Q9550-XMS2 1066-UD3R OC help

[knucklez09]

I have a q9550 E0, the newer corsair XMS2 (8500C5C G) 2 x 2 1066 RAM and a Gigabyte Ud3r currently at 3.65Ghz with 1.28125 vcore and everything else auto. the RAM timings are stock 5-6-6-18 and is at 2.1v with the multiplier at 2.40B making the RAM 1032Mhz as close to 1066Mhz as possible. I know for anything more I need to underclock the RAM to 2.00D. I want to get to 4Ghz but know to change more settings like timings and other voltages. what settings should I change to get say... 3.83ghz. I dont really know how to pass where im at stably.
Thanks <!-- / message -->

[Lsdmeasap]

Re: Q9550-XMS2 1066-UD3R OC help

PLEASE Set your own Vtt and PLL, auto gives way to much.

For 3.825 you can try 450 FSB and try 2.40B ram multi for 1080. But what you shold do first is underclock the ram until you find where you want to keep your CPU. Then worry about the ram

But please do set your own voltage, especially Vtt (CPU Termination) and PLL, and for 4Gb of ram you likely need 1.20-1.24 MCH Core voltage as well.

[knucklez09]

Re: Q9550-XMS2 1066-UD3R OC help

ok, what would be a good vcore for 3.825.. Im hoping my 1.28125 is enough. and I heard if I manually set the PLL to 1.5v it helps. my termination is already 1.2v. one more thing, does the ram need any type of tweaking? because I have no idea, besides multiplier, how to adjust timings right.
Thanks

[Conners]

Re: Q9550-XMS2 1066-UD3R OC help

Here's one of my Templates for 3.8GHz. May need to change your ram standard timing control to 5 5 5 18

MB Intelligent Tweaker(M.I.T.) 
Robust Graphics Booster ...............:Fast 
CPU Clock Ratio ...........................:8 X
Fine CPU Clock Ratio.....................:+0.5
CPU Frequency .............................:3.8GHz (450x8.5)
 
Advanced Clock Control                   Press Enter 
CPU Host Clock Control..................:Enabled
CPU Host Frequency (Mhz) ............:450 
PCI Express Frequency (Mhz) ........:100 
C.I.A.2 .................................:Disabled 
 
CPU Clock Drive..........................:800mV 
PCI Express Clock Drive...............:900mV 
CPU Clock Skew (ps)...................:0ps 
MCH Clock Skew (ps)...................:0ps 
 
DRAM Performance Control 
Performance Enhance...................:Standard
Extreme Memory Profile (X.M.P.).....:Disabled 
(G)MCH Frequency Latch...............:Auto 
System Memory Multiplier ..............2.40B 
Memory Frequency (Mhz) ....1066....:1080
DRAM Timing Selectable ................:Manual 
 
Standard Timing Control 
CAS Latency Time.............5........5
tRCD ...............................7........5
tRP'..................................7........5
tRAS...............................24.......15
 
Advanced Timing Control 
tRRD.......................4.................4
tWTR......................4..................4
tWR.........................8.................6
tRFC........................68...............54
tRTP.........................4................4
Command Rate (CMD) .......0........2
 
Driving Strength Profiles 
Driving Strength ........................... OC-1200
 
Channel A 
Static tRead Value...............8........:8  
tRD Phase0 Adjustment.......0.......:Auto
tRD Phase1 Adjustment.......0.......:Auto
tRD Phase2 Adjustment ......0.......:Auto
tRD Phase3 Adjustment.......0.......:Auto
Trd2rd(Different Rank)...........8.......:Auto
Twr2wr(Different Rank)..........8.......:Auto
Twr2rd(Different Rank)...........7......:Auto
Trd2wr(Same/Diff Rank).........9......:Auto
Dimm1 Clock Skew Control...........:Auto
Dimm2 Clock Skew Control...........:Auto
 
Channel B 
Static tRead Value...............8........:8  
tRD Phase0 Adjustment........1.......:Auto 
tRD Phase1 Adjustment....... 0.......:Auto
tRD Phase2 Adjustment .......0.......:Auto
tRD Phase3 Adjustment........0.......:Auto
Trd2rd(Different Rank).......... .8.......:Auto
Twr2wr(Different Rank).......... 8.......:Auto
Twr2rd(Different Rank)........... 7......:Auto
Trd2wr(Same/Diff Rank)..........9......:Auto
Dimm1 Clock Skew Control............:Auto
Dimm2 Clock Skew Control............:Auto
 
Motherboard Voltage Control 
Voltage Type.���... Manual 
CPU
Load Line Calibration......................:Disabled
CPU Vcore�.��.1.25000V...........:1.26875
CPU Termination�..... 1.200V*........:1.200V
CPU PLL������.1.500V*.......: 1.500V
CPU Referennce.��...0.760V*.......: Auto
 
MCH/ICH 
MCH Core�����...1.100V.........:1.280V
MCH Reference�.��.0.760V.........;Auto 
MCH/DRAM Ref.�......0.900V..........:Auto 
ICH I/O�����.....1.500V............:1.570V
ICH Core����...�1.100V............:1.100V
 
DRAM 
DRAM Voltage ��....1.800V..........:2.120V
DRAM Termination .�0.900V...........:Auto 
Channel A Reference 0.900V............:Auto
Channel B Reference 0.900V............:Auto
 
Advanced Settings    
Limit CPUID Max. to 3.....................: Disabled    
No-Execute Memory Protect.................: Enabled  
CPU Enhanced Halt (C1E)...................: Disabled    
C2/C2E State Support......................: Disabled    
x C4/C4E State Support....................: Disabled    
CPU Thermal Monitor 2(TM2) ...............: Enabled   
CPU EIST Function.........................: Disabled    
Virtualization Technology.................: Disabled

[knucklez09]

Re: Q9550-XMS2 1066-UD3R OC help

Thanks Alot, Ill try that when I get a chance

[Psycho101]

Re: Q9550-XMS2 1066-UD3R OC help

As conners Says, your RAM is spec'd at 5-5-5-15, not 5-6-6-18. I have identical RAM and can confirm those timings at 2.1V.

My particular XMS2 will handle up to DDR-1100 OK but much above that is a fail. The XMS range of RAM is usually binned pretty close to its rated speeds and doesn't have that much head room in it. One reason why it's a reasonable price.

The template Connors has given is good. You may need to use diferent vcore and VTT (CPU Termination) as each CPU is different, but those settings are a nice place to work from indeed.

[knucklez09]

Re: Q9550-XMS2 1066-UD3R OC help

no its this RAM Newegg.com - CORSAIR XMS2 4GB &#40;2 x 2GB&#41; 240-Pin DDR2 SDRAM DDR2 1066 &#40;PC2 8500&#41; Desktop Memory Model TWIN2X4096-8500C5C G - Desktop Memory
The timings are a bit different and has better cooling.

anyways, I tried that template and it failed, Im a 3.65 with 1.25vcore 1.22termination 1.50PLL 1.2MCH core RAM 2.1v and everything else auto with the ram at 1032MHz stable. Ill probably stay there. I got into windows at 3.83ghz but failed prime in 10-15 mins

[Conners]

Re: Q9550-XMS2 1066-UD3R OC help

put cpu term back to 1.2 then manually change cpu and MCH reference voltages to .760v. Then go back to CPU Term and set back to 1.22. and give it a whirl on testing.

After that you may need to increase vcore, cpu term, mch term and or mch voltage. Change only one at a time then test or I can walk you through the changes.

Run IBT then P95 small FFT and see it goes.

Oh and set your ram to whats on the side of the stick. (5-6-6-18 @2.1V) You may need to change some of your advanced timings. Can you get us a screenie of memset?

[Lsdmeasap]

Re: Q9550-XMS2 1066-UD3R OC help

Let us know if you need more help by me, looks like you have plenty of support here already though.

Good luck tweaking and like I said if you need my help let me know