Clarification needed on AMD760 and KT133 chipsets

[Haervii]

Ok, I understand that with the AMD760 chipset, you can use DDR SDRAM which is supposed to increase performance. Beyond that, are there any differences between AMD 760 and KT133?
Since they are made by two different companies, sure there might be minor differences, but it sounds to me like they can take the same chips.

Now correct me if I'm wrong, but &quot;Pendomino&quot; and &quot;Mustang&quot; are versions of Athlon that will have a 266Mhz bus instead of 200. But wouldn't these chips also work with a KT133 mobo? After all, it is called KT>>>133<<< and not KT100.

If this is true, I don't see many advantages in AMD760. 10% better performance? Or, ok maybe 15-20% better with PC2100. Still that isn't much. Is what I say true about these upcoming chips working with KT133?

Thanx for any replies.

 

[Moonbender]

There are some more differences. I suppose the new chipset will support UDMA100, but DDR RAM is, of course, the major difference.
About running Mustang and Palomino on KT133 boards, I seriously doubt that will work out well. The KT133 stops working correctly at a FSB of about 110 Mhz, so they could never reach the 133 Mhz DDR bus of the CPU. Maybe you can run a Mustang at 100 Mhz FSB, but that'd be a shame

I don't know how much faster DDR RAM is compared to standard PC133 RAM, I saw a figure og about 20%, but no real benchmark.

 

[Haervii]

Then why the hell is it called KT133?

 

[kuk]

What VIA has done is actually unlinking the FSB speed from the Memory speed. The memory runs at 133mhz ... and thus KT133.

The FSB runs at 100mhz, but communicates by DDR, yealding an effective 200mhz FSB.

 

[ares32585]

-The AMD760 chipset will have suppoort for PC1600 or PC2100 DDR SDRAM, Ultra ATA100, 200 or 233mhz fsb processors.
- I plan on buying a motherboard with the new chipset and DDR SDRAM because I need to upgrade anyway. Also...
On Crucial.com, they have DDR SDRAM prices listed...
PC1600 DDR SDRAM costs the SAME as PC133 SDRAM, PC2100 DDR SDRAM only costs $7 more. I think paying the extra $0, or $7 respectively is worth the 10 - 15% difference. Keep in mind that right now Crucial is only selling to motherboard manufacturers, and the price might change for the public.

 

[Haervii]

Ares: Well, the problem is the price of the motherboards and the time it will take to get motherboards that can OVERCLOCK on the market. and PC2100 RAM will be useless until 266Mhz Fsb processors come out.

 

[Howard]

Yup. FSB and memory speed must be synchronized for it to be running properly.

 

[hans007]

coudln't you just take a 100fsb socket a athlon and change the little thngs on top, so the multiplier was lower to run it at 133?

 

[Methodical713]

I disagree with you all

I believe the biggest thing about the 760 chipset is the fact it supports dual (and more, when used with other 760 chips) CPU's.

The way i see it, the faster memory is there to serve the duallies better... although helps a single proc.

think about it.. the reason most of us aren't running dual CPU's is that the performance gain isn't that great even with properly multithreaded applications.. you could expect a 50% increase....

the switching architecture and high bandwidth memory will make duallies worth lusting after... ahhh.. cant wait...

 

[Noriaki]

AMD760 supports DDR SDRAM RAM at 100(200) and 133(266)Mhz.
The KT133 supports only SDR SDRAM at 100 and 133Mhz.

The AMD760 supports both 100(200) and 133(266)Mhz FSB.
The KT1333 supports only 100(200)Mhz.

The AMD760 supports ATA100, but via just announced the 686B southbridge, which is pin compatible with the 686A, so a slight hardware revision can give the KT133 ATA100 as well. But anyhow with an IBM75GXP topping off at about 37MB/s ATA100 is kind of a moot point...ATA66 is fast enough for 95% of people configs.

And IMHO the big advantage of the 760 (well actually the 760MP) is SMP for Durons and Athlons.

As far as CPU support, I think the KT133 will support *any* SocketA CPU but only the versions at a 100(200)Mhz FSB. If there are Palimino, Mustang and Morgans all at 100 as well as 133 the KT133 should support though. The Morgan (new Duron) will almost definately be available at 100(200) FSB, I'm not sure about the other two (new Athlon and &quot;Xeon&quot; Athlon)

The KT133 does not support a 133(266) Processor bus, as was mentioned the 133 is only reflective of memory speed.

 

[Templeton]

The 760 wil Not support smp, you are going to have to wait for the 760mp that should debut in January to get your dual athlons.

 

[JonJon]

Hans007....dropping the multiplier to raise the FSB to 133 will not work b/c the EV6 Bus on the athlons cannot handle that much data, reguardless of CPU clock multiplier.....

 

[Jumpem]

The new DDR processors are to be announced Monday.

 

[Haervii]

I know those processors are to be announced Monday, but which ones? Mustang, Morgan, Palamino? More 200MHZ FSB or new 266Mhz FSB? Or are we going to learn all of this?

 

[Mark R]

The new CPUs expected on Monday are supposed to be Thunderbird, rather than Mustang or its derivatives.

 

[Haervii]

Hate to tell ya, but, uh, T-birds are already out. They have been out for about, say 4 or 5 months. Unless you mean 266Mhz versions. If THATS true, SWEET

 

[hans007]

no someone said that you couldn't use pc2100 on theh 760 until the 133 bus ones come out, but couldn't you just get a 1200 /100 one and run it at 1200/133 (9x multiplier)