Prime95 larger FFT crush on Transmeta CPU

sam1275tom

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Oct 13, 2014
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Hello.
When I try to run Prime95 on a HP T5710(CPU is Transmeta TM5700@800Mhz), it works fine as long as FFT is not larger than 32k, it will immediately crush if FFT size equal or larger than 48k (only prime95 crush, no BSOD or other bad things). Why?
With max FFT not larger than 32k, I can run at any other settings, as long as I want(tested 2 hours without error). Also the machine passed MEMtest86 perfectly. What does FFT mean?
Prime95 also says L2 cache unknown, but that shouldn't be the cause I think.
The OS is Windows XP SP3 Professional N, Prime95 version is 28.10.
Please don't ask me why I'm stress testing such a niche/ancient machine, I just like to do it, let's make this thread technical-only.
Thanks.
 

sam1275tom

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Oct 13, 2014
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OMG I think we found that wiki page at the same time... I just read that before came here :pt1cable:
BTW I still don't know how FFT size actually affect the test of prime95, I can't find the answer anywhere.
Okay I may try it later, thank you.