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ALBPM
10th November 2000, 19:13
128MB PC-150 HSDRM modules for $99 with free 2nd day FedEx shipping

http://www.mushkin.com/cgi-bin/Mushkin.filereader?3a0ca94d0d2d5c60273f0a000102054 e+EN/products/990555

Only for tonight....

Paul

Sir Hitech
10th November 2000, 20:37
Thanks for the head-up!

Got me four! Super OC action, baby! http://forums.murc.ws/ubb/smile.gif

DentyCracker
10th November 2000, 20:59
SHI*
I just bought crap "PC133" memory f*ck
AAAARRRGGHHHH!!!!!!!!
/me screams in agony
I saw Micron 7E for $91 today too

xortam
10th November 2000, 21:16
I was eyeing the 128 MB MUSHKIN w/SIEMENS Infineon PC133* special for $79. This will go into a Asus P2B-S v1.03 so I don't think this will o/c above 133 MHz (never tried o/c'ing). I currently have a CAS2 128 module but I don't know how far I can push it. What is the significance of the Siemens Infineon nomenclature (memory chip manufacturer?). Is this the appropriate memory for this system or should I be looking at the budget 133 board? Any suggestions?

Greebe
10th November 2000, 21:26
Xortam, go for the good stuff, at least if you want to use it on a newer MB it'll work fine http://forums.murc.ws/ubb/smile.gif

Anyone remember the prices on memory this time last year? I sure do and boy am I pleased! http://forums.murc.ws/ubb/biggrin.gif

xortam
10th November 2000, 21:40
Greebe, I assume you're referring to the PC-150. I thought about getting it because it might be good for the next MB, but then I started wondering if the next MB might require DDR or (ahem) RBUS memory. I'm very slow to upgrade. I buy very good stuff and use it to death. We're only talking $20 and also I could just get two of the PC-150s and I would have no problem with o/c'ing because I could set aside my current memory. The PC-133 special is limited to one per customer.

spoogenet
10th November 2000, 21:48
What is the significance of the Siemens Infineon nomenclature (memory chip manufacturer?).

Infineon used to be Siemens Semiconductor. Broke away in 1999 to form their own company, will be totally free of Siemens in about 2 years probably. 8th largest semiconductor manufacturer in the world.

Infineon designs/produces memory, DRAM included. So yes, they're your manufacturer and designer.

Hope this answers your question.

b

xortam
10th November 2000, 22:16
Thanks spoogenet.
Regarding compatible memory with my current memory: Still haven't looked at my DIMM but Sandra reports it as: Bank 0 + 1 Memory Module: 128MB 16x(8Mx8)SDRAM CAS2 PC100-222-620, Bank 0 and 1 setting: 64MB SDRAM 7-1-1-1R 5-1-1-1W.

ALBPM
10th November 2000, 22:32
Just a Heads up on the PC150 HSDRAM specs...

CAS 2 Modules (2:3:2) @ 150 MHz
CAS Latency = 2
RAS to CAS Delay = 3
Precharge Delay = 2

They are designed to run at the above settings from 100MHz to above 150Mhz FSB.
So, set them at 2-3-2 after installing them.

Paul

xortam
10th November 2000, 23:05
Screw it. I haven't treated myself to anything in awhile. I'm going for it!!! I just ordered two PC150 HSDRAMs so I'm guaranteed of having 256MB o/c'able memory. I can always sell my other memory if it can't keep up (which it probably can't). I just committed myself to enter the world of overclocking. Guess I'll start there before I go for the slocket and new CPU to upgrade my PIII-450. Look at what you guys gone and did. http://forums.murc.ws/ubb/smile.gif

Rick
11th November 2000, 00:21
I grabbed the Infineon stuff. The next time I switch board it'll probably take DDR and my Celeron doesn't benefit from anything over a 100FSB, so I'll save the $20. Covers the cost of Fedexing it up to Canada anyhow.

Greebe
11th November 2000, 01:44
Pauly, my Crucial (Micron) "7E" mem is marked as PC133 cas 222, but Sandra reads it as 232. Who's right?

Here are my current settings bios settings (at 100mHz).
Trc 5
Trp 2
Tras 4
cas 2
Trcd 2

ALBPM
11th November 2000, 09:21
Greebe, Maybe set the Tras to 2 and see what sandra says.

The Crucial Micron is good stuff and should run past 160MHz with CAS=2, RAS to CAS=2 and Precharge=2.

Pauly

xortam
11th November 2000, 10:09
Say Paul ... how do I interpret the numbers that Sandra reported on my existing RAM (see post above)? -222-620? 7-1-1-1R 5-1-1-1W?

ALBPM
11th November 2000, 10:24
I don't know what the 7-1-1-1R and 5-1-1-1W mean.

Look at the Memory Module info below that.

Mine shows for each 128MB module:

Enhanced Memory Systems 128MB
16x(8Mx8)SDRAM pc152U-232-452(CL3 upto 152MHz)(CL2 upto 152MHz)

I don't know what the 452 means but it does show that the modules are rated to run at 152MHz at settings of 2-3-2

Paul

xortam
11th November 2000, 11:06
I found out some of the info in the ...\Docs\common\qa\det_mem.htm page of the on-line documentaion.
What does the PCx-xxx-xxx marking displayed by Sandra mean?
A: There are many conventions:

PC66/100 SDRAM Intel Specification - Version 1.0 to 1.2:
PCx-abc-defm (e.g. PC100-322-620R) where:
x - Speed rating (MHz). Memory bus speed should be equal or lower than this.
a - CAS latency (cycles). Lower the better (faster), but more expensive.
b - RAS to CAS delay (tRCD cycles). Lower the better.
c - Row precharge (tRP cycles). Lower the better.
d - Read data access time (tAC ns). Lower the better.
e - SPD chip revision. 2 corresponds to SPD 1.2.
f - Design revision. 2 corresponds to Rev 1.2.
m - R for registered DIMMS. 256MB and bigger modules need to be registered.
PC66/100 SDRAM Extended Intel Specification - Version 1.2+:
PCx-abc-ddeefm (e.g. PC100-322-54120R) where:
x - Speed rating (MHz). Memory bus speed should be equal or lower than this.
a - CAS latency (cycles). Lower the better (faster), but more expensive.
b - RAS to CAS delay (tRCD cycles). Lower the better.
c - Row precharge (tRP cycles). Lower the better.
dd - Read data access time (tAC ns). 54 corresponds to 5.4ns. Lower the better.
ee - SPD chip revision. 12 corresponds to SPD 1.2.
f - Design revision. The current is 2 corresponding to Rev 1.2.
m - R for registered DIMMS. 256MB and bigger modules need to be registered.


Looks like my memory is running at CAS 2, RAS to CAS 2 (tRCD), and precharge 2 (tRP) (PC100-222-620) and 6ns read (tAC), SPD 1.2, rev 0 (PC100-222-620). Your 452 number means that you have 4.5ns memory. Still haven't found an explanation of my "7-1-1-1R 5-1-1-1W" numbers.

ALBPM
11th November 2000, 11:20
Thanks Xortam http://forums.murc.ws/ubb/wink.gif

Paul

xortam
18th November 2000, 17:00
Well I just got around to installing my new Mushkin PC-150 memory (installation delayed a few days for various reasons). Seems it doesn't like working with my old memory (see specs above). I moved my old memory to slot 3, installed the Mushkin into slots 1 and 2, and the system would boot up but hang while bringing up the desktop (first time got up to inspecting the device manager). I removed my old memory and everything appears stable so far. I'm glad I landed getting that second stick because that's the only way I'd be running with 256MB now. I haven't tried shuffling the memory around more but I will try later in the day. The BIOS now reports 3-2-2 (SPD) settings where I was getting 2-2-2 (SPD) before with my old memory (shouldn't it be 2-3-2, note 100 Mhz FSB ). Sandra now reports: Bank 0 + 1 and 2 + 3 Memory Modules: 128MB 16x(8Mx8) SDRAM CAS3 PC133U-333-542, Bank 0, 1, 2, and 3 setting: 64MB SDRAM 8-1-1-1R 6-1-1-1W. Odd that it reports -333. I could also try to force the memory timings in my BIOS but there were only two profiles available (can't recall details). Might try newer MB BIOS. Any suggestions to get these to work together? Or I could skip it and go onto trying to overclock with the new memory and ignore the old stick.

------------------

ASUS P2B-S Rev 1.03, PIII 450MHz, Award ACPI BIOS v1010, 128 MB RAM
MYLEX FlashPoint RAID+ (BIOS v2.02N) running RAID 0 on two 9 GB IBM DDRS 39130D Disks
Diamond MX300 sound card, now with MX25 S/PDIF output
Matrox Millennium G400 Max Dual Head - English
NEC 5FG monitor
Logitech MouseMan Wheel
YAMAHA CRW4416S and NEC Multispin 3x CDs
3Com Fast EtherLink XL 10/100Mb TX NIC (3C905B-TX)
US Robotics 56K Voice FaxModem Pro
Pioneer DVD-303S SCSI
Note--All SCSI devices (except disk drives on RAID) are connected to onboard AIC7890 U2W SCSI
Mainly running Win98 v4.10.1998

ALBPM
18th November 2000, 23:43
Set it at CAS=2, CAS to RAS=3 and Precharge time=2

Paul

xortam
19th November 2000, 16:22
Gee, thanks for the obvious Paul.
Mushkin spec'ed the DIMM to run at 2-3-2 and I just assumed that's what the SPD would read but my BIOS set it at 3-2-2. Either there's some problem with my MB/BIOS and this memory or the DIMM EEPROM is not programmed as expected. Going back into my BIOS, I found that I do have complete control of the timings beyond the couple profiles provided. I set the timings at 2-2-2 (since my old PC100 RAM ran that at 100MHz) and the system seems to be stable. Sandra benchmarked the memory a little faster:
3-2-2 gave me CPU 248 MB/s, FPU 226 MB/s
2-2-2 gave me CPU 260 MB/s, FPU 237 MB/s (first run)
---------- and CPU 263 MB/s, FPU 244 MB/s (second run)

Sandra also now reports 7-1-1-1R and 5-1-1-1W just as it did with my old PC100 2-2-2 memory. Apparently those numbers (I assume read and write) are directly related to the memory timing parameters. It also still reports 128MB 16x(8Mx8) SDRAM CAS3 PC133U-333-542 which indicates 3-3-3 timings which are again different from what was detected through SPD. How is Sandra obtaining this information? Are the 2-3-2 timings just what Mushkin has tested this DIMM at when running 150MHz and nothing to do with the SPD programming?

I guess I'll try adding back my old memory and try running with these forced settings. Don't know why it would have had problems running at a slower rate along with the Mushkins.

Greebe
19th November 2000, 16:35
xortam, what cpu,/fsb speed are you running to get those benchmarks?

xortam
19th November 2000, 17:54
The benchmark is from SiSoft Sandra Standard v99.8.5.30 running on Win98 on 100Mhz FSB PIII-450 (system specs are posted above). Those numbers compare against reference numbers for a PIII-500 128MB system getting CPU 280 MB/s and FPU 260 MB/s.

Greebe
19th November 2000, 23:17
I was wondering if you were running the same cpu as those scores didn't look like a PC133 speed scores, hence my question. http://forums.murc.ws/ubb/smile.gif I own Sandra Pro ver, 2000.7.6.49 and wondered if there was a difference between them.