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TT 720 and SD cards
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Andy_P
Pocket GPS Moderator
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Joined: Jun 04, 2005
Posts: 19991
Location: West and Southwest London

PostPosted: Tue Sep 11, 2007 5:27 pm    Post subject: Reply with quote

Quote:
My sandisk 512mb card damaged my 720's memory permanently

The SD card slot and the Flash memory would both be controlled by the CPU. I don't see how the SD card could do such a thing itself.
More likely to have just failed of its own accord I'd have thought
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Wazza_G
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Joined: Jan 10, 2006
Posts: 585
Location: Guildford (Regrettibly)

PostPosted: Sun Sep 16, 2007 12:05 pm    Post subject: Reply with quote

Memory can be easily damaged if you don't turn the power off first, it creates power spikes and they can do the damage.

I mean how would you like a high voltage shoved somewhere painful?

Now to you or I the small voltages involved inside a TT are nothing, but to microelectronics, it's life or death, even 0.1v over the top could kill! Shocked
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Wazza_G
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Joined: Jan 10, 2006
Posts: 585
Location: Guildford (Regrettibly)

PostPosted: Sun Sep 16, 2007 6:26 pm    Post subject: Reply with quote

Btw Mymemory are offering a 2Gb (x133 rated) SD card for a £10'er + P&P at the moment and Play.com are offering a similar card for £10, VAT & P&P inc. Very Happy
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Robin2
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Joined: Nov 24, 2003
Posts: 1441
Location: Swansea

PostPosted: Sun Sep 16, 2007 6:43 pm    Post subject: Reply with quote

Wazza_G said

Btw Mymemory are offering a 2Gb (x133 rated) SD card for a £10'er + P&P at the moment and Play.com are offering a similar card for £10, VAT & P&P inc.




I bought one of those My Memory 2GB cards and it appeared to work very well, but occasionally TomTom would freeze and the only cure was to format the card and reload my backup. It would then work fine for two or three weeks before crashing once again.
I exchanged it for a SanDisk Ultra III and have never had the problem since (about 7 months).
I subsequently used the My Memory card in my digital camera, and have lost a few frames, also one or two others have had a blue strip across the bottom covering about 10% of the frame.
I'm sticking to SanDisk Ultra III from now on - they are not much more expensive
Robin
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TomTom One v3 Europe, Navcore 7.903, Western Europe 835.2420
TomTom Go 720 Europe, Navcore 8.351, Western Europe 855.2884
Satmap Active 10
Plus a lot of other PDA GPS kit, seldom used
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