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foodfightr

X2 3800 OC Questions

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FSB Freq: 270

LTD/FSB Ratio: x4.0

CPU/FSB Ratio: x10

K8 Cool/Quiet: Disable

CPU VID Startup: 1.550

CPU VID Control: 1.475

CPU VID Special: Above VID * 110%

LDT Voltage: 1.20

ChipSet Voltage: 1.50v

DRAM Voltage: 2.80

 

DRAM Config:

DRAM Frequency Set: 200(DRAM/FSB:1/01)

Command Per Clock: enable

CAS Latency: 3.0

RAS# to CAS# delay 03

Min RAS Active Time 08

Row Precharge 03

Row Cycle 12

Row Refresh 18

Row to Row 03

 

 

... I am getting tired typing - is this enough info? Of course your mileage may vary as I understand it, no two chips are quite the same....

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Guest xen0

Is that much voltage safe (1.475 * 1.1 = 1.6225v!)? I'm kind of nervous about going any higher than the 1.525 volts i'm testing the cpu limits with right now.

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The mother board monitor shows 1.58v - not sure which value is most accurate though. I have been running this way for several weeks with no ill effects. However I don't usually run the cpus flat out at 100% for long periods of time, in the course of normal operation, so I don't generate the extra heat that the higher voltage produces, often. If I lower the voltage Prime fails - can't have higher speed without the heat :(

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Guest ElAguila

I use my x2 3800 for video/audio editing/encoding. I ran some real world test at 10x260, 9x289, 8x325. The best performance was obtained when I used the highest cpu multi and the tightest memory timings. I would definitely go with the 10x260 setting. Which memory are you using that you can do the 260Mhz (2-3-2-5) timings? Also for this chip 2.6 is a good overclock. The stock speed is 2.0 so at 2.6 you are getting a 30% increase.

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I'm building a system around an X2 3800. I've seen this CPU cap out at around 2.6Ghz. Would I be better off purchasing ram with very tight timings at 260Mhz (2-3-2-5) as opposed to say, ballastix (3-3-3-8, but higher frequency potential.) Is the ballastix really neccesary seeing as I won't be able to get the CPU as fast as the ballastix would like to?

 

Also, do you think watercooling will be neccesary? It seems like 2.6 is a moderate overclock.

 

All that RAM fiddling is pretty much useless for actual application performance. I don't like the Ballistix quite that much anyway, and it is certainly not worth the money all you want is good application performance.

 

To reach 2.6 you will probably still be facing volts that you have to raise with that CPU. I don't think watercooling brings you much further unless you are willing to bring in some very high volts.

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The mother board monitor shows 1.58v - not sure which value is most accurate though.

 

The sensors are trash.

 

According to my measurement the DFI boards volt pretty precise, if you say 1.65 V in the BIOS that is what you get into your CPU.

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Yes you are right, the sensors are off quite a bit. I just measured Vcore using a voltmeter, and it reads 1.62 which corresponds exactly with the bios configured value of 1.475 * 110%. The mbm reads 1.57.

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