ocaholic Memory Freezer - LN2 pot for RAM
Category : Extreme
Published by Marc Voser on 31.05.10
Due to the fact that ten degrees less on a memory module can make a significant difference in overclocking ocaholic decided to develop its very own liquid nitrogen pot for Corsair Dominator modules. In combination with Corsair GTX2 modules Roger (splmann) Tanner and Marc (Besi) Voser gave their best in overclocking these modules driving them at 1.8 VDIMM and very tight 5-7-7-21 timings. 
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Spezifikationen | Page 7 - Conclusion |
| Page 4 - Test System |
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Preview
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Spezifikationen | Page 7 - Conclusion |
| Page 4 - Test System |
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Specifications Memory Freezer
.| Model | Corsair Memory Freezer |
| Case Type | LN2/Dice |
| Dimensions | 133x56x50 mm(W x H x D) |
| Material | aluminium |
| Color | black |
| Weight | 835g |
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Spezifikationen | Page 7 - Conclusion |
| Page 4 - Left side / right side |
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Test System
Spezifikationen Memory
| Speicher |
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| Bezeichnung |
|
| Typ |
|
| Takt |
|
| Timings |
|
| VDimm |
|
| Versionl |
|
Hardware
| Mainboard |
|
| CPUs |
|
| Grafikkarte |
|
| Festplatte |
|
| Netzteil |
|
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Spezifikationen | Page 7 - Conclusion |
| Page 4 - Test System |
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Isolation and Setup
To isolate the board properly, that no condesation water causes short circuits we had to use armaflex and rubber en masse.1. Install memory
2. Install copper plate on memory
3. Install cooler on memory
4. Isolate cooler
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Spezifikationen | Page 7 - Conclusion |
| Page 4 - Test System |
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HEXUS Pifast CL5
Hexus Pifast computes, based on a multithreaded algorithm 10'000'000 decial places of Pi. Therefore it is possible to provide every core of the CPU with 100 percent load. Like this it is possible to show differences between different architectures. We decided to test the GTX2 Modules using 1.8 VDImm and 5-7-7-21-T1 timings whereby the time it took to compute the decial places is not relevant. What we were looking for has been the point where the memory stopped scaling with lowering the temperature.
| HEXUS Pifast | Percent | |
| 25°C | 1622Mhz | 100.00 % |
| 15°C | 1682Mhz | 103.60 % |
| 5°C | 1750Mhz | 107.00 % |
| -5°C | 1820Mhz | 112.20 % |
| -15°C | 1880Mhz | 115.90 % |
| -25°C | 1916Mhz | 118.10 % |
| -35°C | 1940Mhz | 119.60 % |
| -45°C | 1965Mhz | 120.60 % |
| -55°C | 1964Mhz | 121.10 % |
| -65°C | 1968Mhz | 121.30 % |
| -75°C | 1950Mhz | 120.30 % |
At a temperature of -70°C the graphs culmination point is reached and relative to the best result the results start to scale negatively. In our test the best operating temperature for the Corsair GTX2 modules was -65°C. Therefore we could see a remarkable increase of 21 percent clockwise.
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Specifications | Page 7 - Conclusion |
| Page 4 - Test System |
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Conclusion
With the Memory Freezer it is possible to chill Corsair Dominator memory using liquid nitrogen or dry ice. Only a few degrees less can make a big difference which is exactly why we decided to build the memory freezer. Installing it is easy an it can be used with either Triple-, Dual- or Single Channel memory.Using the memory freezer you shouldn't be mean with isolation because this could end in a small disaster. We configured the memory with 1.8 VDimm and very tight 5-7-7-21-T1 timgins. Therefore we reached a memory clock of 1968 MHz at -65°C. One can clearly see that at -70°C the maximum memory clock starts to decrease and the memory doesn't scale positively anymore. In the end we saw a 21 percent increase clockwise which is an astonishing result.
The Memory-Freezer is available in limited numbers at Marc (Besi) Voser www.ocaholic.ch to a price of CHF 121.- (est EUR 85.-)
| Page 1 - Intorduction | Page 5 - Setup |
| Page 2 - Preview | Page 6 - Test |
| Page 3 - Spezifikationen | Page 7 - Conclusion |
| Page 4 - Left side / right side |
Discuss this article in the forums
Author: m.voser@ocaholic.ch Redacted by: m.buechel@ocaholic.ch