BSEL Mod on a socket P explained with photos

[zorror]

Ok, I thought the available Vcores were same to every CPU. My L7700 is BGA (soldering) CPU that has been modded into PGA (socket) CPU. I'm trying to achieve 0.75V, at least for the lowest multiplier. My T7100 actually has 0.9625V as it's lowest Vcore, not 0.9500V, I think it varies a little.

1- what happens with VID3 when you set the Vcore in RMclock for multiplier 9x at a value between 1.0000v and below 1.0000v?
L7700 VID3 9x crashes at 0.9V
L7700 unmodded 9x crashes at 0.9125V
L7700 VID3 8x crashes at 0.8500V
L7700 unmodded 8x crashes at 0.8500V

T7100 VID3 9x crashes at 1.0125V
T7100 unmodded 9x crashes at 1.0750V
T7100 8x doesn't crash at all


Here are some temperature readings, I hope they're not too hard to read:
--------------------------------------------------------------------------

L7700 VID3 (Vcore-Temperature-Temperature without mod)

0.8500-49-47
0.8625
0.8750
0.8875
0.9000-50-48

0.9125-55-49
0.9250
0.9375
0.9500-56-50
0.9625
0.9750
0.9875
1.0000-58-51

1.0125-54-52

--------------------------------------------------------------------------

T7100 VID3 (Vcore-Temperature-Temperature without mod)

0.9625-55-53
0.9750-55
0.9875-56
1.0000-57
1.0125-59-56

1.0250-69-57
1.0375
1.0500
1.0625-72-61
1.0750
1.0875
1.1000
1.1125-76-65

1.1250-69-66
1.1375-71
1.1500
1.1625
1.1750
1.1875
1.2000
1.2125-75> and fast rise in temperature

1.2250-75> and much faster rise in temperature

--------------------------------------------------------------------------

From crash voltages and temperatures it seems like the voltages actually rose when they were supposed to decrease. Other temperatures also rose, maybe because of the wire as you said. I tried to tuck the wire into a hole in the socket, but it didn't have any effect on temperatures.

[naton]

are those volatges and temperatures for your highest mutilplier

[zorror]

They are for multiplier 6x (1.2GHz).

[naton]

Hi Mate,

There was a mistake on the photos showing the VoltMod for Socket P. It took me a while to see it. I updated the corrected photos. They are in the first post (page 1).

I have to thank you because without your insistance I wouldn't have spotted the mistake.

That said, please try the mod again and let us know your new temperatures. This time they should be lower.

-------------------------------------------------
You were right with the mistake on the photos you were actually rising the voltage by 0.1v for the voltages below 0.9125 and above 0.9875. The is the mapping for the L7700 with voltage + 0.1v

1.0250 --> 1.1250
1.0125 --> 1.1125
1.0000 --> 1.0000 |
0.9875 --> 0.9875 |
0.9750 --> 0.9750 |
0.9625 --> 0.9625 | those remain the same
0.9500 --> 0.9500 |
0.9375 --> 0.9375 |
0.9250 --> 0.9250 |
0.9125 --> 0.9125 |
0.9000 --> 1.0000
0.8875 --> 0.9875
0.8750 --> 0.9750
0.8625 --> 0.9625
0.8500 --> 0.9500

-------------------------------------------------
L7700 VID3 9x crashes at 0.9V (this is not normal since v = 1.0000)
L7700 unmodded 9x crashes at 0.9125V
L7700 VID3 8x crashes at 0.8500V (this is not normal since v = 0.9500)
L7700 unmodded 8x crashes at 0.8500V

T7100 VID3 9x crashes at 1.0125V (this is not normal since v = 1.1125)
T7100 unmodded 9x crashes at 1.0750V
T7100 8x doesn't crash at all


Here are some temperature readings, I hope they're not too hard to read:
--------------------------------------------------------------------------

L7700 VID3 (Vcore-Temperature-Temperature without mod)

0.8500-49-47 (this is normal since v = 0.9500)
0.8625
0.8750
0.8875
0.9000-50-48 (this is normal since v = 1.0000)

0.9125-55-49 (this is not normal since v = 0.9125)
0.9250
0.9375
0.9500-56-50 (this is not normal since v = 0.9500)
0.9625
0.9750
0.9875
1.0000-58-51 (this is not normal since v = 1.0000)

1.0125-54-52 (this is normal since v = 1.1125)

--------------------------------------------------------------------------

T7100 VID3 (Vcore-Temperature-Temperature without mod)

0.9625-55-53 (this is not normal since v = 0.9625) - (different room temp. maybe)
0.9750-55
0.9875-56
1.0000-57
1.0125-59-56 (this is normal since v = 1.1125)

1.0250-69-57 (this is normal since v = 1.1125)
1.0375
1.0500
1.0625-72-61 (this is normal since v = 1.1625)
1.0750
1.0875
1.1000
1.1125-76-65 (this is not normal since v = 1.1125) (typo maybe... 1.1125-76-75?)

1.1250-69-66 (this is not normal since v = 1.1125) - (different room temp. maybe)
1.1375-71
1.1500
1.1625
1.1750
1.1875
1.2000
1.2125-75> and fast rise in temperature (this is normal since v = 1.3125)

1.2250-75> and much faster rise in temperature (this is normal since v = 1.3250)

[zorror]

You were right with the mistake on the photos you were actually rising the voltage by 0.1v for the voltages below 0.9125 and above 0.9875.

You're saying that the middle Vcores (0.9125v-1.0000V with L7700) stayed the same and outer Vcores (0.8500V-0.9000V and 1.0125V) rose. There must be some logic behind that, but it was evidently the other way around (no difference in room temps or typos). Highest multipliers didn't crash at middle Vcores, which means that they rose. Note too that the middle Vcore temperatures rose much more than the outer temperatures. Same analogy with the T7100 too.

The Vcore range (0.9625V-1.2250V) I posted for T7100 was wrong. It is actually 0.1125V too high for all Vcores (:range is actually 0.8500V-1.1125V). This was because I believed CPU-Z that reported it wrong wrong and not RMClock that reported it right right, because 0.8500V didn't seem believable for standard voltage CPU.

------------------------------------------------------------------------------------------------------------------------

I tried VID3 with L7700 and T7100 with new wire connection and they both worked. They lowered voltages/temperatures at those Vcores that are marked inaccessible at the end of your PDF (0.8500V-0.9000V and 1.0125V-1.1000V), unlike in this picture you posted previously:

Vcores that crashed also confirmed this. Also, I didn't have any other rise in temperatures (due to wire causing listed CPU for example) anymore, at least with L7700.

Does this mean that all CPU's with different Vcore ranges lower at same Vcores in VID3?

---------------------------------------------------------------------------------------------------------------

I also tried VID4 and VID5.

With T7100 (0.8500V-1.1125V) and VID4 my notebook couldn't start booting, so I couldn't even get into BIOS. It started to make beeping noise. I tried the mod twice and used tape insulation (tape put above the wire onto socket).

With T7100 and VID5 my notebook couldn't start booting either. It didn't make beeping noise with this mod.

I think it's strange that both of these crashed before BIOS access, because VID4 should only crash with low Vcore like 9.5000V and VID5 should only crash with high Vcore like 1.1125V. 0.9500V is default Vcore for lowest multiplier and 1.1125V is default Vcore for highest multiplier in T7100, but does CPU's really use both when just starting to boot?

I also tried VID5 to L7700 (0.8500V-1.0125V), which shouldn't alter Vcores at all. I could get into BIOS, but it crashed when it started to load Windows. This might have been because it used IDA/10X multiplier (0.8500V-1.1375V.) when loading Windows. I could get into Windows after disabling Intel Speedstep altogether in BIOS so that it only uses lowest multiplier (with default 0.9500V) but then I couldn't change the multipliers/Vcores in RMClock. Trying to set CPU to use only lowest/highest multiplier in BIOS didn't work.

[naton]

You're saying that the middle Vcores (0.9125v-1.0000V with L7700)

with the error (i.e. when you followed the first tutorial) the above is correct. This is because you were connecting the VID3 hole to a Vss hole, leading to VID3=1 all the time.

There must be some logic behind that, but it was evidently the other way around

VID3 + Vss = 0 (i.e. the error) ----> rises the vcore by 0.1v
VID3 + Vcc = 1 -----------------> decreases the vcore by 0.1v

The Vcore range (0.9625V-1.2250V) I posted for T7100 was wrong. It is actually 0.1125V too high for all Vcores (:range is actually 0.8500V-1.1125V)

Big difference compared to the the T7300. When we tested it in my friend's ACER, the maximum Vcore in RM clock was around 1.2v.

I checked intel's website the maximum for the T7100 is between 1.075V-1.175V (link here)

The T7*** used with socket P support SuperFLA . This why their lowest vcore is 0.8500v. That said all intel's Core Duo, and Core 2 Duo can in theory go as low as 0.7125v. With ViD4 (-0.2v) my T5300 was stable with 0.7500v (not far off the limit of 0.7125v).
--------------------------------

I tried VID3 with L7700 and T7100 with new wire connection and they both worked. They lowered voltages/temperatures at those Vcores that are marked inaccessible at the end of your PDF (0.8500V-0.9000V and 1.0125V-1.1000V), unlike in this picture you posted previously:

Forget about my PDF for now. Are you saying with the corrected VID3 mod:
0.8500V-0.9000V and 1.0125V-1.1000V ---> temperature lower than without the mod.
0.9125V and 1.0000V ----------------------> temperature same as without the mod.
?

Does this mean that all CPU's with different Vcore ranges lower at same Vcores in VID3?

Either VID3, VID4 or else, the minimum and maximum vcores you can use depend on the range of voltages that your cpu have access to. The wider the range is before mod, the wider it is after mod.

For instance the minimum I could use with my T2060 with VID4 was 0.8250v, because the minimum without the mod was 1.0250v.
-----------------------------------------------------------------

With T7100 (0.8500V-1.1125V) and VID4 my notebook couldn't start booting, so I couldn't even get into BIOS. It started to make beeping noise. I tried the mod twice and used tape insulation (tape put above the wire onto socket).

I was going to tell you to test the VID4 with your L7700 a while ago. The reason I didn't was because with the mod your CPU would have booted with multi. x9 with a vcore = 0.8250v (1.0250 - 0.2), and with those settings it would have crashed when loading Windows.

For the T7100. Did you reset RMclock before doing the VID4 mod? I mean did you increase the Vcore to 1.1125v for all the multipliers before attempting the mod?

Technically speaking your laptop should at least have booted into the BIOS with this setting. This is because VID4 doesn't modify you maximum Vcore of 1.1125v. The voltage mapping in the case of the T7100 + VID4 (-0.2v) is:

1.1125v ----------------> 1.1125v (same)
0.9125v to 1.1000v -----> 0.7125v to 0.9000v
0.8500v to 0.9000v -----> 0.8500v to 0.9000v (same)

With T7100 and VID5 my notebook couldn't start booting either. It didn't make beeping noise with this mod.

Not sure why it didn't start at all. In my case it booted to the BIOS screen, and crashed while trying to load windows.
The only thing that I can thing of is that intel has added a feature to their CPUs to stopped them from working when the voltage is too low. They probably did this when they made the move from socket M to socket P.

I also tried VID5 to L7700 (0.8500V-1.0125V), which shouldn't alter Vcores at all. I could get into BIOS, but it crashed when it started to load Windows. This might have been because it used IDA/10X multiplier (0.8500V-1.1375V.) when loading Windows. I could get into Windows after disabling Intel Speedstep altogether in BIOS so that it only uses lowest multiplier (with default 0.9500V) but then I couldn't change the multipliers/Vcores in RMClock. Trying to set CPU to use only lowest/highest multiplier in BIOS didn't work.

You might be right. It could be IDA that is making impossible for the L7100 to work with VID5.
From what I have read is that IDA doesn't kick in automatically. By this I mean that it works only when a certain set of condition is meat... in other words never.

THANKS MATE for the tests, as it is helping everyone reading this thread to figure out what they can and what they can't do with their laptops and CPUs.

QUESTION:
What was the different in temperature before and after VID3?
Can you remove the photos from this post so readers don't get confused... thanks

[naton]

Has any one tried the BSEL mod on a laptop with an nVidia chipset?

Guys the experiments I did with socket P were in my friend's laptop. I'm planning to upgrade my laptop soon. I'm planning to buy something cheap/second hand, upgrade it with a T7300, and force the T7300 to run at 2.66Ghz via BSel mod.

So, for that I'm looking at buying a laptop with a Socket P that can use an FSB of 266mhz, an ATI chipset and a 14.1" (1280x800) screen. Any suggestions?

[zorror]

VID3 + Vcc = 0 ---------------------> gives you the table below
VID3 + Vss = 1 (i.e. the error) -------> gives you the opposite of the table below. I mean that any vcore that had an initial VID3 = 1 will stay the same, and any one that had VID3 = 0 will see its volatge increased by 0.1v.

Isn't it supposed to be (at least before, i.e. in the PDF):
VID + Vcc = 1
VID + Vss = 0

The pinmod results would also tell this. This would explain why you think my incorrect (Vss) pinmod gave strange results and my correct pinmod (Vcc) gave "opposite" (not like in the table for L7700) results.

Big difference compared to the the T7300. When we tested it in my friend's ACER, the maximum Vcore in RM clock was around 1.2v.

Actually the maximum in my T7100 is 1.1750V and higher for IDA. With this Vcore range (0.8500V-1.1125V) I was just referring to the Vcores in this post (since I didn't post temperatures for higher Vcores).

Forget about my PDF for now. Are you saying with the corrected VID3 mod:
0.8500V-0.9000V and 1.0125V-1.1000V ---> temperature lower than without the mod.
0.9125V and 1.0000V ----------------------> temperature same as without the mod.
?

Yes exactly.

For the T7100. Did you reset RMclock before doing the VID4 mod? I mean did you increase the Vcore to 1.1125v for all the multipliers before attempting the mod?

Yes I set them 1.1125V. But doesn't RMClock Vcore settings work until Windows loads it after the login? It could have used 0.9500V Vcore before this.

THANKS MATE for the tests, as it is helping everyone reading this thread to figure out what they can and what they can't do with their laptops and CPUs.

No problem, thank yourself. I have spent a lot of time trying to figure out how to make my notebook silent/cool as possible. I even bought another temporary notebook to test low voltage CPU's and now, mods like this because I can't test with my current notebook (for irrelevant reasons). Before reading and testing this I really didn't believe nobody would find out how to get lower voltages than the Vcores Intel had decided, because C2D brand had been out for so long (Pentium M had much lower minimum Vcores).

I will have a lot of use for these mods, especially if I'm able to get lower than 0.1V, since a little newer CPU's like T9X00 and T8X00 have higher 0.90V-0.95V minimum Vcore.

What was the different in temperature before and after VID3?

Not a huge temperature drop for this LV CPU but still very meaningful for me in making silent/cool notebook. I can notice a big difference in temperature at keyboard under palms between 45C and 50C.

L7700 VID3: Vcore(V)-Temperature(C)-Temperature without mod(C)

1.0125-49-52

1.0000-52-52
0.9875
0.9750
0.9625
0.9500
0.9375
0.9250
0.9125-49-49

0.9000
0.8875
0.8750
0.8500
0.8625
0.8500-45-48
------------------------------------------------------------

Is it possible to use multiple different VID mods at a time to get lowered voltages at different Vcores and in bigger decreases?

[naton]

Isn't it supposed to be (at least before, i.e. in the PDF):
VID + Vcc = 1
VID + Vss = 0

Correct. I corrected the typo in the previous post. I also added a new photo to show the change in voltage for both cases.

Yes I set them 1.1125V. But doesn't RMClock Vcore settings work until Windows loads it after the login? It could have used 0.9500V Vcore before this.

Correct.

I even bought another temporary notebook to test low voltage CPU's and now, mods like this because I can't test with my current notebook (for irrelevant reasons).

I actually did the same. My main laptop is a Gateway laptop (socket M). I bought an Eisystem laptop (socket M), just to test the voltmod.
I coudn't test the FSB mod on the Eisystem because it had an intel chipset. So I sold it.
I didn't do any voltmod in my gateway not because I don't want to but because I can't. The reason is that I pushed the FSB of my T2500 from 166 to 200Mhz. So now my T2500 is running at 2.4 Ghz instead of 2.0 Ghz.
Before the mod my T2500 @ 2Ghz was stable with 1.05v. At 2.4Ghz this CPU needs 1.225v to run stable so no volt mod. That said I'm lucky because the range of voltage available for this CPU is from 0.95v to 1.25v, otherwise I would have had to do a overvolt to get it stable.
I also tried the FSB mod with my T5300. I modded the FSB from 133 to 200Mhz (i.e. 1.73Ghz to 2.6Ghz). The problems I run into were:
1- Even with VID1 (+0.025v) the T5300 was not stable under Orthos. The voltage range of the T5300 is small compared to the T2500. Without voltmod the maximum is 1.1750v. With VID1 (+0.0250v) the maximum go up to 1.2v. To make the T5300 I needed at least VID2+ (+0.05v).
2- The temperatures were amazingly high under load (@ 2.6Ghz). I don't know the maximum, because the CPU was not stable, but I saw 82-83c before it crashed.
3 -With the T2500 @ 2.4Ghz I hit 76c under load. I think that this is OK because most of the time I keep the T2500 locked @ 1.2Ghz, with temperatures around 35 to 40c.

Not a huge temperature drop for this LV CPU but still very meaningful for me in making silent/cool notebook

From my experience with the FSB mod on the T2500 and the T5300, changes in temperature are more noticable when reducing the voltage for the highest multipliers.

Is it possible to use multiple different VID mods at a time to get lowered voltages at different Vcores and in bigger decreases?

Yes you can, but the problem is you'll be reducing the number of vcores accessible to your CPU even further.
For intance, if you add VID2 + Vcc to you VID3 + Vcc, you'll be undervolting by 0.15v. With this mod, your L7700 will have access to only the following voltages:
0.9125v to 0.9500v and
0.7125v to 0.7500v

[naton]

With T7100 (0.8500V-1.1125V) and VID4 my notebook couldn't start booting, so I couldn't even get into BIOS. It started to make beeping noise. I tried the mod twice and used tape insulation (tape put above the wire onto socket).

you said that the maximum vcore for you T7100 is 1.1750v. Both VID3 (-0.1v) and VID4 (-0.2v) have no effect on this value. So your laptop should start and load windows normally with VID4.

What's voltage for IDA? is it above 1.3v? What's the T7100 frequency when IDA is activated? 2Ghz?
Voltages between 1.3125v and 1.5000v + VID4 (-0.2v) ------> between 1.1125v and 1.3000v.
Surely your T7100 shoudn't have any problems running stable with a minimum of 1.1125v @ 2Ghz!