Soldato
- Joined
- 12 Jan 2006
- Posts
- 2,547
This is my first attempt at memory oc'ing so be gentle 
I worked out my max fsb so now its down to getting the memory up to speed
FSB Bus Frequency 280Mhz
LDT/FSB Frequency Ratio x3
CPU/FSB Frequency Ratio x9
PCI-Express Frequency 101Mhz (pci lock)
CPU VID Control 1.4v
Decreased the Multi to x7 to remove it from the loop.
The default settings for my ram are as follows:
Samsung UCCC 2.5-3-3-6 2.6 ~ 2.75 V
So i thought finding my best timings would be a good place to start, so i reduced the FSB to 200Mhz to take that out the loop.
1) Reduced CAS to 2. result: Wouldn't reach the memtest without rebooting
So i put it back to 2.5
2) Reduced tRCD to 2, tRAS to 8 (2.5+3+2 cycles) result: System no longer booted
Reset the CMOS and loaded the last good settings (2.5-3-3-6)
3) Reduced Trp to 2, increased tRP to 8 (6+2), result: Crashed on memtest
Used hotkey to restore to last saved settings.
I increased the volts to 2.8 but it made no difference.
Conclusion: Memory wont take any lower timings.
Now to work out the max FSB on the timings 2.5-3-3-6, starting from a reasonably low number (230Mhz) i ran memtest (test 5) to check for inital stability. Increasing in 5 mhz increments until system became unstable increasing the volts to 2.8 (from reading around i found the ram was best oc'd at a slightly higher voltage i.e 2.7/2.8).
At 245 Mhz i began getting memory errors, so went in 1 mhz increments from 240 Mhz.
Memtest Max: 243Mhz
FSB Bus Frequency 243Mhz
CPU/FSB Frequency Ratio x7
PCI-Express Frequency 101Mhz
Dram Frequency Set(Mhz) 200
Command Per Clock(CPC) enable
CAS Latency Control(tCL) 2.5
RAS# to CAS# Delay(tRCD) 3
Min RAS# Active Timing(tRAS) 6
Row Precharge Timing(tRP) 3
Will run Super Pi tomorow.
Next i will play with set the other RAM timings to create a default to work from using "stable" settings for all options and tweak them 1 by 1 and see if i can get the fsb up a bit.
Any suggestions for improvements to what i am doing so far? or am i roughly on the right track.
Tnx
I worked out my max fsb so now its down to getting the memory up to speed
FSB Bus Frequency 280Mhz
LDT/FSB Frequency Ratio x3
CPU/FSB Frequency Ratio x9
PCI-Express Frequency 101Mhz (pci lock)
CPU VID Control 1.4v
Decreased the Multi to x7 to remove it from the loop.
The default settings for my ram are as follows:
Samsung UCCC 2.5-3-3-6 2.6 ~ 2.75 V
So i thought finding my best timings would be a good place to start, so i reduced the FSB to 200Mhz to take that out the loop.
1) Reduced CAS to 2. result: Wouldn't reach the memtest without rebooting
So i put it back to 2.5
2) Reduced tRCD to 2, tRAS to 8 (2.5+3+2 cycles) result: System no longer booted
Reset the CMOS and loaded the last good settings (2.5-3-3-6)
3) Reduced Trp to 2, increased tRP to 8 (6+2), result: Crashed on memtest
Used hotkey to restore to last saved settings.
I increased the volts to 2.8 but it made no difference.
Conclusion: Memory wont take any lower timings.
Now to work out the max FSB on the timings 2.5-3-3-6, starting from a reasonably low number (230Mhz) i ran memtest (test 5) to check for inital stability. Increasing in 5 mhz increments until system became unstable increasing the volts to 2.8 (from reading around i found the ram was best oc'd at a slightly higher voltage i.e 2.7/2.8).
At 245 Mhz i began getting memory errors, so went in 1 mhz increments from 240 Mhz.
Memtest Max: 243Mhz
FSB Bus Frequency 243Mhz
CPU/FSB Frequency Ratio x7
PCI-Express Frequency 101Mhz
Dram Frequency Set(Mhz) 200
Command Per Clock(CPC) enable
CAS Latency Control(tCL) 2.5
RAS# to CAS# Delay(tRCD) 3
Min RAS# Active Timing(tRAS) 6
Row Precharge Timing(tRP) 3
Will run Super Pi tomorow.
Next i will play with set the other RAM timings to create a default to work from using "stable" settings for all options and tweak them 1 by 1 and see if i can get the fsb up a bit.
Any suggestions for improvements to what i am doing so far? or am i roughly on the right track.
Tnx
