PS3 PS3 Undervolting Thread

[raidriar]

I created this thread so users can track the experiment of undervolting. Please list your Cell and RSX lithography, starting voltage, and final stable voltage. TLOU title menu should be enough stress to determine a stable voltage. I will go first:

CECHA01 November 2006 - 224 days run time
90nm Cell / 90nm RSX
Default voltages: 1.22V Cell, 1.30V RSX
Undervolt: 1.125V Cell, 1.125V RSX
TLOU Title Menu Temp: 61C Cell / 65C RSX @ 24% fan speed 19 blade after 1 hour

Unfortunately I did not win silicon lottery with this unit. I suspect the long run time before introducing CFW aka running syscon fan curve for so long has degraded the Cell and RSX which is why I cannot hit lower voltages as reported by some other 90nm users

 

[NightLess]

This is one of the coldest Sony refurbished CECHB 40nm Frankenstein I have, it has been running for 43 days, 15-blade Nidec fan,the original voltage of CELL is 1.104v, RSX is 0.965v, this is the stable running voltage and temperature I get, RSX I am not worried about it.

 

[hrist]

Which voltage test points are you probing on mullion/cok-001? Are you probing on +1.0V_BE_VDDC and +1.2V_RSX_VDDC?

 

[NightLess]

Which voltage test points are you probing on mullion/cok-001? Are you probing on +1.0V_BE_VDDC and +1.2V_RSX_VDDC?

Yes, it's done by changing those two voltages via vid.

 

[hrist]

Did some tries today, and i'm really impressed!


CECHB00 90nm rsx with 59 days runtime

Current stats after 20 mins of TLOU:
CELL from 1.205v to 1.078v
RSX from 1.195v to 1.121v

>$ r 3110 2
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
-----------------------------------------------
3E 3C

I undervolted RSX until i got some blinking lights on TLOU's starting screen then went up one step.
I actually stopped going down on the CELL because i found these temps great already!

Will definitelly give it more testing and will try an report later on my CECHAS one 90nm and 40nm.



CECHA00 40nm rsx (sony refurbished) with 169 days runtime

After after 25 mins of TLOU:
CELL from 1.238v to 1.103v
RSX from 0.992v to 0.817v

>$ r 3110 2
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
-----------------------------------------------
3D 0A

PS3 Shutted down while booting TLOU with cell at 00 VID, went two steps up (3D) and it's working fine.
RSX on the minimum VID on the list (0A)

Should voltage be constant over time or it goes down while the CELL/RSX age?

 

[NightLess]

View attachment 45177

CECHA00 40nm rsx (sony refurbished) with 169 days runtime

After after 25 mins of TLOU:
CELL from 1.238v to 1.103v
RSX from 0.992v to 0.817v

>$ r 3110 2
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
-----------------------------------------------
3D 0A

PS3 Shutted down while booting TLOU with cell at 00 VID, went two steps up (3D) and it's working fine.
RSX on the minimum VID on the list (0A)

Should voltage be constant over time or it goes down while the CELL/RSX age?

The voltage will drop at load, my suggestion is increase a little bit voltage in steady state, although this will generate more heat, but you still get good results right?

 

[polyscracker]

Isn't TLoU capped at 30fps? That would also limit the stress test. If I may offer a suggestion: try God of War 3. It's capped at 60fps, but it never actually reaches 60, so it pushes the hardware to its limit more efficiently, IMHO, because it doesn't limit the rendering to 30.

 

[Ganjo]

What do you edit to change the voltages of the CELL?

 

[CrazyRati0n]

I have CECHB00 PS3 with not that big up-time (something around 15-20 days or something), currently I am waiting for soldering station, I will let you know in upcoming days what will be the results of UV my unit

 

[hrist]

What do you edit to change the voltages of the CELL?

The voltage is changed on the SYSCON directly. It would be something like that, tinker it at your own risk of course!

We use the r command to get the current VID (voltage id) values beginning on the 3110 address

>$ r 3110 2
r 3110 2
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
-----------------------------------------------
FF FF

* The first one is the VID for the CELL and the second for the RSX. FF is the default value and the one you should go if you want to rollback any changes.
* You can get get the mullion VIDS here: https://docs.google.com/spreadsheets/d/1ZXKGJ4nKuhRunaJdyHPulb8pyQTF_LKJ
* To change a value on an address you have to use the w command.
* For example, to set both CELL/RSX to 1.1v (3E on the table) we will use:

Cell:

>$ w 3110 3E
w 3110 3E
w complete!

RSX:

>$ w 3111 3E
w 3111 3E
w complete!

We can validate with r we changed the correct values.

>$ r 3110 2
r 3110 2
+0 +1 +2 +3 +4 +5 +6 +7 +8 +9 +A +B +C +D +E +F
-----------------------------------------------
3E 3E

After that you should "fix" the checksum on the 32fe address, if not the console will triple beep and not boot at all.
Run eepcsum and note your four digits on the right of the address.

>$ eepcsum
eepcsum
Addr:0x000032fe should be 0x1478
Addr:0x000034fe should be 0xd535
Addr:0x000039fe should be 0x0f38
Addr:0x00003dfe should be 0x00ff
Addr:0x00003ffe should be 0x00ff

Mine are 1478 (14 78) but yours will probably will be other values. You should write these bytes SWAPPED on the 32fe address.

In my case it would be like these:

>$ w 32fe 78 14
w 32fe 78 14
w complete!

But remember you have to use your own pair of bytes.

* After that you can power off an on the console and it will be using your choosen VID values.

Isn't TLoU capped at 30fps? That would also limit the stress test. If I may offer a suggestion: try God of War 3. It's capped at 60fps, but it never actually reaches 60, so it pushes the hardware to its limit more efficiently, IMHO, because it doesn't limit the rendering to 30.

I was looking if someone did a stress homebrew app or something, found nothing!

 

[polyscracker]

After that you should "fix" the checksum on the 32fe address, if not the console will triple beep and not boot at all.
Run eepcsum and note your four digits on the right of the address.

>$ eepcsum
eepcsum
Addr:0x000032fe should be 0x1478
Addr:0x000034fe should be 0xd535
Addr:0x000039fe should be 0x0f38
Addr:0x00003dfe should be 0x00ff
Addr:0x00003ffe should be 0x00ff

Mine are 1478 (14 78) but yours will probably will be other values. You should write these bytes SWAPPED on the 32fe address.

In my case it would be like these:

>$ w 32fe 78 14
w 32fe 78 14
w complete!

But remember you have to use your own pair of bytes.

* After that you can power off an on the console and it will be using your choosen VID values.



I was looking if someone did a stress homebrew app or something, found nothing!

Just a small correction: in your example to show the checksum fix, there is no need to fix anything. When you run the eepcsum command, you should fix only the bytes that are showing after the "sum" line. In your example, there is no sum message, so there is no checksum to fix.

Also about the stress homebrew app or something similar to that, I think there isn't any due to the fact that most people will not attempt to undervolt or even overclock their consoles. Also undervolt in PS3 is pretty recent. On PC there are plenty of tools for that purpose because it's less risky to do it. And even than it's best to run games instead of dedicated stress apps. A stable overclock might pass a run of a stress app and fail when you run a game.

 

[shnyaps]

Guys, does this work on frankies with volt mod?

 

[NSC-Modz]

Hi Guys ^^

I'm also testing a lot of stuff with undervoltig, wish i have found this thread some hours ago...

I did sadly undervolt the CELL to much, so my ps3 was not able to start again YLOD ^^ I had to figure out my self that i need to fix the 32fe address.

Now all is working again and i want to share my settings with you guys, stable for now.

PS3 CECH-C
No FK Mod
82 days use
Mini IHS Mod. (YouTube: PS3 Mini IHS NSC)
Case Mod.
CFW: Evilnat 4.91 OC Final Edition
Cell: 1.100 v (3E) (uptade 1.0750v) [20]
RSX: 1.1875 v (1B) (update 1.1750v) [3B]

Tested hard on GoW3, on TLOU i was able to get lower RSX voltage, but with GoW3 it freezes.

So GoW3 seems to be a bit harder and need more power.

I'm very lucky with the CELL, Temps dropped about 8-10 °C witch is awesome.

Not so lucky with the RSX, dropped only a bit, but my RSX was always running cool anyway and i got an OC CFW.

My temps before this mod was mostly about 60-64°C on the Cell and 54-56°C RSX in idle with 26% fan speed.

My CELL was always about 10°C hotter than the RSX!

Now it dropped about 8-10°C! I cant believe my eyes!

Please tell us your room temperature, it's very important to compare the Temps.

On GoW3 titel menu after 35min. CELL 52°C RSX 65°C Fanspeed 27%

When closing GoW3 im back directly to:
CELL 52°C / RSX 54°C Fanspeed 25%

After about 5 min. cooling down on XMB:
CELL 50°C / RSX 48°C Fanspeed 25%

Room Temps 19°C

Im sooo damn satisfied ^^

Best Regards
NSC

 

[Charles_n_town]

I don't know if this about temps, but I once had a chat with al-azif, and we both agree - unless you have an early PS3 or 360, don't worry about temps at all. Later PS3, PS4+, are nothing to worry about. After all, are you going to be more concerned about temps than enjoying the game you're playing? I wouldn't be able to play anything if it were me. Systems get hot, that's all you need to know.

 

[NSC-Modz]

I don't know if this about temps, but I once had a chat with al-azif, and we both agree - unless you have an early PS3 or 360, don't worry about temps at all. Later PS3, PS4+, are nothing to worry about. After all, are you going to be more concerned about temps than enjoying the game you're playing? I wouldn't be able to play anything if it were me. Systems get hot, that's all you need to know.

Yeah, some get hot, others get hotter and others runs crazy hot or explode. xD Yeah, we all know Systems gets hot, but you can get it cooler. So why not have a way stable system because it runs cooler? We all know that heat causes problems, some care about, some not, im one of the guys who cares about.

 

[Charles_n_town]

Yeah, some get hot, others get hotter and others runs crazy hot or explode. xD Yeah, we all know Systems gets hot, but you can get it cooler. So why not have a way stable system because it runs cooler? We all know that heat causes problems, some care about, some not, im one of the guys who cares about.

I can understand wanting a cool system. However, it's what stopped me from playing a falcon 360. I couldn't even play the thing so I didn't. It's like why own it then.

 

[NSC-Modz]

I can understand wanting a cool system. However, it's what stopped me from playing a falcon 360. I couldn't even play the thing so I didn't. It's like why own it then.

Yeah, i got you, but it's too late when you already own it ^^

 

[vldru]

Hi Guys ^^

I'm also testing a lot of stuff with undervoltig, wish i have found this thread some hours ago

I did sadly undervolt to much, so my ps3 was not able to start again YLOD ^^ I had to figure out my self that i need to fix the 32fe address.

Now all is working again and i want to share my settings with you guys, stable for now.

PS3 CECH-C
No FK Mod
82 days use
Mini IHS Mod. (YouTube: PS3 Mini IHS NSC)
Case Mod.
CFW: Evilnat 4.91 OC Final Edition
Cell: 1.100 v (3E)
RSX: 1.1875 v (1B)

Tested hard on GoW3, on TLOU i was able to get lower RSX voltage, but with GoW3 it freezes.

So GoW3 seems to be a bit harder and need more power.

I'm very lucky with the CELL, Temps dropped about 7-8 °C witch is awesome.

Not so lucky with the RSX, dropped only a bit, but my RSX was always running cool anyway.

CELL was always about 10°C hotter than the RSX

Now it dropped about 7-8°C! I cant believe my eyes

Please tell us your room temperature, it's very important to compare the Temps.

On GoW3 titel menu after 35min. CELL 52°C RSX 65°C Fanspeed 27%

When closing GoW3 im back directly to:
CELL 52°C / RSX 54°C Fanspeed 25%

After about 5 min. cooling down on XMB:
CELL 50°C / RSX 48°C Fanspeed 25%

Room Temps 19°C

Im sooo damn satisfied ^^

Best Regards
NSC

Hello. My experience of voltage reduction.
cechc08 sell 1E Rsx 1E
cechh08 sell 24 rsx 20
cech3008 sell 63 rsx 7B
cech4208 sell 63 rsx 7B

 

[NSC-Modz]

Hello. My experience of voltage reduction.
cechc08 sell 1E Rsx 1E
cechh08 sell 24 rsx 20
cech3008 sell 63 rsx 7B
cech4208 sell 63 rsx 7B

Nice results, you on OC CFW?

I'm on a OC CFW

I could probably go a bit more down, but it's better to have a bit more than to less.

 

[vldru]

Nice results, you on OC CFW?

I'm on a OC CFW

I could probably go a bit more down, but it's better to have a bit more than to less.

On thick consoles there are CFW, on thin ones there are HEN.
It is impossible to make the voltage lower, I achieved the minimum experimentally.

There are still about 20 thick ps3, different models, I will modify them too.