AMD Clawhammer ES in Socket 754 motherboard

[Katmai500]

I recently got an ASUS K8V-X Socket 754 motherboard. I wanted to use it to test a Socket 754 Clawhammer Engineering Sample that I acquired a few years ago. However, after a bit of research I found on xsecret's website that many of the early Clawhammer samples needed a special motherboard to work. My sample was made around the same time as xsecret's 1.2 GHz sample (link), but has some different markings. So I'm not sure if it will work in a regular Socket 754 motherboard. I figured I'd check the collective wisdom of the forum before potentially damaging the board or CPU.

The number on the bottom (27373) is the same.

[debs3759]

I can't help with your question, but 27373 is package number, which would often have been used for various models.

[debs3759]

I will be interested to know what motherboard is needed

[Katmai500]

xsecret has a picture of his board here.

[debs3759]

Yes, I saw that, but I can't see the model name on that photo.

[Katmai500]

Indeed. I'm also curious to learn more about that motherboard!

[Thandor]

Interesting CPU! I have one too including AMD's Solo 5 motherboard. You can read about it here AMD Athlon HX 1400.

I haven't been able to boot my S754 ClawHammer in other motherboards as well.

The motherboard used by xsecret is probably the ASUS K8M with AMD 8111 + 8151 chipset. I guess you will have more success running the CPU in motherboards based on the AMD chipset. ASUS is not hte only one with AMD chipsets. The Soyo SY-K8USA also used the AMD-8000 series chipset . If you do find a motherboard also keep in mind that the memory controller of these early ClawHammer's isn't as advanced as the later production models. Try using older 256MB double-sided DDR memory modules if you don't have luck with 512MB single-sided modules. In theory you can use 200MHz (DDR-400) modules but they will be clocked down to 133MHz (DDR266) or 166MHz (DDR333). In my Solo5 motherboard they run at either 126MHz or 155MHz due a /11 divider.

Good luck hunting motherboards!

[Edit] In a YouTube video I've seen a 2800+ B0 chip that runs on a K8S755M-6LRS motherboard. This motherboard has a SiS chipset. It's worth checking out to find it (or even any other kind of SiS 755 based motherboard).

[xsecret]

I have some fetish for early K8 ES, with ~50 samples in trays. Many of them are dead. Early K8s are extremely weak. The motherboard I used on this picture is an Asus K8M.

It's a very rare sample because Asus finally dropped the K8M months before the introduction of the Athlon 64. No retail Asus motherboard based on the AMD-8000 ever existed.

About K8, all ES manufactured in 2002 (w/ CPUID F.0.1) are quite easy to boot on many VIA motherboard with early BIOS. Early K8 ES from 2001 (F.0.0) are MUCH harder to boot. You need a motherboard with :
- AMD 8111 'Thor' South Bridge : A-Step or B-Step
- AMD 8151 'Lokar' AGP HT Bridge : A-Step

I can't be 100% sure because I already tested once, but putting a F.0.0 2001 K8 ES on a later motherboard will instantly fry the CPU. Putting a F.0.1 2002 K8 ES on a early motherboard will instantly fry the motherboard.

[wren4777]

[xsecret]

Probably, yes.

[wren4777]

[CHips]

Did these 2001-2002 chips already support 64 bits?

[Neon]

I have a AM81001A1 that I would like to test. Is it 2001 or 2002?

Can it be tested on my nForce 3 250 motherboard, or is that likely to fry the chip?

[xsecret]

The date code is just below the part number.

Any early K8 is (very) unlikely to work on a late motherboard like one with a nF3 chipset.

[Neon]

The second line is

D215450 RFB23242

so probably 2002 week 15

Also @Thandor
I have a 2800+ B0 that works on a nForce3 250 motherboard