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post #1 of 18 (permalink) Old 07-11-2006, 11:28 PM Thread Starter
 
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WTB, Pentuin 4 CPU, Inel part # SL7EY

This is a socket 478 P4, 2.8 gz, 400 Mz fsb, 512 Kb cache. Kind of rare and definitley out of production.

I need one (or 2 or 3) for a project at work. Some industrial control code that we inherited from another company seems to run 'best' on this combination of CPU and a custom controller board.

These things can be found in some obsolete Dell and IBM desktop systems of about 2003 vintage. The procurement people at the office are combing our usual suppliers but I though I'd try here to see if anyone has an old system unit or just the CPU that they want to get rid of.

thanks
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post #2 of 18 (permalink) Old 07-12-2006, 12:07 AM
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i know not cheap, but they have them
http://www.itparts.us/sl7ey.html?synertech
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post #3 of 18 (permalink) Old 07-12-2006, 12:08 AM
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(and they are new)
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post #4 of 18 (permalink) Old 07-12-2006, 01:48 AM
 
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I did a little searching and came up with this....

http://www.starmicro.net/detail.aspx?ID=542

To find the lowest prices I usually take the model number or something along those lines and type em into a Froogle search, or got to pricewatch.com and resellerratings.com. But in cases like this I understand it can very hard to even find the item. I hope this helps some.
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post #5 of 18 (permalink) Old 07-12-2006, 08:09 AM
 
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Are you sure it needs that specific clock speed, FSB, and L2 cache? Sounds to me like any Northwood would work for you.

Then again, "industrial control code" and "custom controller board" seem like something on which you wouldn't wanna mess around with something similar but not the same.

I can reasonably see someone designing something around a particular architecture.. or a particular core (Northwood, for example).. but not a specific Intel part number. That's just dumb.

Last edited by 00ChryslerIntrepid; 07-12-2006 at 08:13 AM.
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post #6 of 18 (permalink) Old 07-12-2006, 11:06 AM
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I've purchased processors from Starmicro before and have been very happy with the parts and shipping. I wouldn't hesitate to order from them again. Just my 2 cents.
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post #7 of 18 (permalink) Old 07-12-2006, 03:56 PM
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Quote:
Originally Posted by 00ChryslerIntrepid
Are you sure it needs that specific clock speed, FSB, and L2 cache? Sounds to me like any Northwood would work for you.

Then again, "industrial control code" and "custom controller board" seem like something on which you wouldn't wanna mess around with something similar but not the same.

I can reasonably see someone designing something around a particular architecture.. or a particular core (Northwood, for example).. but not a specific Intel part number. That's just dumb.
happens all the time, becuase they want to know exactly when somethng is going to happen, most of those devices use a JIT compiler/IO system
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post #8 of 18 (permalink) Old 07-12-2006, 03:58 PM
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it could really suck (as an example) in a CNC machine, for the processor to be ahead/or behind the cutting tool, cuase you would end up with a lot of useless parts!
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post #9 of 18 (permalink) Old 07-12-2006, 04:16 PM
 
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I suppose... but I still think it's pretty dumb. There's got to be ways to make most of that transparent.
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post #10 of 18 (permalink) Old 07-12-2006, 04:29 PM Thread Starter
 
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In the industrial controls world, it's very common to tightly bind computer code to the controller hardware. In this instance, the specific combination of SSE2/3 and 512 Kb on-chip cache is what we need. There are some nasty timing loops that depend on the chip throughput as well, this is what eliminates a slower (but loads more available) Northwood core.

Intel typically sells its cpu variants into the industrial markets for a minimum of 10 years. 'fer instance they only just now dropped the 80286/87 chips and matching memory management chips from their industrial catalog.

The premature death of the SL7EY CPU caught a lot of the industry by surprise. My firm has a side contract to rework the code base and move it to a PPC7xx base, but we need to recreate a development and simulated production environment on both platforms for QA.

Last edited by '98-ESer; 07-12-2006 at 04:34 PM.
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post #11 of 18 (permalink) Old 07-12-2006, 04:38 PM
 
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I'll have to see exactly what I have when I get home, but I have a 2003 Dell with a 2.8 P4. It might be what you need. If its what you need maybe it will give me an excuse to upgrade.
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post #12 of 18 (permalink) Old 07-13-2006, 04:48 AM
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Quote:
Originally Posted by '98-ESer
In the industrial controls world, it's very common to tightly bind computer code to the controller hardware. In this instance, the specific combination of SSE2/3 and 512 Kb on-chip cache is what we need. There are some nasty timing loops that depend on the chip throughput as well, this is what eliminates a slower (but loads more available) Northwood core.

Intel typically sells its cpu variants into the industrial markets for a minimum of 10 years. 'fer instance they only just now dropped the 80286/87 chips and matching memory management chips from their industrial catalog.

The premature death of the SL7EY CPU caught a lot of the industry by surprise. My firm has a side contract to rework the code base and move it to a PPC7xx base, but we need to recreate a development and simulated production environment on both platforms for QA.

Are you certain the chipset will not supoort a 533 or 800MHz FSB CPU?

What chipset is it? My best guess would be an i845, many of these support 533 FSB. Of all the industrial boards I have seen, the i845 is almost always the chipset used.

Barring that, there's always EBAY!

Unfortunately, I have nothing to offer, all I have in stock for S478 is a lousy Celeron 2.7, yuck!

let me do some checking...... I'll try to dig one up, I have to buy used parts all the time for little old ladies that are just so emotionally attached to their old PCs that they won't upgrade. That might explain the stack of Slot 1 boards in the corner!

EDIT: The damn timing loops will also prevent you from using the faster 533 bus chips, regardless of mainboard support. Curses!

Last edited by hardwareguy; 07-13-2006 at 05:20 AM. Reason: Damn Timing loops!
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post #13 of 18 (permalink) Old 07-13-2006, 05:08 AM
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More data and a source!

Oh boy! According to Intel's website, this CPU doesn't exist, but we know better. I remember seeing one in the flesh.

This CPU is quite rare, so rare it even isn't listed in the Intel spec pages. From the info I'm gatering, they are coveted by overclockers due to the low bus freq. You can crank up the bus to 533 and get a nice OC.

These were offered in store bought crappy PCs for the SOLE purpose of pumping up the clock speed and selling a cheap 400MHz FSB mainboard to an unwitting customer. Most 2.8 GHz Northwood chips ran at 533 or 800 MHz bus speeds.

There are a few on eBay. Some are new with an Intel heatsink/fan.

They ain't cheap! All will sell for over $100 it seems.

These remind me of the 100MHz bus PIII chips a while back, rare and pricey but the only thing that worked with a 440BX.
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post #14 of 18 (permalink) Old 07-13-2006, 05:26 AM
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Quote:
Originally Posted by wb6vpm
it could really suck (as an example) in a CNC machine, for the processor to be ahead/or behind the cutting tool, cuase you would end up with a lot of useless parts!
No kidding, and they would have a BITCH of a time finding out why until the programmer came to do diags.

Kudos for this very good example on how substitute chips cause problems.

Any one try to play an old game on a new PC and find that the character cannot be controlled because it's too fast? The same thing applies to the timing loops in the industrial controller.
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post #15 of 18 (permalink) Old 01-03-2007, 07:42 PM
 
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Sl7ey

There is an ebay shop based in China which has offten adertised SL7EY it can be quite expensive though, 120-160 $.
http://cgi.ebay.co.uk/New-P4-2-8-2-8...em180069645021
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