K7S5A AMD Athlon now says AMD Duron

Asus / Crosshair iii formula
March 16, 2010 at 20:37:16
Specs: Windows XP Pro SP3,
On a ecs k7s5a mb amd athlon 1800+ CPU after a running at the command prompt what I believe was
chkdsk c: /f /r which seemed to go well, I realized that on the initial bootup screen after completion that it now displays amd duron 1400mhz at 133/133 and when stepped down to 100/100 it displays 1050mhz as opposed to the normal amd athlon 2600 at 133/133???...
I have checked the bios settings which appear to be normal and have stepped down restarted and then stepped up and restarted to no avail, could the bios have been corrupted perhaps as the cpu never overheated nor have there been any recent downloads etc?
Checked cpuz which says its an amd duron as well which is completely off as it is definitely not...
How can I reset the bios back to amd athlon?

See More: K7S5A AMD Athlon now says AMD Duron

March 16, 2010 at 21:45:43
Do you have an 1800+ or a 2600+? Your board is telling you you have a 1600+...only thing that board will support with a 10.5 multiplier.

Tbred 1800+ runs at 133 x 11.5
Tbred 2600+ runs at 133 x 16
Tbred 2600+ Mobile also runs at 133 x 16

Nothing adds up here; maybe I should says multiplies up here.


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March 16, 2010 at 21:50:13
The only way the CPU name could change would be because of a swapped CPU or because of a BIOS flash.

Which CPU do you actually have? The default speed of an Athlon XP 1800+ is 1.53GHz (11.5 x 133MHz). If the CPU frequency is lowered to 100MHz, the CPU *should* run at 1150MHz. But since you mentioned 1400MHz at 133MHz freq & 1050MHz at 100MHz freq, the multiplier is 10.5x. That would mean you either have a AXP 1600+ or AXP 3000+ as those are the only Athlon XP CPUs with a 10.5x multipler.

Are you 100% sure you have an ESC K7S5A & not one those crappy L7VMM3 setups with the integrated CPU?

"From the AnandTech motherboard forum:

Duron 1400/133 = Pro 2300+
Duron 1600/133 = Pro 2500+
Duron 1800/133 = Pro 2800+ "

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March 16, 2010 at 22:05:37
Its definitely a ECS K7S5A with a AMD Athlon 1800+, I didnt flash the bios thats why I am wondering if something got corrupted here as its been a ECS K7S5A with a AMD Athlon 1800+(actually set at 133/133 it shows it as 2600+) for years with no problems...
Should I flash the bios or would a format reinstall fix this?

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Related Solutions

March 16, 2010 at 22:17:03
Whatever you do in the operating system has no effect on the mboard's bios, unless you flashed the bios in the operating system.
If you DID flash the bios to a different version, go into the bios and load Bios Defaults, otherwise the Cmos part of the bios may not match the bios version, and if so, the bios may not work correctly.
The bios DOES NOT spontaneously get corrupted.
If you think you may have set bios settings wrong, load Bios defaults and then check the bios settings.

The bios displays the labelling for the AMD cpus according to the multiplier being used and the frequency at which it is running, if the bios version has the capability of labelling the cpu properly .

The multiplier is locked on most AMD cpus, and that's the multiplier the bios uses by default, but some bioses can be custom set to bypass that and use a different multiplier, or certain metallic traces on the bottom side of the cpu can be severed to unlock the multiplier. If the multiplier and the fsb / ram speed are correct for the Athlon XP 2600+, if the bios version has the capability to label the cpu correctly, the label will be correct; if the bios version DOES NOT have the capability to label the cpu correctly, the label will be incorrect, but the cpu can run at it's designed speed.
There are two versions of the XP 2600+ - the earlier version can run at max 266mhz internally, it's actual overall mhz it runs at is a bit higher - the later version can run at max 333 mhz internally, it's actual overall mhz it runs at is a bit lower. Earlier Socket A mboards cannot run at a 166mhz fsb speed, because they can use only up to 133mhz SDram, and the later model XP 2600+ , with it's lower multiplier, if the default multiplier is used, cannot run at it's full speed on a mboard that can't use 166mhz DDR ram.

Athlon 2600+ Rated 2600mhz
- 2133mhz (real)
Bus speed (MHz) 266
Clock multiplier 16

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March 16, 2010 at 22:23:03
If you did not flash the bios, then I can only guess you have a 1800+ with and unlocked multi and that it is currently set at 10.5 instead of 11.5. Check that setting in BIOS so we at least know the current setting.


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March 16, 2010 at 23:18:52
The only real changeable setting in the bios for the K7S5A is to change the cpu speed under cpu pnp from 100/100 to 133/133 which it is set to but still shows it as being an AMD Duron at 1400mhz and the multiplier shows 10.5???
So do I have to reflash the bios then to restore it back to where it was and should be?
If that is the answer can someone walk me through the flash bios step by step please, as I haven't had to do that for about 100 years?

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March 17, 2010 at 00:17:35
You're right...no fsb or multiplier settings or readouts in that silly PnP cpu. Here's the download page for bios and flash utility.

http://www.ecs.com.tw/ECSWebSite/Do... &MenuID=0&LanID=0

Instructions; follow them to the letter and make sure your boot floppy works perfectly.


This is all for the 1.1 and 3.1 motherboard revisions.


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March 17, 2010 at 05:35:52
If the multiplier is defaulting to 10.5x, you do not have an AXP 1800+. And I don't know where you're getting the 2600+ from because an 1800+ obviously is not a 2600+.

Post the info you're getting from CPUZ. Make sure you're using the latest version (1.53) & let us know what is listed for the following:

Code Name:
Core Speed:
Bus Speed:
Rated FSB:

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March 17, 2010 at 05:56:45
Okay, you are probably not going to believe this as I am having a difficult time with it as well, but after I shut everything down last night and then restarted it this morning... everything is as it was before all of this happened... now how is that possible and yes it was a bonified AMD Athlon 1800+ that I set to 133/133, the more amazing thing is that it somehow the mb thought it was an AMD Duron 1400+ after the chkdsk c: /f /r makes no sense... has anyone ever heard of this?
I should have recorded the cpuz earlier since now I dont have anything to compare it too, but I remembered that it said AMD Duron 1400+ Applebred x10.0 and now it says AMD Athlon 2600+ Thoroughbred x16.0 and even the AMD green symbol in the upper right corner is changed...very strange indeed.

Name: AMD Athlon XP
Code Name: Thoroughbred
Technology: 0.13 um
Specification: AMD Athlon(tm) XP 2600+
Model: 8
Core Speed: 2124.5 MHz
Multiplier: x16.0
Bus Speed: 132.8 MHz
Rated FSB: 265.5 MHz

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March 17, 2010 at 09:53:30
"I remembered that it said AMD Duron 1400+ Applebred x10.0"

None of this makes any sense. Is part of the problem that you're confusing the model number & the actual clock speed? Early Atlons were refered to strictly by their clock speed. When the Athlon XP came along, they were assigned model numbers that had nothing to do with the actual clock speed. For instance, an Athlon XP 1800+ does not run at 1800MHz, it runs at 1533MHz. All Durons are refrered to by their clock speed only...there is no such thing as a Duron 1400+, it would be called a Duron 1400MHz or if you prefer, 1400MHz Duron. Anyhow, all this stuff about your CPU being recognized as a Duron or speed being reported as either 1050MHz or 1400MHz makes absolutely no sense. All I can think of is you have a glitch in the BIOS.

Cheepoman & HoneyX developed an overclocking BIOS for the ECS K7S5A many years ago & they went thru several revisions. They're still available if you want to give them a try:


I suggest trying the lastest from HoneyX - OC030327.zip. And I recommend that you perform the flash using the two-floppy method. Floppy 1 = WinME boot floppy, floppy 2 = BIOS ROM (HX0327b.rom or HX0327bf.rom) & AMI flash utility (aminf342.exe). Here's how it's done:

1. boot off floppy 1, select option 4, "minimal boot", then wait for the A:\> prompt to come up
2. remove floppy 1 & insert floppy 2. At the A:> prompt, type aminf342 & press ENTER
3. follow the on-screen instructions

Looking at the CPUZ results, you do NOT have a "bonified AMD Athlon 1800+". You have a AXP 2600+. More than likely, the reason it was being identified as an AXP 1800+ is because you were running the CPU freq at 100MHz rather than 133MHz.

Try the BIOS flash.

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March 17, 2010 at 10:11:42
No it doesn't make any sense, but anyway the info is as I wrote it as that is what was displayed. Like I said earlier it was running at 133/133 and cpuz displayed AMD Duron 1400+ Applebred x10.0, however why it did that I have no idea except that the chkdsk c: /f /r must have triggered it somehow. I would agree that there must have been some sort of bios glitch which was probably caused by the chkdsk c: /f /r somehow and now it has reset itself, an unsolved mystery I suppose...

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March 17, 2010 at 14:40:19
"Like I said earlier it was running at 133/133 and cpuz displayed AMD Duron 1400+ Applebred x10.0"

And like I said, there is no such CPU, at least not with the "+". Besides, you apparently have an AXP 2600+, I don't know what made you think you had an 1800+?

"probably caused by the chkdsk c: /f /r"

Chkdsk is used for checking the HDD & has absolutely nothing to do with the BIOS. The BIOS is contained on a small chip on the board...when the system is started, the BIOS 'reads' the hardware then displays it's findings on the screen. Your BIOS is not reading the CPU data correctly & the only way to correct that would be to update it.

Flash the BIOS!

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March 17, 2010 at 15:37:26
Probably the label and paperwork that listed it as an AMD Athlon 1800+, and like I said I am just relaying the info that I got, as I didn't build the thing. chkdsk c: /f /r was the only recent activity that occurred so if it wasnt that then I really have no idea why that would occur nor does anyone else apparently.

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March 17, 2010 at 15:54:46
"Probably the label and paperwork that listed it as an AMD Athlon 1800+"

It's an Athlon XP, not an Athlon. The Athlon XP is a much better CPU.

"chkdsk c: /f /r was the only recent activity that occurred so...."

Like I said, chkdsk has to do with the hard drive, it has nothing to do with the BIOS. Try disconnecting the hard drive (both the power & data cables), then bootup & see what's displayed on the POST screen. I still say you should flash the BIOS. You have one of the hottest boards available from back in it's time (2001)...it's a shame to waste it on the stock ECS BIOS.

Why did you run chkdsk in the 1st place?

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March 18, 2010 at 12:42:55
I'd go with the HoneyX BIOS too. At least, you'd have some control over the board.

I'd also like to know the number on that processor to settle exactly what it is.


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