P4 Northwood 'B' at PC1200 ??

We all know that the P4 1.6A has plenty of headroom and therefore it is relatively easy to get it to 2.2GHz and some even 2.4GHz air-cooled. But what can be expected of the P4 2.26GHz Northwood 'B' with 533MHz FSB to be launched in a month from now ?

Will it be possible to overclock it to 600MHz FSB (166MHz bus) corresponding to 2.83GHz ? Together with the new Intel 850E chipset the question is whether the PC1066 Samsung RDRAM will be able to run PC1200 or if the memory multiplier must be backed to PC1066 spec.

Originally I was hoping to build my first AMD based PC with an Athlon Throughbred, but I've lost my faith in AMD's time-schedule. Throughbred was supposed to be here last month, but there is no sign of it at all, and I think that Intel will have Northwood 'B' ready before AMD launches Throughbred. So if the Northwood 'B' 2.26GHz turns out to just as overclockable as the 1.6A, I guess it means no AMD for me this time either.

/Copenhagen

According to xbitlabs the pricing on 26 May will be as follows:

Pentium 4 2.0 A (400): 193 $
Pentium 4 2.2 A(400) : 241 $
Pentium 4 2.26 B(533): 241 $

That is, price difference between 2.0A and 2.26B will be small and you have the benefit of running PC1066 right out of the box without having to bump the Vcore. This could even be an attractive setup to non-overclockers.

/Copenhagen

I read Northwood 2.4A is overclockable to 2.8 with the retail fan. I think Northwood 2.26B will be as popular as P-III 866B in 2000, maybe more.

And it seems current PC800 RDRAM will be soon replaced by RIMM4200. Less heat, lower cost, etc. Samsung said the price will not be much higher than PC133.

Searching for the true, the beautiful, and the eternal

Don't forget, at the end of this year, Intel plans on working on their first dual channel DDR chipset. That would be a good alternative to RDR anyday

"When there's a will, there's a way."

32-bit RDRAM? What? That's at least a year away!

AMD technology + Intel technology = Intel/AMD Pentathlon IV; the <b>ULTIMATE</b> PC processor

http://freespace.virgin.net/m.warn [...] ow.htm#Now says:

Intel i850E chipset (Tehama-E) for the Pentium 4 is expected to be released in the week of May 20th. Tehama-E will support both 16-bit PC1066 and 32-bit RIMM4200 RDRAM (either Dual Channel PC1066 or a single RIMM4200 module, dependant upon the motherboard manufacturers preferences), AGP 8X and the 533Mhz FSB of the P4 Northwood B. Tehama-E is expected to use Intel's ICH4 South Bridge.

from Asus.com (http://event.asus.com.tw/cebit2002/product/mb.htm)

ASUS Value-added Features

Expandability
The ASUS P4T533 is very expandable with support of up to 2GB PC1066 32-bit RDRAM, 6 PCI slots, 4 USB 2.0 ports, and up to 8 IDE devices. Expansion ensures that you get the most out of your investment today as well as in the future.

Extreme Overclocking
ASUS P4T533 offers impressive overclocking options to maximize your system performance:

Easy DIP Switch or JumperfreeTM overclocking from BIOS
Flexible CPU Core Voltage Adjustments in 0.05V increments over defaults
Accurate 1MHz adjustments of system-bus-frequency
Adjustable VIO memory voltage
Adjustable FSB/PCI/MEM ratio
Rock-solid stability
ASUS Reliability
All ASUS motherboards are designed and tested to meet the highest quality standards. Responsive customer support and frequent BIOS and driver updates ensure the fastest, most reliable performance. All ASUS motherboards are backed by a 3-year limited warranty.

Searching for the true, the beautiful, and the eternal

I think that the ASUS P4T533 is going to my next mobo !

/Copenhagen

Less heat. More overclockability. Lower manufacturing cost. Hm some words I heard from Samsung in Seoul representatives but I guess Raystonn or someone else can explain better.

Hm. There are some sites explaining 32-bit RIMM4200 technology but I forgot the links.

Searching for the true, the beautiful, and the eternal

Kennyshin wrote:

Yes, but remember that 2.4A is running FSB 100 which leaves a lot of headroom for the DRCGs and Samsung RDRAM. Both can reach FSB 133, ie. PC1066 spec. The 2.26B however will already be running FSB 133 and we don't now if there will be new DRCGs which are better than the current TI DRCGs used at the moment. Another question is if Samsungs memory modules can go anywhere near PC1200. I'm really not sure whether the best results (taking price into account) is obtained with a P4 2.0A which will be priced at 193 $ comes end of May.

PC1066, i.e 2.67GHz on RDRAM with such a thing sould not be a problem.

/Copenhagen

it doubles the bandwidth sparky.

do the math 2 bytes (16 bits) times 800 (pc800) =pc1600 (you need dual channel to reach 3200) now do b bytes (or 32bits) times 800 (pc800) = pc3200. As you can see this is the reason why you don't need two rimms

Works with sdram and ddr also (64 (this is how wide in bits the memory data path is)/8)(converts it to bytes)times pc133 = pc1050. (62/8)times 266 (pc266) = pc2100



<A HREF="http://www.anandtech.com/mysystemrig.html?id=9933" target="_new"> My Rig </A>

You might want to check out the memory forum. Fatburger has a couple of threads that go into some detail regarding memory.

The higher the better, but remember it's like a pipe. A wider pipe doesn't necessarily push more water than a narrow one, since the narrow one could have really high water pressure (i.e. RDRAM).

<font color=blue>If you don't buy Windows, then the terrorists have already won!</font color=blue> - Microsoft

"Ok, then why are some people saying that the 32bit RIMM4200 is gonna whoop everything else?"

what? good for them. I just laid down the facts. I had no opinion towards it. Your question was what is 16bit vs 32bit and i explained that very clear.

"Thought you said that higher the better. Or is this like dual-channel or something? I thought that all RDRAM was dual-channel?"

higher the better for what? In what context?
is what like dual channel or something?

Rdram, Do you understand the difference between 16bit and 32bit and 64bit with the memory architecture?

if you do not then just don't worry about it. I already explained it all.

(breef explanation)
from 16bit to 32bit on the same architecture (same RDRAM RIMM technology) and the same speed (pc800 for example) it doubles the bandwidth. It DOES NOT make it twice as fast it just doubles the bandwidth. When you have a 1 lane highway and you make a 2nd, does that make you go twice as fast? no it doesn't. It just increases the bandwidth.

this is the best anology if you don't get it then you just don't get it.

keep in mind the next generation RAM is pc1066 at 32bits that makes it your PC4200. That is just having one RIMM! There isn't one DDR DIMM that can provide such bandwidth. I'll just assume here, but i would think that is what all the "this is the best since sliced bread" is coming from. Put that in dual channel RDRAM and you got 8.4GB/s bandwidth! which is just a huge amount of bandwidth.

do you understand the difference between single and dual channel?

now 16bits at pc1066 is only pc 2100 or 4200 with dual channel. ok?

understand now? if not please ask specific questions of where you are confused.



<A HREF="http://www.anandtech.com/mysystemrig.html?id=9933" target="_new"> My Rig </A>

ahh ya as fatburger was saying. You can make it faster also.

You have sdram at pc133 and rdram at pc800. If you made both at 16bits sdram is only 266 while rdram is 1600. So yes speed also makes a huge difference also.

<A HREF="http://www.anandtech.com/mysystemrig.html?id=9933" target="_new"> My Rig </A>