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zwq1988
07-22-2005, 03:13 PM
My Venice 3500+ and DFI NF4 SLI-D and PQI DDR500 cannot go more than 216 MHz HTT

All friends here, I need your help to solve my problem. I am a hardware newbie and an enthusiastic game player. That is why I bought this computer:


DFI LP UT NF4 SLI-D, nForce4 SLI, S939

AMD Athlon64, 3500+, S939, BOX, Venice

Zalman CNPS7000B-Cu

PQI Turbo DDR500, 2x512MB 3-4-4-8

Asus EN6800GT/2DT/256MB, 6800GT. PCI-E

Maxtor DM10 250GB, SATA, 7200RPM, 16MB

Chill Innovation CP-510A PSU, 510W

ThermalTake SViking, VA4000BWS, Black

winXP SP2, all drivers are the newest ones.


First, I have to say if I knew this forum or read more information before I bought computer, I would buy a better RAM, such as G. Skill. On that time I don’t know how important the RAM is for overclocking. But since I already have it, I wish I can squeeze out all its power.

Unfortunately, this reputed Venice 3500+ can only go to 216 MHz HTT on my DFI NF4 SLI-D mainboard. I show this number 216, because even on 217 winXP will give me a blue screen. I have tried to reduce Multiplier from 11 to 10.5, 10, 9.5, 9 and 8, also increase CPU Voltage to 1.425, 1.45, 1.5, 1.55 and 1.6 v. But no one can do any help. It seems that this CPU’s highest HTT was locked at 216 MHz.

Perhaps PQI Turbo DDR500 is not very good, but I think at least it can run at 250 MHz. Why 216 MHz is the limitation? This RAM’s working voltage is 2.8v. I didn’t change it during overclocking test, since it should be stable until 250 MHz. The detail setup of memory followed the guide from kakaroto (http://www.xtremesystems.org/forums/showthread.php?t=57317 ), as following:

Vddr: 2.8v
Tcl: 3
Trcd: 4
Tras: 8
Trp: 4
Trc: 9
Trfc: 12
Trrd: 2
Twr: 2
Twrt: 2
Trwt: 2
Tref: 3072 (200MHz 3.9us)
Twcl: 1

Bank int.: Enable
Skew control: 255 +
Drive strength: 7
Data strength: 4
Max. Async: 7ns
Read Preamble: 5ns
Idle Cycle: AUTO
Dyn. Counter: Enable
R/W Bypass: 16x
Bypass Max: 7x
32Bit Gran.: Disable


Actually at 216 MHz HTT, this RAM can run 2.5-3-3-7 for most situations. But when I played BF2, the game always crashed to desktop after 5 or 10 mins. If I changed back to 3-4-4-8, BF2 was stable much.

At the current setup: HTT 216 MHz, CPU Voltage 1.4v, Vddr 2.8v, 3-4-4-8, the system is stable enough, on problem to play large games long time. And CPU temperature was at most at 38ºC. Clearly, CPU still has potential to give higher speed. But why it stopped at 216 MHz HTT?

By the way, I wish to make clear what the normal phenomenon of failure overclocking is? When my Venice 3500+ went above 216 MHz HTT, the BIOS check no problem, but it could not go into winXP. Sometime it directly gave a blue screen, and sometime after 1 to 5 mins it gave a blue screen. The information showed in blue screens were different, but most of them were 0*0000000A (IRQL_NOT_LESS_OR_EQUAL), 0*00000050 (PAGE_FAULT_IN_NONPAGED_AREA), or 0*0000008E. It seems that some problems with drivers. I can’t understand, will overclocking bring driver problems?

Waiting for the good answer.
Thank you very much!

Jort
07-22-2005, 03:27 PM
ltd x3?

DZVlad
07-22-2005, 03:33 PM
Try HTT multiplier :) set it to x4 or x3!