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I picked up this 2.3GHz heatsink with the processor card still installed from eBay. On the lookout for another one but I’m not sure how I’d go about modifying it since I don’t have the proper tools. Might have to take them to a machine shop or something.

View attachment 1728413
I’m actually considering just putting it on one of my 2.5GHz cards as is and running a single processor for the time being. Might end up being faster since I’ve been running the quad in reduced mode anyway to keep the fan noise down. The LCS can still keep the temps mostly under control in automatic mode but it has to run the fans at near full blast during anything intensive.
Noice! that Definitely wouldn’t be a bad idea to do that for the time being. The job can mostly be done with a sawzall and a decent metal file. Just takes some patience. However if a machine shop could do it it for a feasible price that would be the best route however it would probably be difficult to find one that would have the equipment that would want to do such a job for a private customer. Most that would have machinery like that wouldn’t wanna touch em and if they did they’d charge an astronomical price. But I’d love to be proven wrong in this aspect. Hopefully you can find one. 🤞
 
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Noice! that Definitely wouldn’t be a bad idea to do that for the time being. The job can mostly be done with a sawzall and a decent metal file. Just takes some patience. However if a machine shop could do it it for a feasible price that would be the best route however it would probably be difficult to find one that would have the equipment that would want to do such a job for a private customer. Most that would have machinery like that wouldn’t wanna touch em and if they did they’d charge an astronomical price. But I’d love to be proven wrong in this aspect. Hopefully you can find one. 🤞
Machine shops that make injection molds usualy have wire edm. Ask nicely :)
 
@Wizzlemane96

Did the test. Maximum fractal count. It doesnt go over 70c (room temps is 21.5c)

I dont know how the original lcs handle this task but I’m happy with it. 😁 Thats a good stess test imo heyhey.

Also I use Renoise 2.7.2 more and more and its cross compatible between my G5 running 10.5 and my macpro still under 10.11

9DC3B4B0-CFA8-43B6-B4BF-492A14E6559E.jpeg


I forgot to ad idle temp. Cpu B is notably hotter (not something hard to fix).
48FFE06A-5E57-4E6E-8DDD-8C15531D3C70.jpeg
 
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I have a G5 quad - how much can someone do air cool for mine ?? I don’t want to mess with it myself.. I can take apart most Macs, except for G5’s.
 
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I have a G5 quad - how much can someone do air cool for mine ?? I don’t want to mess with it myself.. I can take apart most Macs, except for G5’s.
@Wizzlemane96 did it without special tools. Check out what he did. Theres another guy that was sucessfull with 2004 heatsink (no cutting).

Nice kitty you got there 😌
 
How high is the power consumption of each core ? I'm thinking that ibm pushing the 970mp to 2.5 was a terrible thing to do efficiency wise . I'm considering doing your air cool mod but with two dual 2.0 cpus instead. 80% of the performance with just above half the power consumption of the quad 2.5! Right now i'm using a dual core cpu (2.0) on my quad and doing the same test with temps peaking around 70-75 the fans barely go above idle speeds, under 900-1000rpm most of the time under full load. Max power for each core is 34 watts .
 
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How high is the power consumption of each core ? I'm thinking that ibm pushing the 970mp to 2.5 was a terrible thing to do efficiency wise . I'm considering doing your air cool mod but with two dual 2.0 cpus instead. 80% of the performance with just above half the power consumption of the quad 2.5! Right now i'm using a dual core cpu (2.0) on my quad and doing the same test with temps peaking around 70-75 the fans barely go above idle speeds, under 900-1000rpm most of the time under full load. Max power for each core is 34 watts .
That could be great. I thought of this too. I think I have two 2.3 cpu or maybe I'm mistaken and have only 1x2.3 and 1x2.0 (I should check with the part number) My quad is not noisy, only when it is pushed it to the limit. Anyway, thats a great idea.

Regarding fan speed. When I play Prey 2006 with maxed graphics in 1080p, the quad is still quiet. With audio, it is also quiet. The only case when fan could rev high could be with video rendering maybe ?
 
@Nikolaosth

I really dont know about power consumption... Using slower cpu could extend the life span of the power supply tho.
 
Oh ok. Oh well. I hear Canada is nice country and now better than USA ?
Dont know about that. USA is still the land of the free. Since covid, we have seen that it is quite easy to loose our freedom. Oherwise, yes Canada is a nice country.

In Ukraine, you got the best looking women :D Lucky you.
 
@Wizzlemane96

Did the test. Maximum fractal count. It doesnt go over 70c (room temps is 21.5c)

I dont know how the original lcs handle this task but I’m happy with it. 😁 Thats a good stess test imo heyhey.

Also I use Renoise 2.7.2 more and more and its cross compatible between my G5 running 10.5 and my macpro still under 10.11

View attachment 1735260

I forgot to ad idle temp. Cpu B is notably hotter (not something hard to fix). View attachment 1735278
Your idle temps are great! Mine always idle around 45c.

I plained my heatsink surface on my cpu b heatsink it seemed to stabilize the temps just a hair better. Approximately 2c less under load same idle.
537218EE-9E04-4309-AC18-4E055F083646.jpeg
19F29F1B-7A07-4BB4-B05A-E88CE2E4FC81.jpeg


Next I’m going to thermal calibrate it and I’ll experiment with the air cooled fans to see if they make a difference as well. I am still using the 7 blade stock quad rear fans vs the 3 blade deeper air cooled fans. Theoretically I figured the 7 blade would be more beneficial in the tighter quarters because it creates more static pressure. On the air cooled ones they have their VRM heat sink on the side and have a lot more open space with only 1 CPU which would make airflow way easier. Hence the low static pressure higher airflow 3 blade fan. I report my experiments once I try!
 
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Your idle temps are great! Mine always idle around 45c.

I plained my heatsink surface on my cpu b heatsink it seemed to stabilize the temps just a hair better. Approximately 2c less under load same idle.View attachment 1735865View attachment 1735866

Next I’m going to thermal calibrate it and I’ll experiment with the air cooled fans to see if they make a difference as well. I am still using the 7 blade stock quad rear fans vs the 3 blade deeper air cooled fans. Theoretically I figured the 7 blade would be more beneficial in the tighter quarters because it creates more static pressure. On the air cooled ones they have their VRM heat sink on the side and have a lot more open space with only 1 CPU which would make airflow way easier. Hence the low static pressure higher airflow 3 blade fan. I report my experiments once I try!
Thats super cool. Let me know the end result. I still run 3 blades fan in the back and maybe I could revert back. Lapping the block make sense ! Good work sir 👍
 
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Your idle temps are great! Mine always idle around 45c.

I plained my heatsink surface on my cpu b heatsink it seemed to stabilize the temps just a hair better. Approximately 2c less under load same idle.View attachment 1735865View attachment 1735866

Next I’m going to thermal calibrate it and I’ll experiment with the air cooled fans to see if they make a difference as well. I am still using the 7 blade stock quad rear fans vs the 3 blade deeper air cooled fans. Theoretically I figured the 7 blade would be more beneficial in the tighter quarters because it creates more static pressure. On the air cooled ones they have their VRM heat sink on the side and have a lot more open space with only 1 CPU which would make airflow way easier. Hence the low static pressure higher airflow 3 blade fan. I report my experiments once I try!
a liquid metal thermalpaste could possible shave another 1-2C off if someone is darring enough !
 
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Ok so update! I tried both sets of fans and with the 3 blades in there my temps were indeed slightly worse! My cpu a climbed to 71c and cpu b went to 76c! I reinstalled the 7 blades and did the thermal calibration. Since my old LCS is laying in pieces at my shop I figured I’d experiment and I can now confirm you can just use only the pump to thermal calibrate the machine it doesn’t need to be under load or anything like that it can just free spin outside the machine.
CB31160D-DDCD-4D37-A17B-46BFC5DB99F9.jpeg

CCDA78E5-3F28-4E62-9915-D159D8586652.jpeg

The end result is a little better but not by much. They do seem to run closer to the same temp but they aren’t really any lower.

Here is a video showing the sound of the of the fans and the temps after 20 minutes of power fractal.

 
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a liquid metal thermalpaste could possible shave another 1-2C off if someone is darring enough !
That is probably very likely! I personally don’t really like that stuff because it’s so dang messy. I’m using good ol artic silver 5. Been using that stuff forever since I was 12 years old. I’m aware of the more modern pastes and their benefits though. Some day I’ll try it on another project. I can’t get anything besides artic silver 5 locally. I’d have to order anything else online.
 
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Ok so update! I tried both sets of fans and with the 3 blades in there my temps were indeed slightly worse! My cpu a climbed to 71c and cpu b went to 76c! I reinstalled the 7 blades and did the thermal calibration. Since my old LCS is laying in pieces at my shop I figured I’d experiment and I can now confirm you can just use only the pump to thermal calibrate the machine it doesn’t need to be under load or anything like that it can just free spin outside the machine.
I'm glad of being wrong ahah. I'l put back my 7 blades fan. thx for the test!
 
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