| ID | | Article Title | Post Date |
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69 | 
| What are the known incompatibilities with the Crescendo/7200 v1.1? | May-12-09 |
| As far as memory DIMMs, some 128MB DIMMs that employ an 8K refresh are known to pose potential problems. 128MB DIMMs are typically composed of 16 chips, each a 16Mx4 part. There are two types that are used, the "4K Refresh" and the "8K Refresh". The Crescendo/7200 is not compatible with some DIMMs made with "8K Refresh" parts because the timing margins are so thin that the electrical "noise" generated by the card causes errors. The "8K" versus "4K" parts can be identified by the part numbers of the chips on the DIMM, or by checking with the manufacturer of the chips.
At this time, the only PCI expansion card known to be incompatible is the VillageTronic MPDD+ video adapter.
Due to the nature of the issues listed above, Sonnet does not expect them to be resolved. Users are advised to utilize alternative solutions. |
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71 | 
| What type of RAM can I add to my Crescendo/7200 card? | May-12-09 |
|
85 |
| System will not boot, or consistently crashes early in start-up. | Jan-28-10 |
| Issue 1: There are specific memory requirements for proper operation of this innovative upgrade. While these are documented in the Crescendo/7200 quick start guide, they may have been overlooked, so please review the solution below carefully.
Issue 2: Sonnet has determined that certain memory DIMMs are less stable than others when used with early production units of the Crescendo/7200 solution. Sonnet has since released both hardware and software updates to provide compatibility with a greater variety of memory. If implementing the solutions recommended for Issue 1 is not effective, you may be encountering a memory compatibility issue.
Solution for Issue 1 (all three must be followed):
1. DIMMS used for RAM expansion should be: 5 volt, 64-bit-wide, 168 pin, fast-page mode, and 70 ns or faster (smaller numbers are faster).
2. Total RAM installed on the Crescendo/7200 card must be equal to or greater than the RAM installed on the Power Macintosh motherboard.
3. In order to run System 7.5.3 through Mac OS 8.6, there must be a minimum of 16 MB RAM on the motherboard, with equal or greater memory on the Crescendo card. In order to run Mac OS 9.0 through 9.1, a minimum of 32 MB is required on the motherboard, with an equal or greater amount on the Crescendo. The Crescendo/7200 does not support Mac OS X.
If you have satisfied all of the above conditions and are still experiencing problems, please proceed to the following solution.
Solution for Issue 2: Make sure you are using the latest Crescendo/7200 software. You can download the new software from the Sonnet web site at:
http://www.sonnettech.com/support/kb/kb?cat=320&expand=_a3&action=b151#b151.
Locate the serial number label on the back edge of the card on the side opposite the DIMM slots. If your Crescendo/7200 has a serial number that begins with an A (e.g. Axxxx), you are eligible for a free upgrade of your hardware that will provide compatibility with a wider array of memory DIMMs; contact Sonnet Customer Service at 1-949-472-2772 for instructions on returning it for this revision. If your card has a serial number that begins with a B, this revision is unnecessary; your card was manufactured with the latest updates.
If your card falls outside the identified ranges, and you continue to experience problems, call Customer Service at 1-949-472-2772 for further assistance.
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171 |
| The speed indicated on the G3 or G4 chip on my Sonnet processor upgrade doesn't seem to match the speed of the upgrade I purchased. What's the story? | May-07-09 |
|
177 |
| System will not boot, or consistently crashes early in start-up with a Crescendo/7200 upgrade card installed in computer. | May-07-09 |
|
218 |
| The computer's standard startup process takes noticeably longer after upgrading to any Mac OS 9.x system from Mac OS 8.6 or earlier. | May-12-09 |
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221 |
| After installing the Sonnet Crescendo/7200 into a machine with two other PCI cards, or adding an additional PCI card to a machine already running the 7200 upgrade, the computer does not boot past the "Happy Mac" icon. If I remove either one of the PCI cards or the upgrade, the computer will boot without a problem. The same is true if I boot up holding down the SHIFT key to boot with extensions off. | May-07-09 |
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222 |
| After installing the Sonnet Crescendo/7200 into my machine, making sure I followed the instructions on RAM distribution, the computer does not boot past the "Happy Mac" icon. If I remove the 7200 upgrade, the computer will boot without a problem. The same is true if I boot up holding down the SHIFT key to boot with extensions off. | Aug-06-09 |
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223 |
| After installing the Sonnet Crescendo/7200 into a machine with 128MB RAM DIMMs, or adding 128MB RAM DIMMs to the machine that already was running the 7200 upgrade, the computer does not boot past the "Happy Mac" icon. The DIMMs work when installed alone on the logic board without the 7200 upgrade installed. If I remove either the 128MB RAM DIMMs or the processor upgrade, the computer will boot without a problem. The same is true if I boot up holding down the SHIFT key to boot with extensions off. | May-07-09 |
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