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NukeThemAll Regular Visitor
Joined: Mar 31, 2006 Posts: 129 Location: Hampshire, UK
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Posted: Fri Apr 14, 2006 12:16 pm Post subject: Tom Tom One SD card |
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No doubt that this has been discussed before but....
I e-mailed TT tech support last night, had a reply within an hour (!) which I'll attempt to summarise:
SD card read speed should be at least 10Mb/second. For example, a 60x read-speed card reads at 150 Kb/s x 60 = 9 Mb/s. Card write speed is of course irrelevant during normal use
The TT1 (and GO) supports cards up to 4 Gb
Cheap no-name cards can cause problems such as poor read speeds and even data corruption; they may also have a 'weak' memory controller on the card which inhibits data flow |
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prisci14 Occasional Visitor
Joined: Mar 01, 2006 Posts: 8
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Posted: Sun Apr 16, 2006 1:18 pm Post subject: |
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For a start would sandisk be ok?and if so there are so many variations of the same size card ,what should i pick?Any help always appreciated |
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Tumbleweed Frequent Visitor
Joined: Aug 30, 2004 Posts: 315
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Posted: Sun Apr 16, 2006 4:38 pm Post subject: Re: Tom Tom One SD card |
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NukeThemAll wrote: | No doubt that this has been discussed before but....
I e-mailed TT tech support last night, had a reply within an hour (!) which I'll attempt to summarise:
SD card read speed should be at least 10Mb/second. For example, a 60x read-speed card reads at 150 Kb/s x 60 = 9 Mb/s. Card write speed is of course irrelevant during normal use
The TT1 (and GO) supports cards up to 4 Gb
Cheap no-name cards can cause problems such as poor read speeds and even data corruption; they may also have a 'weak' memory controller on the card which inhibits data flow |
I was looking at a friends 700 last week and was surprised how slow it was compared to my 300 when looking at maps and dragging them around, which I put down to the speed of the HD (as its got a faster processor than the 300 so it wouldnt be that). I wouldnt mind betting the disk in the 700 is slower than most memory cards.
The £6 (was a tenner when I bought it) 256Mb Kingston SD in my 300 is according to Amazon rated as 'fast memory transfer speed, at least 2MB/sec' !!
Tw |
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NukeThemAll Regular Visitor
Joined: Mar 31, 2006 Posts: 129 Location: Hampshire, UK
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Posted: Sun Apr 16, 2006 5:03 pm Post subject: |
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The implication is that 'respected' makes - such as Sandisk (?) are deemed to be more reliable than no-name offerings. Having just ordered a 1 Gb SD card, a Kingston 133x at about £26 from PicStop, I can report back in a week or so on my experiences.
BTW, I have noticed (no big surprise) a large difference in prices of 1 Gb SD cards, even amongst the internet retailers. I'd have needed a second mortgage for some of the high-street prices.....
Main reason for purchase is that I've just acquired a TT1, a decision helped enormously by this web site - a huge, huge thanks to all the contributors and moderators for their insightful and often witty comments!
I intend to load the speed camera POI data and have room for any maps of Europe, and keep the original card as the ultimate backup. With current prices, a 1 Gb card seems to be the best purchase - I won't be needing all of the European maps loaded for any single holiday. |
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prisci14 Occasional Visitor
Joined: Mar 01, 2006 Posts: 8
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Posted: Mon Apr 17, 2006 1:16 pm Post subject: |
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thanx for the speedy comeback guys!just what i needed :D |
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MR_TiGGer Regular Visitor
Joined: Apr 20, 2006 Posts: 94 Location: God knows!! Ask Jane
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Posted: Fri Apr 21, 2006 12:41 am Post subject: |
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www.scan.co.uk Is a Fine Place to get stuff like that, of at least give you a "Realistic" price unlike PCWorld and such |
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mfs227 Occasional Visitor
Joined: Mar 08, 2006 Posts: 5
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Posted: Fri Apr 21, 2006 12:36 pm Post subject: Re: Tom Tom One SD card |
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Tumbleweed wrote: | NukeThemAll wrote: | No doubt that this has been discussed before but....
I e-mailed TT tech support last night, had a reply within an hour (!) which I'll attempt to summarise:
SD card read speed should be at least 10Mb/second. For example, a 60x read-speed card reads at 150 Kb/s x 60 = 9 Mb/s. Card write speed is of course irrelevant during normal use
The TT1 (and GO) supports cards up to 4 Gb
Cheap no-name cards can cause problems such as poor read speeds and even data corruption; they may also have a 'weak' memory controller on the card which inhibits data flow |
I was looking at a friends 700 last week and was surprised how slow it was compared to my 300 when looking at maps and dragging them around, which I put down to the speed of the HD (as its got a faster processor than the 300 so it wouldnt be that). I wouldnt mind betting the disk in the 700 is slower than most memory cards.
The £6 (was a tenner when I bought it) 256Mb Kingston SD in my 300 is according to Amazon rated as 'fast memory transfer speed, at least 2MB/sec' !!
Tw |
The cheap card I used was manufactured by Hamma and just isn't up to snuff.
mfs227 |
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NukeThemAll Regular Visitor
Joined: Mar 31, 2006 Posts: 129 Location: Hampshire, UK
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Posted: Fri Apr 21, 2006 6:56 pm Post subject: |
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I've now installed my Kingston 1 Gb 133x card, purchased for ~£26 from PicStop, and all seems to be fine - although I've only used it as a 'working card' with just the UK mapping, leaving the original card as the ultimate backup (and yes, I have also backed up to a PC).
Early days with my TT1 but so far, very impressed. As expected, noted a few map mistakes on my local roads, but no consistency - some mistakes are on quite old changes eg new roundabouts, but more recent changes, like 3-4 years ago, seem to be there. |
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