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The $25 Copper Dice Pot

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post #1 of 11 (permalink) Old 02-15-2015, 11:56 AM - Thread Starter
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Hey OCN!

I am at it again! I thought I would share my recent success with this cheap little dice pot I made. It cost me roughly $25! I made one of these a while back but I sold it when I lost interest. I have been looking to get back into cold benching and thought I would start by making another ghetto dice pot. I am pretty excited with the results, but there are some limitations but I will get to that in a minute.

Parts:
I used standard electronics grade RoHS solder and a propane torch to do the copper pipe sweating. However, you could just use epoxy if you don’t want to deal with a torch and copper pipe sweating. To clamp the pot down to the MB, I cut a 2” hole in an old 775 back plate. This is just a temporary mounting solution because the plastic is not strong enough to properly clamp down the pot.

Temps:
I started testing with a nice little QX9750 that I got from a friend who works for Intel. My biggest complaint is that the pot does not handle CPU load very well. I knew this was going to be a problem going in because there is just not enough copper to maintain the temp under heavy load. But for CPUZ runs and even moderate load benching, it works great.

P4 Family Temps:
CPU Pot near bottom: -65c
CPU Idle @ stock voltage: -65c
CPU Idle @ 1.4v: -60c
CPU Idle @ 1.8v: -40c
CPU 100% Load @1.8v: -30c

Quad Temps (QX9750)
CPU Pot near bottom: -65c
CPU Idle @ stock voltage: -30c
CPU Idle @ 1.4v: -20c
CPU Idle @ 1.8v: -10c to 0c
CPU 100% Load @1.8v: +30c


Ideas for the future:
In the last pot of this nature I made, I found that adding copper to the bottom of the pot made a SLIGHT improvement in the load temps. I am not going to mess with that this time because I won’t be doing much load benching. I am mostly looking for clock speeds and maybe a few pi runs. I am going to upgrade the insulation type and make a metal mounting bracket. For not though, I am going to do a lot more dice runs with this pot how it is and see what kind of clocks I can get with all the various CPU’s and Motherboard I have on hand. I have been buying up popular P4’s and all the good motherboard I can get for a good price. Here are a few pictures!!








Made the first run when I was at work...my boss wanted to see this "overclocking thing" in action.




QX9750 Overclock 5.6ghz:





Pent D 925 overclock 6.1ghz:



This is all for now…but stay tuned for future improvements and clocks.

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post #2 of 11 (permalink) Old 02-15-2015, 01:38 PM - Thread Starter
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:DI am getting ready for a dice run today. I am going to be working with a new (to me) Pentium D 925 and a P5Q motherboard. I have 5 of these chips and I am going to work as hard as I can to break 7ghz.


IMG_20150215_124659.jpg~original

24/7 BENCH
(9 items)
CPU
[LGA115x] 8700k, 7700K, 7350k, G3258
CPU
[LGA2066] 7940X, 7740X
Motherboard
[OCF FTW] X299 OCF, Z170M OCF, Z97 OCF
GPU
E-Power, G-Power, H-Power, A-Power
RAM
B-DIE, HYKO, PSC, MFR
Power Supply
Seasonic Prime Platinum 1200W
Cooling
Kingpin Cooling: Venom & T-REX
Cooling
2x360 RAD Custom Loop
Case
Dimastech Easy V3.0
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post #3 of 11 (permalink) Old 02-15-2015, 02:00 PM
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This will be fun, nice job.

just curious , would that base be better lapped,, it looks very porous and uneven in the shots, or it does´nt it matter ?

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post #4 of 11 (permalink) Old 02-15-2015, 02:19 PM - Thread Starter
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Quote:
Originally Posted by mr soft View Post

This will be fun, nice job.

just curious , would that base be better lapped,, it looks very porous and uneven in the shots, or it does´nt it matter ?
Thanks man! The end cap out of the box is really rough and not even close to flat. The biggest thing I was worried about is making sure it was at least flat, which is what I did in picture 2. Its still pretty rough (200 grit), but it does make really even contact with the CPU. You are right tho...the results would better if I were to get that base up to like 1000 grit or something. That will go on my TO-DO list along with a better mounting system.

24/7 BENCH
(9 items)
CPU
[LGA115x] 8700k, 7700K, 7350k, G3258
CPU
[LGA2066] 7940X, 7740X
Motherboard
[OCF FTW] X299 OCF, Z170M OCF, Z97 OCF
GPU
E-Power, G-Power, H-Power, A-Power
RAM
B-DIE, HYKO, PSC, MFR
Power Supply
Seasonic Prime Platinum 1200W
Cooling
Kingpin Cooling: Venom & T-REX
Cooling
2x360 RAD Custom Loop
Case
Dimastech Easy V3.0
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post #5 of 11 (permalink) Old 03-07-2015, 03:37 PM - Thread Starter
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Some more pictures from a recent DICE day. As mentioned above, the temps for the quad were not very good under load, but they proved to be much better for P4's. I played around with about 10 new processors, but still have not topped my record of 6.1GHz. I am looking into getting some cherry picked CPU's so I can get some nice clocks. I still have the same goal...7GHz club.

P4 Temps:
CPU Pot near bottom: -65c
CPU Idle @ stock voltage: -65c
CPU Idle @ 1.4v: -60c
CPU Idle @ 1.8v: -40c
CPU 100% Load @1.8v: -30c








I have some ideas in the works for a RAM dice pot...stay tuned for that madness. biggrin.gif

24/7 BENCH
(9 items)
CPU
[LGA115x] 8700k, 7700K, 7350k, G3258
CPU
[LGA2066] 7940X, 7740X
Motherboard
[OCF FTW] X299 OCF, Z170M OCF, Z97 OCF
GPU
E-Power, G-Power, H-Power, A-Power
RAM
B-DIE, HYKO, PSC, MFR
Power Supply
Seasonic Prime Platinum 1200W
Cooling
Kingpin Cooling: Venom & T-REX
Cooling
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post #6 of 11 (permalink) Old 03-07-2015, 03:46 PM
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nice work biggrin.gif
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post #7 of 11 (permalink) Old 04-04-2015, 07:27 PM - Thread Starter
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I got a Commando to play with and I built a new ghetto tech station for benching (turned an HTPC case inside out). This board boots to windows at nearly 6ghz under dice.biggrin.gif I hope you enjoy my work:













My best results for today:
Cele 347 @ 6ghz http://valid.canardpc.com/9b66h1


Cele 352 @ 6.2ghz http://valid.canardpc.com/hpckiy

24/7 BENCH
(9 items)
CPU
[LGA115x] 8700k, 7700K, 7350k, G3258
CPU
[LGA2066] 7940X, 7740X
Motherboard
[OCF FTW] X299 OCF, Z170M OCF, Z97 OCF
GPU
E-Power, G-Power, H-Power, A-Power
RAM
B-DIE, HYKO, PSC, MFR
Power Supply
Seasonic Prime Platinum 1200W
Cooling
Kingpin Cooling: Venom & T-REX
Cooling
2x360 RAD Custom Loop
Case
Dimastech Easy V3.0
▲ hide details ▲


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post #8 of 11 (permalink) Old 04-11-2015, 11:14 AM - Thread Starter
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I have been working on my Commando to prepare it for another dice run with the ghetto pot rolleyes.gif I also got my hands on some P4 915, 945, and cele 360's that I will be torturing. Here are some pictures for now but stay tuned for more dice runs.






24/7 BENCH
(9 items)
CPU
[LGA115x] 8700k, 7700K, 7350k, G3258
CPU
[LGA2066] 7940X, 7740X
Motherboard
[OCF FTW] X299 OCF, Z170M OCF, Z97 OCF
GPU
E-Power, G-Power, H-Power, A-Power
RAM
B-DIE, HYKO, PSC, MFR
Power Supply
Seasonic Prime Platinum 1200W
Cooling
Kingpin Cooling: Venom & T-REX
Cooling
2x360 RAD Custom Loop
Case
Dimastech Easy V3.0
▲ hide details ▲


mllrkllr88 is offline  
post #9 of 11 (permalink) Old 04-21-2015, 09:01 PM
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post #10 of 11 (permalink) Old 05-17-2015, 09:43 AM
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Nice idea, but base of your pot is far to thin for such hot CPU like P4 family. That's why you're experiencing such poor temperatures. Piece of rod (~20mm thick) with couple of holes should perform much better smile.gif

ITX POWER i5 3470 @ 4.0GHz | Asrock Z68M-ITX | 8GB Corsair | Club3D HD7770 | Cubitek Mini Cube
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