8800GT voltage mods

[dinos22]

snip

does your RAM get really got??

also this chip here that you have a heatsink on
is it necessary to be on it as well???

[96redformula]

Wondering here...

Adjust VR and measure voltage while computer is on? Or do you suggest turning it off and then turning VR?

Crown Chants "Turn it off, turn it off"

[Hazaro]

does your RAM get really got??

also this chip here that you have a heatsink on
is it necessary to be on it as well???

[IMG]

I don't have a problem with temps there. I'll whip out my BRAND NEW TEMP PROBE!

brb...

[dinos22]

I don't have a problem with temps there. I'll whip out my BRAND NEW TEMP PROBE!

brb...

lol

i have ram sinks on my ram...smaller copper ones and during ATI tool load they get hot >> you can't rest the finger on the sink for very long....heheheh

i haven't touched that chip though but stock cooler does cover it

[Hazaro]

lol

i have ram sinks on my ram...smaller copper ones and during ATI tool load they get hot >> you can't rest the finger on the sink for very long....heheheh

i haven't touched that chip though but stock cooler does cover it

Ok so here's what I got...

I couldn't get to the front of the card because my the angle... My CM 5 has good airflow With my 8800GT and Accelero S1 Cooler 713/1728/945

Back of card:
MOSFET area: 27C
Random areas: 25C
GPU core area: 27C

Front side:
RAMsink (idle): 31C
Near top of heat pipe (idle): 31C

GPU:
Idle 39C (RivaTuner)

Gonna do load now.

[dinos22]

idle for me is all cool

i get two temp readings in ati tool...top one is core i think with 37-38C idle and 41C load bottom one not sure but it's between 33-36C

but under load the RAM sinks get very hot

phase sinks are cool to touch but they are those bigger blue alu style ones so not sure if it is the sinks or area

[Hazaro]

Load Temps:

Ambient: 23C for both

Back of card:
Memory voltage regulator: 41C
GPU voltage regularor: 37C
Random areas: 33C
GPU core area: 35C

Front side:
RAMsink (load): 41C
Near top of heat pipe (load): 33C

CPU:
Load 48C (RivaTuner)

[dinos22]

i don't see a measurement of RAMsink LOAD temps

also pic of your cooling and what ramsinks you use?

[edit] it's up now

[Hazaro]

i don't see a measurement of RAMsink LOAD temps

also pic of your cooling and what ramsinks you use?

Heh, just copied and pasted the form

Accelero S1 Booyah!

First Ten Pictures
Last Eight Pictures

Just click the first image and hit next to browse them, click on mini image for full picture, 1600x1200

[dinos22]

can you rest your finger on those while loaded on ATI tool

they look big heh

i think i need to find some bigger sinks

[Hazaro]

They are only 106F so, yeah I can.

Anyone got close up pics of their soldering / glue work?

I would really appreciate it.

[Spideroz]

@dinos22
The heatsinks on my ram aren't too hot, around 32° celsius during ati tool test but i put an additional 80mm fan on the top off the vrm heatsink.
For the blue heatsink you circle,this chip was cooled by my stock cooler, so i decided to put a little heatsink on it.

After some test, as i said, i decided to put an additional 80 mm fan on the top of the Vrm heatsink, because without active cooling, they get really really hot after 50 minutes of testing. ( around 78° celsius!!! )
i was a bit affraid when i saw this temp on my infrared thermometer.
The temp of my gpu was 41° and 51° for the card, and VGpu :1.39V (8800Gt@850/1000)

The aditional 80mm fan solve this problem, and with it my Vrm heatsinks are now around 29°, and the card around 36°, much better!!!
The ram like it too and enjoy the active cooling, now i definitely feel better with this temp

I think Vrm need to be properly cooled if you want an high Vgpu, and maybe that's why i can reach 1.4V or more without blackscreen.
Because the heatsink and the 80mm fan are very efficient and keep the Vrm really cool on my card.
that's just a supposition...

[Hazaro]

@dinos22
The heatsinks on my ram aren't too hot, around 32° celsius during ati tool test but i put an additional 80mm fan on the top off the vrm heatsink.
For the blue heatsink you circle,this chip was cooled by my stock cooler, so i decided to put a little heatsink on it.

After some test, as i said, i decided to put an additional 80 mm fan on the top of the Vrm heatsink, because without active cooling, they get really really hot after 50 minutes of testing. ( around 78° celsius!!! )
i was a bit affraid when i saw this temp on my infrared thermometer.
The temp of my gpu was 41° and 51° for the card, and VGpu :1.39V (8800Gt@850/1000)

The aditional 80mm fan solve this problem, and with it my Vrm heatsinks are now around 29°, and the card around 36°, much better!!!
The ram like it too and enjoy the active cooling, now i definitely feel better with this temp

I think Vrm need to be properly cooled if you want an high Vgpu, and maybe that's why i can reach 1.4V or more without blackscreen.
Because the heatsink and the 80mm fan are very efficient and keep the Vrm really cool on my card.
that's just a supposition...

Yeah, the RAM and vRAM regulator seem to be roasting

Gonna move my 80mm so it covers that area.



Since your IR isn't gonna short and jump anything, where else is it much hotter? Let us know.

[Spideroz]

yep vrm run very hot, and the point you circle in red is now the hotest point on my graphic card, around 48° during load on my infrared thermometer.
But without the 80mm fan he was around 65°.

[96redformula]

yep vrm run very hot, and the point you circle in red is now the hotest point on my graphic card, around 48° during load on my infrared thermometer.
But without the 80mm fan he was around 65°.

I have extra swiftech ramsinks on hand. Would it be alright to put one on there?

[Spideroz]

Hi guys, i made some measurements of temperatures on my 8800Gt, to see how the 80mm fan is useful.
All my measurements was made with my 8800Gt@850/1000 Vgpu: 1.38 (full)
The ambient temperature was 20° Celsius

-For my measurements I use this marvellous tool (very useful for overclocking )
http://img152.imageshack.us/img152/8326/dvc02372hn4.jpg

- A pic of the Papst 80mm fan
http://img204.imageshack.us/img204/4...r8800gthm0.jpg


- A picture off my measurement points





I realised all my measurements after 12 min of load with Ati tool.
All these readings are in Celsius degrees.



As you can see the point 1 and 3 seems to be the hottest areas on the card, without active cooling, the point 3 reaches 109° after 12 min of ati tool!!!
I can’t imagine how hot it could be after on or two hours of this test…. In my mind the conclusion should be a nice black screen …

The result show that the 80mm fan is very efficient , it keep the card very cool, and the max temp I found with it still was the point 3, but with only 51.1° this time

I really think this card need an active cooling if you decide to put a water block on it. It should help a lot in your overcloking
I hope these measurements will help you in your overcloking quest
The 8800 Gt is really a great card, thanks to NVIDIA

[Hazaro]

Hi guys, i made some measurements of temperatures on my 8800Gt, to see how the 80mm fan is useful.
All my measurements was made with my 8800Gt@850/1000 Vgpu: 1.38 (full)
The ambient temperature was 20° Celsius

-For my measurements I use this marvellous tool (very useful for overclocking )
http://img229.imageshack.us/img229/4214/dvc02372cu5.jpg

- A pic of the Papst 80mm fan
http://img204.imageshack.us/img204/4...r8800gthm0.jpg


- A picture off my measurement points





I realised all my measurements after 12 min of load with Ati tool.
All these readings are in Celsius degrees.


Idle temp without Load temp without Load with
80mm fan 80mm fan 80mm fan


1 49 98.6 48.7
2 30 40.7 27
3 53.2 109 51.1
4 31 60 33
5 40.9 54.5 35.7
6 32 52.5 33
7 40 59.2 41.8
8 34.8 45.1 35
9 35 65.3 29
10 32 73 26.2
11 28.2 78 43
12 33.8 62.6 43.5

As you can see the point 1 and 3 seems to be the hottest areas on the card, without active cooling, the point 3 reaches 109° after 12 min of ati tool!!!
I can’t imagine how hot it could be after on or two hours of this test…. In my mind the conclusion should be a nice black screen …

The result show that the 80mm fan is very efficient , it keep the card very cool, and the max temp I found with it still was the point 3, but with only 51.1° this time

I really think this card need an active cooling if you decide to put a water block on it. It should help a lot in your overcloking
I hope these measurements will help you in your overcloking quest
The 8800 Gt is really a great card, thanks to NVIDIA

OH MY GOD I LOVE YOU!


Yes, I was just gonna ask you about this, but this is AWESOME!

p.s. have you done the OVP mod?

[Battleneter]

Hi guys, i made some measurements of temperatures on my 8800Gt, to see how the 80mm fan is useful.
All my measurements was made with my 8800Gt@850/1000 Vgpu: 1.38 (full)
The ambient temperature was 20° Celsius

-For my measurements I use this marvellous tool (very useful for overclocking )
http://img229.imageshack.us/img229/4214/dvc02372cu5.jpg

- A pic of the Papst 80mm fan
http://img204.imageshack.us/img204/4...r8800gthm0.jpg


- A picture off my measurement points


I realised all my measurements after 12 min of load with Ati tool.
All these readings are in Celsius degrees.


Idle temp without Load temp without Load with
80mm fan 80mm fan 80mm fan


1 49 98.6 48.7
2 30 40.7 27
3 53.2 109 51.1
4 31 60 33
5 40.9 54.5 35.7
6 32 52.5 33
7 40 59.2 41.8
8 34.8 45.1 35
9 35 65.3 29
10 32 73 26.2
11 28.2 78 43
12 33.8 62.6 43.5

As you can see the point 1 and 3 seems to be the hottest areas on the card, without active cooling, the point 3 reaches 109° after 12 min of ati tool!!!
I can’t imagine how hot it could be after on or two hours of this test…. In my mind the conclusion should be a nice black screen …

The result show that the 80mm fan is very efficient , it keep the card very cool, and the max temp I found with it still was the point 3, but with only 51.1° this time

I really think this card need an active cooling if you decide to put a water block on it. It should help a lot in your overcloking
I hope these measurements will help you in your overcloking quest
The 8800 Gt is really a great card, thanks to NVIDIA

Very nice piece indeed, great work.

I run a 80mm fan in nearly the exact same position but without the Mosphet sinks. I wonder if it is effective enough, any thoughts?


Not sure about what temperature is dangerous for these mosphets. 109C sound very hot, but I am pretty sure some power mosphets are rated to run at several hundred degrees C with no probs. Add in the fact the reference cooler gets dam near burning to touch at that end of the card, so being over 100C on the reference cooler would not surprise me.

[Hazaro]

Very nice piece indeed

I run a 80mm fan in nearly the exact same position but without the Mosphet sinks. I wonder if it is effective enough, any thoughts?

I would think so. I'm at 41C on the vMEM chip (12 minutes ATI load) and it's not even direct air blowing on it. [stock volts]

p.s. It does NOT matter which + or - point goes on vGPU measuring right :P

[largon]

Wondering here...

Adjust VR and measure voltage while computer is on? Or do you suggest turning it off and then turning VR?

No need to turn off the system to tune the VR.
Voltage will follow the VR's setting in realtime.

[Spideroz]

@Hazaro
No i didn't realised the ovp mod, and i have no issues with a Vgpu@1.4V.

For the Vrm i remember those on my X1950Pro could reach 126° before a nice blackscreen, but for the 8800 Gt i have no idea.
I just don't like the idea to have something at 100° on my card.
At 51.1° for the point number 3 i feel much safer and better

And no it doesn't matter for Vgpu measurement you can use both + or -.

[96redformula]

No need to turn off the system to tune the VR.
Voltage will follow the VR's setting in realtime.

Thanks for the correction. I thought he was correcting me or testing me .

[Pacha]

No need to turn off the system to tune the VR.
Voltage will follow the VR's setting in realtime.

I heard tuning VR while system is running isn't that good, so this was wrong then.
could you confirm me that moving vgpu progressively from stock to 1.35V for example (for a 8800 GT), system running, is fully ok?

[Pacha]

Hi guys, i made some measurements of temperatures on my 8800Gt, to see how the 80mm fan is useful.
All my measurements was made with my 8800Gt@850/1000 Vgpu: 1.38 (full)
The ambient temperature was 20° Celsius

-For my measurements I use this marvellous tool (very useful for overclocking )
http://img152.imageshack.us/img152/8326/dvc02372hn4.jpg

- A pic of the Papst 80mm fan
http://img204.imageshack.us/img204/4...r8800gthm0.jpg


- A picture off my measurement points





I realised all my measurements after 12 min of load with Ati tool.
All these readings are in Celsius degrees.



As you can see the point 1 and 3 seems to be the hottest areas on the card, without active cooling, the point 3 reaches 109° after 12 min of ati tool!!!
I can’t imagine how hot it could be after on or two hours of this test…. In my mind the conclusion should be a nice black screen …

The result show that the 80mm fan is very efficient , it keep the card very cool, and the max temp I found with it still was the point 3, but with only 51.1° this time

I really think this card need an active cooling if you decide to put a water block on it. It should help a lot in your overcloking
I hope these measurements will help you in your overcloking quest
The 8800 Gt is really a great card, thanks to NVIDIA

sweet very nice work mate

do the hot points at the back of the card get cooler enough just because the 80mm fan is blowing on the front of it? I mean, would it be better to have a card sandwich do you think, with another fan which lies on the back?

[Battleneter]

sweet very nice work mate

do the hot points at the back of the card get cooler enough just because the 80mm fan is blowing on the front of it? I mean, would it be better to have a card sandwich do you think, with another fan which lies on the back?

I can confirm from mine the back of the card definately gets cooler with the fan blowing onto the front same as above.

Not sure about a Sandwich, using the results shown above there is no need, but I would say it would be cooler.