Anyone got Mushkin Rev. 3 memory?

jimmygates

Platinum Member
Sep 4, 2000
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I was wondering if anyone bought Mushkin's REV. 3 memory and couple reply or PM me with the numbers on the chips? I got some Siemens Infineon memory sticks from my distributor and wanted to see how close this resembled the new Rev.3 memory..:)



-Jimbo
 

Aboroth

Senior member
Feb 16, 2000
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Well for one Rev. 3 is guaranteed to do 150@2-2-2, and you don't have to worry about it not going that high. The Rev. 2 is only guaranteed up to 133@2-2-2. We all know it will go higher, but how much higher probably varies between modules.

I also don't think jimmygates was asking if he should buy it, just asking for the numbers off the chips.
 

jimmygates

Platinum Member
Sep 4, 2000
2,134
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I'm just asking the number of the chips. My distributor sent me some samples of some new Infineon memory sticks. I wanted to know how close were his samples compared to Mushkin's Rev. 3. If it's the same thing, then I would be getting a significant discount (and maybe pass the savings on to you guys in For Sale Forum ;)).




-Jimbo

 

MushkinTechs

Junior Member
Nov 30, 2000
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Just because the memory chips on the memory module you received are the exact same kind as the ones on the Mushkin High Perf. REV 3 modules, it does not mean that the memory module you received will perform equally well as the Mushkin High Perf REV 3 modules. There are two parts that go into the equation of determining a quality DIMM: the DRAM chips themselves and the PCB (Printed Circuit Board). Both parts of this equation carry an equal weight, meaning that if you have some very high performing and ultra reliable SDRAM chips on a poorly manufactured PCB, the memory chips won't live up to there true potential.

What goes into a quality PCB:

* Minimum and maximum trace lengths for all signals on the module
* Precise specifications for trace width and spacing
* 6 layer PCB's with unbroken power and ground planes
* Detailed specifications for the distances between each circuit board layer
* Precisely matched clock trace lengths, as well as routing, loading, and termination requirements
* Series termination resistors on the data lines
* EEPROM programming must follow detailed specifications
* ElectroMagnetic Interference Suppression

As you can see there is a potential for a lot of differences between PCB's, so even if you do have the same chip you've only won half the battle.

Another difference between your module and our High Perf. REV 3 module is the fact that the Siemens Infineon memory chips on our High Perf. REV 3 modules are hand picked for there overclockability.
 

LXi

Diamond Member
Apr 18, 2000
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MushkinTechs:

I have to tell you this, its a big bummer that you guys programed your CAS2 RAMs to run at 3-2-2, why? People with MicroStar K7T Pro/Pro2/Pro2A series motherboards will have their 4-way interleaving turned off if they manually adjust the timings, only with "auto" setting does the board allow 4-way interleaving, and in that case, it will run SPD default which is 3-2-2. Do you guys have a solution for all these MicroStar board owners to have 2-2-2 and 4-way interleaving at the same time?
 

John

Moderator Emeritus<br>Elite Member
Oct 9, 1999
33,944
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MushkinTechs, welcome the AnandTech. :)

I have (2) pieces of the new Rev3 memory since I wanted to compare it to my Mosel Rev2. The chips have the following markings.

Infineon
HYB39S128800CT-7.5
C2 SEE46558

They are singele sided dimms on a black 6 layer PCB

I an running them at 155 cas222 on a CUSL2-C. One thing I find odd is that SANDRA reports Enhanced Memory Systems 64MB 8x(8Mx8) SDRAM PC133U-222-542 (CL3 upto 143MHz)(CL2 upto 133MHz)
 

MushkinTechs

Junior Member
Nov 30, 2000
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<< I have to tell you this, its a big bummer that you guys programed your CAS2 RAMs to run at 3-2-2, why? >>


Our PC-150 HSDRAM, REV 2, and REV 3 modules have there SPD programmed for 2-2-2 and 2-3-2 for the HSDRAM module. We used to program the SPD's for 3-3-3 but we have stopped doing that. We have never programmed the SPD for 3-2-2. I will get out my MSI motherboards tomorrow and see if I can reproduce this problem.



<< SANDRA reports Enhanced Memory Systems 64MB 8x(8Mx8) SDRAM PC133U-222-542 (CL3 upto 143MHz)(CL2 upto 133MHz) >>


I'll look into this as well.
 

John

Moderator Emeritus<br>Elite Member
Oct 9, 1999
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I wouldn't look too far, SANDRA is notorious for reading the SPD in a weird fashion.
 

LXi

Diamond Member
Apr 18, 2000
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MushkinTechs:

My mistake, I saw your post a while ago explaining why the Rev2 isn't 2-2-2, but instead 3-3-3. Can you please visit this thread and help them out with their MSI board, and for your information, here is the HardOCP review of the MSI board that explain how their BIOS work with RAM timings.
 

MushkinTechs

Junior Member
Nov 30, 2000
18
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<< My mistake, I saw your post a while ago explaining why the Rev2 isn't 2-2-2, but instead 3-3-3. >>



You make it sound like the REV 2 module is a 3-3-3 module. Just so we're clear on this, the REV 2 module is a 2-2-2 module but the SPD of the modules used to be programmed for 3-3-3. Customer complaints got this changed and the SPD's on the REV 2 and REV 3 modules are now programmed for 2-2-2. The SPD of our PC150 HSDRAM is now programmed for 2-3-2.

Thanks for bringing that thread to my attention, I'm trying the best I can to find time to get on the forums and answer questions.

 

LXi

Diamond Member
Apr 18, 2000
7,987
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<<You make it sound like the REV 2 module is a 3-3-3 module.>>

Not really, I know full well that the Rev1.5/2/3 are 2-2-2 capable but instead programed to 3-3-3 to for whatever reason. I thank you in advance for those MSI K7T series with Mushkin RAM owners for your help.
 

Guilty

Senior member
Nov 25, 2000
427
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I have the described problem of owning Mushkin REV2 set to 333 and a MSI Pro2a myself, but I must say it's not mushkin's fault. MSI strayed from standards by not allowing manual controlling of the timings, perhaps so people wouldnt mistakenly force their CAS3 ram to CAS2 and run into problem. But hopefully MSI will address this in a BIOS update.
 

LXi

Diamond Member
Apr 18, 2000
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<<MSI strayed from standards by not allowing manual controlling of the timings>>

This is not true, MSI does allow manual controlling of timings, only with 4 way interleaving as trade off. This behavior is not unique to MSI, my Asus P3V4X also does that.
 

joeryu

Golden Member
Sep 14, 2000
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yeah, i would like ram with 133 2-2-2 programmed into the SPD so my pro2a can set it at that, right now my only choice is cas2 without 4 way or cas3 with 4 way, and i get better results with 4 way cas3, but i know my infineon runs 133 2-2-2 4 way no problem cause it ran like that in my abit, i really hope a BIOS update will fix this.
 

Guilty

Senior member
Nov 25, 2000
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So its 222 without interleaving or 322 with interleaving? I havent setup my board yet so I'm not sure of it's exact options.
 

LXi

Diamond Member
Apr 18, 2000
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Like Mushkin said, their newer Rev2/3 RAM are programmed to 2-2-2, but if you got an older version, you'd probably have to wait for new BIOS, or enable 4 way interleaving with WPCREDIT.
 

MushkinTechs

Junior Member
Nov 30, 2000
18
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For those of you with MSI K7T Pro 2 or 2-a motherboards, try the latest BIOS release. Revision 2.0 of the BIOS that is available here supposedly fixes problems with the built-in 4-way memory interleave function.