]

Whats avaialble here are the DDR400 Twinmoss TMD 5N's chips, Kingmax DDR400 (CL2.5) and Geil DDR400 2.5-3-3-6. All about the same price.

About 20% cheaper are the Twinmoss DDR333 Winbond CH5 chips.

And about 40% more expensive are the Corsair CMX3200-C2PT modules.

All 256MB dimms.

Any recommendations?

[SteveI]

Seems twinmos would be a good choice for the money.
5n is nice. Is it rated for cas2?

[ral]

Originally Posted by SteveI

Seems twinmos would be a good choice for the money.
5n is nice. Is it rated for cas2?

CL2.5. Sold as a dual channel kit, but I have read that they are not really matched pairs.

[ral]

The only CAS2 DDR400 memory available here are the Corsairs.

[ral]

Hhhhmmmm motherbaord type edited out of the first post? Why?

[ral]

On the way to buy memory saw something that the future wife wanted so I bought it... anyway with my budget curtailed I decided to roll the dice and get 2 dimms of 256MB DDR333 Twinmos Winbond CH6 CL2.5.

Anyway....

XP2100 @ 2200MHz (11x200) at 1.6v vcore.
2 x 256MB DDR333 Cl2.5 @ 400MHz 2-3-3-7 at 2.7v vdimm
MSI K7N2 Delta-L