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AMD Motherboards & CPUs Questions or comments on AMD products?


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  #1 (permalink)  
Old 2nd October, 2002, 04:26 PM
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Bad NForce 2 preformance with asyncron bus

Hello,

I read the first 2800+ bench with the Asus NForce 2 board. Very good.
But a test with a 2600+ NForce 2 PC2700 and PC2100 was very bad.
The NForce 2 with PC2100 was faster than the PC2700 version?
The test was made by a very good german computer magazine: C´t

The PC2100 was 3-5% faster than the PC2700 version with same hardware. Only PC2100 rams.

It was a preview (release is next monday for the magazine). The said thad the NForce 2 is very slow with asyncron FSB/RAM.
With FSB 166/PC2700 it is very fast. FSB 133/PC2700 (asyncron 133 to 166) slower than FSB 133/PC2100.

And here in germany AMD will release the 2800+ Feb. 2003.

So I will stay with the 8K5A2+
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Old 2nd October, 2002, 04:32 PM
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I have repeatedly stated that this forum topic is not here for, nor interested in any comparisons YOU wish to make. I'm moving your post to AMD Motherboards and CPUs.The EPoX Topic exits to help EPoX users solve problems.
If you post again in this fashion you will be ban.
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Old 2nd October, 2002, 08:21 PM
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This is probably more an issue of the athlons bus speed limitations.

As the Nforce2 provides plenty of bandwith with dual memory controllers the bottleneck is with the CPU bus.
It may be that the ineficency of a async bus makes running 133/166 less efficent than 133/133.

Once you go up to 166 bus on the CPU you can take much more advantage of the extra memory bandwith. Id also expect similar increases when overclocking up to 200+ on the FSB.
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Old 3rd October, 2002, 06:25 AM
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I've read that the Nforce2 boards being reviewed at this time are prototypes. I expect that the bugs will be worked out in the near future.

BRUNO
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Old 3rd October, 2002, 06:33 AM
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What interests me more is the following: What happens when the memory is run at PC2100 speeds and the FSB is at 333mhz???
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Old 3rd October, 2002, 08:29 AM
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Quote:
Originally posted by K6-III
What interests me more is the following: What happens when the memory is run at PC2100 speeds and the FSB is at 333mhz???
With two sticks of memory you "should" get better performance.

But ive not seen this tested yet.
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Old 3rd October, 2002, 01:11 PM
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Quote:
Originally posted by K6-III
What interests me more is the following: What happens when the memory is run at PC2100 speeds and the FSB is at 333mhz???
BINGO!!! That's the million dollar question. I wouldn't trust a person who actually bothered to test 133FSB/166Mem on an Nforce2 board. At the same speed, dual ddr actually already has a higher bandwidth potential. Duh, and as soon as you run asynch, you loose efficiency and so I'm not surprised that the net result is a slight loss of performance.

Someone who knew what he was looking at would have tested it the other way around. It would breath new life into PC2100 (hopefully).
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Old 3rd October, 2002, 01:13 PM
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Quote:
Originally posted by Holst


With two sticks of memory you "should" get better performance.

But ive not seen this tested yet.
Holst, buddy, pal, ..
Any chance you might see an nforce2 prototype go by in your office.. that you could **cough** borrow for a bit.. to benchmark.
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Old 3rd October, 2002, 06:20 PM
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If there was a 4:5 memory divider for the NForce, you could run at 250mhz FSB and have your DDR run at 200mhz with dual channel. Simultaneously, you could still keep your PCI speed at 33mhz thanks to the NForce's PCI lock as implemented on the Asus A7N266-C and expeced on the Epox 8RDA+....
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Old 3rd October, 2002, 08:00 PM
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Quote:
Originally posted by SteveI


Holst, buddy, pal, ..
Any chance you might see an nforce2 prototype go by in your office.. that you could **cough** borrow for a bit.. to benchmark.
I havent got my hands on one yet, once I do it will be benchmarked and overclocked.
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Old 3rd October, 2002, 08:03 PM
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Quote:
Originally posted by K6-III
If there was a 4:5 memory divider for the NForce, you could run at 250mhz FSB and have your DDR run at 200mhz with dual channel. Simultaneously, you could still keep your PCI speed at 33mhz thanks to the NForce's PCI lock as implemented on the Asus A7N266-C and expeced on the Epox 8RDA+....
"apparantly" there are quite a few handy deviders on the boards, im not totaly sure what there is untill I get a production board and final bios. Running a high PSB and lower memory should give be very cool if you dont have great memory (or you want to run crazy bus speeds).

It would be interesting to see how far you can push a XP CPU without any memory limitations (if the chipset can take it)
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Old 4th October, 2002, 07:55 AM
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Are these options real ??? Or are you guys just dreaming of a dream board?

BRUNO
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