An extra 100 MHz not possible?

[Zelig]

DFI LANPARTY nF4 SLI-D (04/06 BTA BIOS)

 

AMD X2 3800+ Toledo LCBQE 0649SPMW

 

4x1024MB OCZ EL DDR PC-3200

 

BFG GeForce 7900 GT OC, 500/800 158.24 drivers

 

2x320GB Seagate 7200rpm SATA hdd

 

SilverStone Zeus ST75SF

 

==========

 

[b]Genie BIOS Settings:[/b]

[color=red]

FSB Bus Frequency.............................  -  280

LDT/FSB Frequency Ratio.......................  -  4x

CPU/FSB Frequency Ratio.......................  -  10x

PCI eXpress Frequency.........................  -  100Mhz



CPU VID StartUp Value.........................  -  1.350v



CPU VID Control...............................  -  1.350v

CPU VID Special Control.......................  -  auto

LDT Voltage Control...........................  -  1.20v 

Chip Set Voltage Control......................  -  1.50v

DRAM Voltage Control..........................  -  2.50v[/color]



[b]DRAM Configuration Settings:[/b]

[color=red]

DRAM Frequency Set............................  -  180=RAM/FSB:09/10

Command Per Clock (CPC).......................  -  Disable

CAS Latency Control (Tcl).....................  -  3

RAS# to CAS# delay (Trcd).....................  -  3

Min RAS# active time (Tras)...................  -  8

Row precharge time (Trp)......................  -  2

Row Cycle time (Trc)..........................  -  10 Bus Clocks

Row refresh cyc time (Trfc)...................  -  12 Bus Clocks

Row to Row delay (Trrd).......................  -  02 Bus Clocks

Write recovery time (Twr).....................  -  02 Bus Clocks

Write to Read delay (Twtr)....................  -  01 Bus Clocks

Read to Write delay (Trwt)....................  -  03 Bus Clocks

Refresh Period (Tref).........................  -  2560

DRAM Bank Interleave..........................  -  Enabled



DQS Skew Control..............................  -  Auto

DQS Skew Value................................  -  0

DRAM Drive Strength...........................  -  Weak 4 (Level 8)

DRAM Data Drive Strength......................  -  Level 1 (50% reduction

Max Async Latency.............................  -  8.0ns

DRAM Response Time............................  -  Fastest

Read Preamble Time............................  -  6.0ns

IdleCycle Limit...............................  -  16 Cycles

Dynamic Counter...............................  -  Enabled

R/W Queue Bypass..............................  -  16 x

Bypass Max....................................  -  07 x

32 Byte Granularity...........................  -  Disable(4 Bursts)

[/color]

==========

 

I was quite pleased to see this chip reach 2.8 GHz on stock voltage, it will actually do 2.8 with a tad under stock, but that's as far as I'm able to get.

 

2.9 GHz seems totally unreachable, I've tried voltages up to 1.525 or so, and nothing is prime stable past a couple of hours at best.

 

Ram tops out just under 270-ish if I loosen the timings a bit, nothing below the 5/6 divider works, so I've been using that to try to clock the cpu up.

 

Dropping the cpu multi doesn't help, the ram dividers don't let me scale as high if I do so, dropping the LDT multiplier doesn't help, I've tried 3x, 2.5x and 1x. Loosening ram timings and/or upping ram voltage doesn't help, though the cpu seems to be the problem, at 2.9 GHz with the memory at 242 MHz, memtest is fine, and small FPUs fail pretty quick. Increasing LDT and chipset voltage by .1 doesn't help, didn't bother trying past that. Temperatures are good, mid-40's with stock voltage, mid-50's with increased voltage.

 

Anything I've forgotten to try?

 

If this is the max for this chip, I'd still be quite happy, 800 MHz with less than stock voltage is great, I just find it strange that an extra 100 MHz seems unatainable with any level of voltage.

[red930]

the low end duel cores seam to stop around 2800

Have you tryed 3 on LDT/FSB ?

[Zelig]

the low end duel cores seam to stop around 2800

Have you tryed 3 on LDT/FSB ?

 

Yes, 3x, 2.5x and 1x all don't do anything useful.

[red930]

yeah 2800 real common

[bldegle2]

4x1024MB OCZ EL DDR PC-3200

 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

 

running with four sticks could be limiting your experience...........

 

laterz

[crazyjv69]

With the LDT voltage at 1.2v your not going to be able to run that HTT at 4x, thats 1120 mhz HTT link speed, run that at 3x for sure!

 

Also why is your dram voltage only 2.5v? Are you kidding? Those sticks should need more like 2.7 - 2.8volts possibly.

 

Is the 2T command rate working?

[Zelig]

With the LDT voltage at 1.2v your not going to be able to run that HTT at 4x, thats 1120 mhz HTT link speed, run that at 3x for sure!

 

Also why is your dram voltage only 2.5v? Are you kidding? Those sticks should need more like 2.7 - 2.8volts possibly.

 

Is the 2T command rate working?

 

4x is working fine at 2800 MHz, with the LDT at 1.3v, 1x, 2.5x and 3x all don't work at 2900 MHz.

 

Ram needs 2.8v for 270 MHz, at 254 Mhz, they're stable with 2.5, have tried up to 2.8 at 2900 MHz, doesn't make a difference. (I didn't expect it to, since the ram is running on a lower divider at 2900 MHz than at 2800 MHz, and memtest passes fine anyway)

 

2T command rate is working fine, 1T doesn't work at even 200 MHz, it might work at lower speeds than that, but I didn't bother trying, for obvious reasons.

 

4x1024MB OCZ EL DDR PC-3200

 

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

 

running with four sticks could be limiting your experience...........

 

laterz

 

My overclocking, possibly, though it would be a memory controller problem, I can't clock the cpu high enough to make the ram error at a 10x cpu multiplier.

 

It's definitely not limiting my overall computer use experience, I routinely use over 3 GB of memory, so any less than I have would slow stuff down a lot.