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Sslixtis
04-05-2003, 01:16 PM
It appears that the Dell Axim X5s now shipping have the New Intel PXA255 processor in them. When you look at the detailed spec sheet it only lists Intel Xscale 400 Mhz instead of saying which version, however a co-worker just returned his and the replacement he recieved appears to have the new PXA255 in it! 8O

Now I wish the next generation of PPCs would hurry up. I don't like having a slower processor than others! :oops:



:twak: Give me some new PPCs

tito3
04-05-2003, 01:59 PM
What about the newest iPAQ models (39xx series onwards)? Has HP started replacing the old PXA250 microprocessors? Intel has already stop producing them, so I suppose that unless HP has large supplies of the old processor to include in its models, then (hypothetically :? ) any new iPAQ should come with the new chips (The C1 stepping as it has been indicated by other Dell Axim X5 users).
But this yet has to be confirmed. I don’t expect HP to say anything about the new chips in the same way as Dell didn’t. So, anyone that has recently bought an iPAQ, would be kind to confirm whether it comes with the C1 stepping or the B2?

PetiteFlower
04-05-2003, 04:22 PM
The Ipaq forum might be a more useful place to post that question :)

bdegroodt
04-05-2003, 05:27 PM
What about the newest iPAQ models (39xx series onwards)? Has HP started replacing the old PXA250 microprocessors? Intel has already stop producing them, so I suppose that unless HP has large supplies of the old processor to include in its models, then (hypothetically :? ) any new iPAQ should come with the new chips (The C1 stepping as it has been indicated by other Dell Axim X5 users).
But this yet has to be confirmed. I don’t expect HP to say anything about the new chips in the same way as Dell didn’t. So, anyone that has recently bought an iPAQ, would be kind to confirm whether it comes with the C1 stepping or the B2?

Given that Dell is the king of JIT production, I'd say that HP/Compaq would be second in line soon after Dell in using the new processors. Probably a month or so I'd guess.

QYV
04-05-2003, 08:40 PM
It appears that the Dell Axim X5s now shipping have the New Intel PXA255 processor in them. When you look at the detailed spec sheet it only lists Intel Xscale 400 Mhz instead of saying which version, however a co-worker just returned his and the replacement he recieved appears to have the new PXA255 in it!

The question really seems to be: does using a PXA255 in an otherwise unchanged Axim X5 bring any benefit?

As I understand it, there are two problems which hurt the 250's speed: the well-known memory bus issue, and the fact that the "write-back cache" on the 250 corrupts data and thus cannot be used. The 255 fixes the latter problem (so there would seem to be some gain regardless of device architecture) but I'm not sure if the X5 hardware would need some kind of redesign to accomodate the faster bus speed.

I'm waiting with great interest for benchmarks on the new X5s. If there's a big boost in speed, I'm going to be rather annoyed since I ordered my Axim right before Intel announced the 255. I understand obsolesence is a part of any technology, but to have it happen in two months is a little aggravating...

Sslixtis
04-06-2003, 03:45 PM
Here are some Benchmarks between the 400Mhz Axim X5 with the PXA 250 and with PXA 255. I used Pocket PC Benchmark (http://www.ive-software.com/pocket-pc-benchmark.php3).


CPU Benchmark-PXA250 X5
Interger arithmetic-5011
Heap management-8681
Floatingpoint Arithmetic-8403
Graphics Benchmark
GDI graphic routines 1-1641
GDI graphic routines 2-1350
GDI graphic routines 3-1639

CPU Benchmark-PXA255 X5
Interger arithmetic-3642
Heap management-8557
Floatingpoint Arithmetic-6705
Graphics Benchmark
GDI graphic routines 1-1636
GDI graphic routines 2-1221
GDI graphic routines 3-1470

Results are in milliseconds, Less is better! :twak:

spursdude
04-06-2003, 05:20 PM
Here are some Benchmarks between the 400Mhz Axim X5 with the PXA 250 and with PXA 255. I used Pocket PC Benchmark (http://www.ive-software.com/pocket-pc-benchmark.php3).

That's pretty nice... nothing too major though...

maximus
04-07-2003, 02:16 AM
How do you know whether an AXIM is equipped with PXA250 or PXA255 ?

QYV
04-07-2003, 09:02 AM
Here are some Benchmarks between the 400Mhz Axim X5 with the PXA 250 and with PXA 255. I used Pocket PC Benchmark.

Thanks for posting these. It now occurs to me that I'm not informed enough to figure out the real-world difference that those benchmark results represent - one good way to calibrate would be to benchmark a 206 MHz StrongARM device and see if it's comparable or has larger gaps in the numbers. Any chance you've got an iPAQ or other early 2002 PPC you could test?

wesk
04-08-2003, 01:32 AM
How do you know whether an AXIM is equipped with PXA250 or PXA255 ?

Tap Start, Settings, About.
It lists the Processor type. i.e. Intel PXA250

Wes

Sslixtis
04-10-2003, 09:36 PM
Unless you've installed the ROM upgrade from A00 to A02 it will list the PXA255 as PXA250 C1. After you install the ROM upgrade it will state PXA255. :wink:

Computer Ninja
04-14-2003, 11:13 AM
Here are some Benchmarks between the 400Mhz Axim X5 with the PXA 250 and with PXA 255. I used Pocket PC Benchmark (http://www.ive-software.com/pocket-pc-benchmark.php3).


CPU Benchmark-PXA250 X5
Interger arithmetic-5011
Heap management-8681
Floatingpoint Arithmetic-8403
Graphics Benchmark
GDI graphic routines 1-1641
GDI graphic routines 2-1350
GDI graphic routines 3-1639

CPU Benchmark-PXA255 X5
Interger arithmetic-3642
Heap management-8557
Floatingpoint Arithmetic-6705
Graphics Benchmark
GDI graphic routines 1-1636
GDI graphic routines 2-1221
GDI graphic routines 3-1470

Results are in milliseconds, Less is better! :twak:

So it's nothing to be worried about if you have the 250.

ethancaine
04-27-2003, 05:25 AM
I know the benchmarks aren't showing much of a difference between the the PXA250 Axim and the PXA255 Axim, but just to put forth my two cents, I have noticed a huge increase in speed in everything, especially video.

mc_03
04-27-2003, 10:35 PM
Plus the PXA255 has power saving features, increasing your battery life substantially.

Sslixtis
04-28-2003, 01:33 AM
You guys can put the salt away, I'm feeling the urge to buy a new PPC enough already! :lol:

QYV
04-28-2003, 06:35 AM
Plus the PXA255 has power saving features, increasing your battery life substantially.

I've read about this in several places and understand a little about it, but can anyone confirm for certain that the Axim as currently specced can take advantage of this aspect of the 255? I.e. the device doesn't need a redesigned circuit board to support the lower voltage that the chip allows (you can tell how much I know about electrical engineering... :oops: ).

Fishie
04-28-2003, 10:59 AM
Plus the PXA255 has power saving features, increasing your battery life substantially.

I've read about this in several places and understand a little about it, but can anyone confirm for certain that the Axim as currently specced can take advantage of this aspect of the 255? I.e. the device doesn't need a redesigned circuit board to support the lower voltage that the chip allows (you can tell how much I know about electrical engineering... :oops: ).

The new Axim´s already have that licked.

JimA
05-22-2003, 09:24 PM
Just spoke to Dell about what they are shipping. The sales person confirmed with Tech Support that they are currently shipping the PXA250 chip, not the 255.

What gives?

bdegroodt
05-22-2003, 09:28 PM
Just spoke to Dell about what they are shipping. The sales person confirmed with Tech Support that they are currently shipping the PXA250 chip, not the 255.

What gives?

I'd say your salesperson gives. I've seen screen shots showing the 255.

mc_03
05-23-2003, 02:53 AM
Dell tech support doesn't usually know what they're talking about...

Besides, the new ROM update Dell released specifically says that it adds better support for the PXA255.

Sslixtis
05-23-2003, 07:36 PM
Definitely has the PXA255 I have one sitting right beside me now About > Intel PXA255. 8)

neil ivymount
05-29-2003, 06:45 PM
New Axim showed up yesterday. Shipped 5/26. Has PXA255!

kevdawg2003
07-12-2003, 01:04 PM
Here are some Benchmarks between the 400Mhz Axim X5 with the PXA 250 and with PXA 255. I used Pocket PC Benchmark (http://www.ive-software.com/pocket-pc-benchmark.php3).


CPU Benchmark-PXA250 X5
Interger arithmetic-5011
Heap management-8681
Floatingpoint Arithmetic-8403
Graphics Benchmark
GDI graphic routines 1-1641
GDI graphic routines 2-1350
GDI graphic routines 3-1639

CPU Benchmark-PXA255 X5
Interger arithmetic-3642
Heap management-8557
Floatingpoint Arithmetic-6705
Graphics Benchmark
GDI graphic routines 1-1636
GDI graphic routines 2-1221
GDI graphic routines 3-1470

Results are in milliseconds, Less is better! :twak:

are lower numbers better then? i am confused.

also, what is the difference between the 250 and the 255... bus speed?

PetiteFlower
07-12-2003, 05:39 PM
Lower numbers are better because the numbers represent milliseconds.

kevdawg2003
07-13-2003, 05:55 AM
Lower numbers are better because the numbers represent milliseconds.

thank you much

boyo
07-14-2003, 06:14 PM
Dudes & dudettes: You want to have ROM version A03 installed to take full advantage of the performance of the PXA255.

The A02 ROM adds support for the writeback caching (WB) which might give a small performance boost to some memory thrashing apps. The A03 doubles the internal bus speed of the process (not the external bus) which gives the most improvement.

-Boyo