Abit KT7-RAID processor support...

S

(Shovel)

Guest
OK, it has a maximum 133 Mhz SDRAM support, but according to this page on the Abit webby it will take 266 FSB CPUs???
I don't know a great deal about how that all fits together, and I know that the mobo will take up to 1.4 Ghz processors (after my last bios update) but does the information on this page mean I could slick an 266 Athlon XP in?

I am very confused..
 
W

WPKenny

Guest
Read down a bit and you'll see my thread about this. If you have rev 1.3 of the KT7A board then you can load BIOS that will enable you to use chips up to the Athlon XP 2100+.

But yes, you can still only use PC133 memory as a max....well you can use PC150 if you fart about with clock settings.
 
S

(Shovel)

Guest
Whoops, I meant KT7-A-RAID.

It does seem that only the 1.3 revisions are "gaurenteed" to take XPs.. according to SiSoft Sandra mine is only a 1.2.

I'm sure it wasn't meant to take 266 Mhz CPUs though, but the Abit site says it will, so maybe getting an Athy 1.4 266 will do.
Does anyone know if this is accurate? The Mobo was bought in August last year if that gives any indication.
Currently running a Duron 800 and the BIOS has had the "1.4 Athlon" update applied.
 
S

(Shovel)

Guest
OK, I did some BIOS related investigation into the FSB business - resisting the temptation to leave the CPU set to 1.4 GHz... - and, the display is a little confusing.

My understanding is that Durons run at a 200 Mhz FSB. As did the second (first socket) set of Athlons.
Using SoftMenu III you go through and choose the speed and it displays, in brackets a number which I assume relates to the bus speed somehow.
In this case, 800 (100).
If you move up to 1.4 Ghz it says:
1400 (133).

Now, two questions.
1) Do I assume that these 100/133 numbers correspong to the 200/266 business and that I can indeed have a 266 Mhz Athlon winging it's way to my home.

2) It's running at 800 (100), does this bear any relationship with my 133 Mhz RAM, and is it therefore running slower than it could. If so am I right in thinking that the 266Mhz chip will have it running at proper speed?

Thanks.
 
F

FatBusinessman

Guest
I think the 266 bit means it's running at 133 in both directions. Or something along those lines.
 
W

WPKenny

Guest
I think it's something to do with internal and external clock speeds.

Yes, a 100mhz FSB externally can well have a chip that's got a 200mhz FSB internally..or something.

But basically 100/133 does directly relate to 200/266 for the chip description.

So to answer one of your questions, if you've got PC133 memory and you're running the duron at 8x100 then it's running slower than it could do but only if your chip will let you fart about like that. Erm. I don't TOTALLY understand it but I now there's a shit load of difference on my mobo (KT7A rev 1.3) when I run 3dmark with the memory set at 100 mhz or 133mz.

The Abit site can be very vague at times but from my own experience my Athlon Axia-y 1gig runs fine on both 100 and 133 memory settings. But of course, it's faster on 133. Especially when I over clock the chip....currently at 1.33 gigs. (10x133).
 
S

Summo

Guest
Shovel, I'm running the exact same mobo as you (version 1.2) and I've recently installed a 133/266 1.4GHz AMD Thunderbird in it. No probs at all.

Do it, my friend!
 
X

Xavier

Guest
much like DDR memory uses the rising and falling edges of the signal to transmit data at double the specified frequency athlons double the front side bus in the interests of bandwidth - this is sort of an early version of hypertransport which makes life slightly confusing for the uninitiated but basically yes, 100Mhz FSB = 200Mhz CPU bus and likewise 133Mhz - 266Mhz

If your mobo does PC133 memory u can fit a bad-boy 266Mhz tbird and in some cases athlonXP although the SDRAM does its damndest by suffocating the CPU with half the bandwidth it needs - bear in mind the AGP is also using some of it the numbers get very scary indeed...
 
S

(Shovel)

Guest
Right, well in that case I shall get myself a nice TBird Athy then... purely in the interests of getting the most out of my RAM you understand.. bwhahahaha.

.. I think I'll get another 512 MB while I'm at it too... :D
 
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