Corsair PC150 512MB DIMMS are nowhere near PC150!

[LuciferHaze]

Too many f*cking replies! How's a guy to respond when 2000 others have already said what I wanted to say!?!

 

[Bozo Galora]

first uncheck DMA everywhere in Dev. Man
try changing the HDD bios setting to lowest PIO mode available.
your HDD may be the prob
IBM 75GXP 30 best for high FSB boots

 

[sharkeeper]

I don't think the HDD has anything to do with it. 133 MHz = 33 MHz PCI. What I've found is the highest I can run 2-2-2 without fsckups is 125 MHz. Higher than that is a no-go. :|

Cheers!

 

[thermite88]

sharkeeper:

<< I should have the equivalent tomorrow from Crucial. >>

How does the Crucial compared to the Corsair in your setup?

 

[limsandy]

Charles,
Edit: Kingmax memory modules use 6.6 ns RAM. Check out the memory compuwiz sells. I heard he got some good stuffs.
I'm also running Infineon PC133 256 X 2 running at 150 MHz, CAS 2.

 

[limsandy]

And oh, I bought it when the price was around $120 a piece, damn it.

 

[limsandy]

at memman.com

 

[thermite88]

I received the following from David.

I would reply in this thread but I've been banned from the forum so here is my findings:

The Crucial memory works beautiful at 133 2-2-2! No problems at all. It does NOT even post at 150 MHz. That's Abit's fault. I put the same cpu and HSF in an Iwill KK266R and even the Corsair runs at 150 3-3-3. The Corsair will absolutely NOT run at 133 2-2-2 even in the Iwill, however! The Crucial runs at 150 2-2-2 in the Iwill, I've even gone as high as 157 2-2-2 and the Crucial runs fine. With CAS 3 latencies, the Crucial hits 170 MHz but my pci peripherals cannot keep up! The Crucial memory rocks, one can't beat it for $61.50 for 256 MB stick, SHIPPED!

Cheers!

 

[WaTaGuMp]

Hahahaha thats a farging joke. Its Abits fault. Like i said in my previous post i run my Corsair 150 mhz ram at 155 FSN CAS2 timming, turbo mode 4 way interleave. ON AN ABIT VH6 II MOBO. Ther is nothing wrong with Corasir memory except its cheaper now then when i bought it.:disgust:

 

[sharkeeper]

<< Hahahaha thats a farging joke. Its Abits fault. Like i said in my previous post i run my Corsair 150 mhz ram at 155 FSN CAS2 timming, turbo mode 4 way interleave. ON AN ABIT VH6 II MOBO. Ther is nothing wrong with Corasir memory except its cheaper now then when i bought it. >>



<sigh> Please READ and UNDERSTAND my original post!

First of all, your board is 440BX based, mine is VIA KT133A based, and secondly (this has the most significant difference) my DIMMS have 32MB chips on them!!! Everyone (people that make Corsair and Crucial memory!) tells me that is why they won't run at those timings!

My KT7A doesn't post at any FSB higher than 145 PERIOD. The Asus A7V133 Rev. 1.04 has a problem with these 512 MB PC 150 Corsair modules. Robert Pearce at Corsair Micro has confirmed this as well. He said they are investigating this currently.

I'm using the Corsair PC 150 memory at 133 333 on my KT7A currently because I *need* 1536 MB of RAM.

The KK266 is nice, but I have several issues with this board. Using a modded 515 bios (AMI 2.5) yields decent performance, but 150 MHz FSB causes timing issues with my sampling hardware. At 153 MHz FSB I got corruption! It appears that the 60 GXP drives cannot deal with a PCI speed >38 MHz. My cpu prefers 1.90V or so to run at 1.533 GHz so if I want to run at 133 MHz (11.5 multiplier) I need to modify the board. I have a 1.33 GHz AYHJA coming Monday that should hit 12.5 x 133 so we'll wait and see.

Cheers!

 

[johneetrash]

maybe your motherboard cant work reliable at 150fsb, i know my a7v is only stable up to 147mhz and wont really go any higher keepign 100% stability

 

[John]

<< That is why both Mushkin and Corsair use Infineon chips in their hand-picked PC150 modules. >>



Out of all the Corsair cas2 PC150 I have seen, including my own, they use Micron 7E chips, not Infineon. My pair of 256MB modules dance at 158 cas2, and 168 cas3.

 

[sharkeeper]

<< My pair of 256MB modules dance at 158 cas2, and 168 cas3. >>



Yes, I had very similar results with Crucial PC133 CL2 modules. Of course these are half the density of the Corsair 64x64 modules. I was told by Crucial that they don't expect to have memory of this density (other than ECC server memory) until summer's end. That's why my Corsair modules have Infineon chips on them.

That's fine by me because I should have a KG7R by then.

I should really throw in the towel to o/c and just get a Tyan SMP board and be done with it. :Q

Cheers!

 

[Kingofcomputer]

the issue here is not about the mb,
it's about corsair pc150 dimm uses pc133 chips and the spd is not written as 150, that's cheating, so corsair really picks the right name - corsair.
mushkin at least says the rev3 is pc133 tested to run at 150 ok, they don't claim it as pc150.