My new 3800 X2

[Pederv]

My goal was to get 10 X 233 and I got there, here's the system:

3800 X2 @ 2333 MHz XP-90C 40C idle 53C load (increased CPU voltage by 3.3%, from 1.32V to 1.36V)
MSI Neo2 Platinum BIOS - 1.B
2GB Mushkin XP4000 Redline 2.5-3-2-7 @233 MHz
ATI X800 XT AIW
Creative Audigy 2
200GB WD PATA
5 X 18GB Quantum Atlas 10K
Plextor PX-716A
Lite-On DVD
3.5 inch floppy

I tried taking the HT to 4X and setting the CPU for 8 X 250 and the AGP to 67, but it wouldn't boot. Is there a trick that I missing? Would I need to up the CPU voltage to run at the faster bus, even though the core frequency is the same? If possible I was planning on taking the system to 9 X 266 for 2.4GHz, at a later date.

 

[Furen]

Does it POST? I'd try increasing the DRAM divider (reduce the bios operating speed). Also try setting your AGP back at auto, the locks should work fine without having to mess with the AGP clock.

 

[Pederv]

No it doesn't POST, even thought the Mushkin is ddr 500 @ 3-3-2-8 I have tried the memory divider, still no go. There is no auto in the BIOS, for the AGP, just 66 - 100, currently it's at 66.

 

[Pederv]

After playing a little more, I can get the system to post when I have the HT at 4X and the freq at 249MHz. It will also post with HT at 3X and freq at 250MHz and with the freq at 266MHz. Problem is it hangs right after the 29160 SCSI card lists the hard drives, for all of these settings.
I've left the voltage bump that I needed to get to 10 X 233 in place. I set the memory for the advertised timing and set the memory divider for 166MZ. The CPU multiplier is set at 8X.
Any ideas?

 

[Shimmishim]

The HTT frequency doesn't really have an effect on performance. someone showed using an HT of 1x isn't much different from 4x or 5x.

so just use 3x if it'll boot with that.

 

[Pederv]

Well my system wasn't prime stable at 2333MHz, even when I tried 1.4V on the CPU.
So I went back to the begining, I found what slot my SCSI card needed to be in so that it shared IRQ's with the fewest other devices (IRQ11 - 1 USB port). When I installed the Audigy2 it shared IRQ11, so I have the SCSI, the USB and the audio sharing IRQ11 at the BIOS level. There was a time when doing this added an additional degree of stability.
My prime stress test included running 6 instances of prime, 1 instance of V24.14 for each core running large FFT's, 1 instance of V20.6.1 for each core running the self test, and 2 more instances of V20.6.1 with no affinity set running torture test.
I set the CPU voltage to the default and found that the system fails after 15 hours and doesn't finish the self test at 225 X 10. The system doesn't fail after 24+ hours and completes the self test at 220 X 10.
The memory will run up to 338MHz at 3-3-2-8 1T, acording to memtest 86.
Maybe this jumble of information will help someone.