Testing / comparing : Intel D975XBX2 / Asus P5B DX ***56K WARNING***

[gtj]

Just a quick followup

Power slope adds a small bump in vcore at a given bios setting..sort a in between value...does nothing for vdroop

Values tested with DMM

No power slope
Bios setting.....Bios reading......winxp idle/load........DMM idle/load
1.525v ........1.511-1.523.....1.51-1.52v/1.51......1.47/1.46

Power slope on
Bios Setting......Bios reading......winxp idle/load.......DMM idle/load
1.5375 ............1.54v ...........1.55-1.54..........1.49v
1.5625 ............1.57v ...........1.57v/1.56v.......1.52v/1.51v

I used Speedfan to report idle/load winxp pro values(everest is the same)

@1.5375 P95 blend failed immed and I could not get a load temp..I was using blend....
@1.5625 P95 blend generally gave a load 1.52 with a few at 1.51v..small fft gave 1.56v

So Powerslope seems to give a bit more juice and vdroop ON MY board with bios 2333 is excellent at .01(better than Intel specs? of 0.02-0.05)

But my bios reports vcore much higher than actually..typically .05v close to what Rick fx saw way back in the thread

Also the software programs seem to pull data very accurately from the bios ..they read the same

So if you have a DMM measure the vcore if you can...others have reported only .01-.02 difference between bios and actually values

Your DMM reading are unusual. Try measuring your +5v and +12v with your DMM then compare it to what the BIOS or other programs read.

[nealh]

Your DMM reading are unusual. Try measuring your +5v and +12v with your DMM then compare it to what the BIOS or other programs read.

why would you say that...
Rickfx got very similar result

my board is revision 505....
PSU= Corsair HX620W..brand new for this build


EDIT:

Lome...thank you works like a charm

Gtj

Well I tested everything with my DMM

BIOS Readings
12v= 12.375
5v= 5.058
3.3v= 3.353
1.5v= 1.607
Vcore= 1.535

DMM Reading
12v= 12.10v
5v= 5.00v
vcore= 1.49v

[gtj]

why would you say that...
Rickfx got very similar result

my board is revision 505....
PSU= Corsair HX620W..brand new for this build


EDIT:

Lome...thank you works like a charm

Gtj

Well I tested everything with my DMM

BIOS Readings
12v= 12.375
5v= 5.058
3.3v= 3.353
1.5v= 1.607
Vcore= 1.535

DMM Reading
12v= 12.10v
5v= 5.00v
vcore= 1.49v

Bingo. Your DMM reads low or your sensor chip reads high. I'm betting it's the DMM.

[nealh]

Bingo. Your DMM reads low or your sensor chip reads high. I'm betting it's the DMM.

why would you say the DMM is wrong..I tested numerous batteries and they all read correct voltages not low

Hmm..this is not good if your correct
if my DMM is wrong and the bios is correct..then the BAdaxe2 needs alot more vcore vs the RD600

ok..I guess I will go buy another DMM and see waht happens

If my vcore really is idling at 1.53/1.54v and loads at 1.52v...then an idle temp of 40/42C with ambient of 24.5C is amazing on e6600

[nealh]

Bingo. Your DMM reads low or your sensor chip reads high. I'm betting it's the DMM.

Ok..I have not gone back to the BIOS readings

I bought a second DMM(sears has a nice one for $12)
http://www.sears.com/sr/javasr/produ...TOOL&ihtoken=1

I tested both DMM on batteries(gave exact same readings on AAA/AA?C batteries) and my system

From post #3338..I cant recall but I may have used a molex that was fan only as a ground and with both DMM this gave a reading of 1.46/1.47v underload

From my previous post:
BIOS Readings(vcore set as 1.525v with powerslope enabled)
12v= 12.375
5v= 5.058
3.3v= 3.353
1.5v= 1.607
Vcore= 1.535


DMM #1 Reading (hmm now that I think about it, I was using a molex adapter from attached to the 4 pin that went into GPU molex on the mobo)
12v= 12.10v
vcore= 1.49v

I have a 4pin molex cable with 2 plug one into the gpu molex on the mobo...I had previously used the free one with a molex adapter so I could see color of the wires..the cable on the HX620w are all black

so this time no adapter just used the 4pin molex and I used one of the inner plugs as ground...tested 12v line DMM #1 ..12.10/12.09v...new DMM 12.13v

OK so grounded and test at the same power choke..upper left one in pic from Gtj link
Bios 2333
Powerslope enabled
vcore 1.525v as bios setting
load is P95 v251 blend

speedfan 4.32 .... reads idle of 1.54v/load 1.53v
DMM #1
1.50v idle/1.50v load

New DMM
1.50v idle/1.50v load

so the difference vs speedfan is .03/.04 this time

so unless both DMM are bad...I am pretty happy my DMM readings are accurate

[gtj]

I bought a second DMM(sears has a nice one for $12)

so unless both DMM are bad...I am pretty happy my DMM readings are accurate

It isnt out of the realm of possibility that the sensor chip isn't calibrated correctly. and as long as you're happy, that's all that counts.

[nealh]

It isnt out of the realm of possibility that the sensor chip isn't calibrated correctly. and as long as you're happy, that's all that counts.

Hey for $12(reg price is $25), if my first DMM was bad...I needed a new one anyway

I am only happy that my DMM readings are pretty accurate(or I have terrible luck and both are bad) and it appears the mobo sensor is off, I am not happy about this if it is true..but what can I do to fix that... RMA the board ...no thanks..that's way too much of a pain in the A$$ since I was using this as a replacement board, already for a crappy RD600