Problems with Kingston Value RAM

[EPoX Tech]

I have noted some problems with certain Kingston Value RAM that may be of interest if you have some PC3200 with a symbol on it as follows :-

[EPoX Tech]

You will find that it has SPD as follows :-

[EPoX Tech]

But this memory isn't nowhere near as good as the SPD and as such to make it run stably 9 times out of 10 on a board that won't increase the voltage you need to come into line with the JEDEC specification of timings such as this stick of JEDEC approved memory (manufacturer not of relevance)

[cadaveca]

I have few sticks of that...but it was not bought as valueram...just sold as generic stuff....what is the issue? (besides that CAS rating, mine is the same)

I have dualchannel kit that has the same timings...


my hyperX has the same SPD settings...but 2.5-3-3-8. Of course , it works @ 2-3-2-6


EDIT:nevermind....

[EPoX Tech]

The memory (don't know who the chip maker is as I haven't had the time to research) is not as good as the SPD that Kingston put on it, so it won't necessarily run stable when set at AUTO or SPD, and needs to be set manually as the third picture.

[cadaveca]

that's kingston's own labelling, i believe. since bh-/ch- has kinda dissappeared, it seems as though kingston is making tsops again.

[cadaveca]

Originally Posted by EPoX Tech

The memory (don't know who the chip maker is as I haven't had the time to research) is not as good as the SPD that Kingston put on it, so it won't necessarily run stable when set at AUTO or SPD, and needs to be set manually as the third picture.

GOTCHA!!! maybe that's why the wife's rig is constanly crashing! How'd ya come across the fix?

[EPoX Tech]

A customer query last Friday that I resolved after he told me the SPD that was reported in BIOS which I commented was out of specification for a standard PC3200 unit and as such offered the fix.

[cadaveca]

Do you think this falls under the p-4/AMD differences in timings? i remember that once it was recommended for CAS2 mem to be run @ cas 2.5 on AMD, and CAS2 on p-4....

[EPoX Tech]

Depending on the ROMSIP, and how it times all actions of the address cycle it will vary how memory behaves, and as such some memory perhaps has its SPD programmed on the assumption of timings found succesful on one chipset and one mainboard whereas good quality branded JEDEC memories will have their timings specified by a thorough appreciation of all common chipsets on both Intel (and VIA/Transmeta) & AMD types of platform.

[Gizmo]

Good stuff, ET! Front Page! www.aoaforums.com

[EPoX Tech]

That's twice this week! Thanks Gizmo!

[robbie]

I'd be willing to bet that this is the CR@P that Marco and I picked up at the show a while back. We returned it the very next show as the stuff wasn't stable and would cause random reboots all the time.
Thanks for the 411!!
Rob

[EPoX Tech]

It's not necessarily crap - just that the SPD is a little over ambitious for the cross platfrom ability.

[nodavilp]

I saw the thread with kingston problems but what about Kingmax 433,that was corrected in last bios for 8rda3+. BUT IT DOSNT WORK!!! My ram still dosent work in dual chanell and cant reach ddr400.So is this solved or not!?
I know this has nothing to do with this thread but I was lasy to send a PM to mister ET

[aJ\/Tg]

Originally Posted by EPoX Tech

I have noted some problems with certain Kingston Value RAM that may be of interest if you have some PC3200 with a symbol on it as follows :

A little more info about this Mosel memory:

Manufacturer: Mosel-Vitelic
Manufacturer: ProMOS (the parent company of Mosel Vitelic)
Part Number: V58C2256804SAT5B
Device Type: DDR SDRAM

AFAIK, used by: Transcend, KingMax, Pmi, Apacer, Kingston, OCZ (removes the original markings and relabels the Mosel-Vitelic and ProMOS V58C2256804SAT5B), Tyan, etc.

SPD 'Serial Presense Detect' (EEP)ROM is not the same as the mostly faster 'Low latency Timing', example: The Kingston HyperX PC2-4300 modules have been tested to run at 533MHz with low latency timings of 3-3-3-10. SPD timings are programmed at JEDEC standard latency timings of 4-4-4-12

Mikhail Ivanenkov Review: Kingston PC3200 ValueRAM 512MB, with the same markings on the chips:
0437PL (first line),
V58C2256804SAT5B (second line),
and P243282IJALC (third line)

http://www.mikhailtech.com/modules.p...t&id=99&page=1

�JEDEC is an organization made up of 300 plus member companies from all over the world. They consist of memory vendor companies like Micron, Samsung, Infineon, Hynix and Nanya. Memory module manufacturers like Kingston, Smart Modular, and Wintec. Connector manufacturers like Molex, and Foxconn. Memory user companies like Sun Micro, Silicon Graphics, and HP. Tester companies like Tektronix, Agilent and CST. Chipset companies like Nvidia, Via and SIS.
Source: Simmtester


Kingston helps set the standard for memory technology. All Kingston memory is JEDEC compliant, an important specification used by leading semiconductor manufacturers. JEDEC sets the standards for semiconductor engineering and is well respected throughout the industry. Furthermore, Kingston has been a member of JEDEC for almost a decade and one of Kingston's top engineers currently sits on the JEDEC board of directors. Kingston product is backed by our extensive experience and expertise.
Source: Kingston



�

[jlccarv]

These are good Mosel revA 5ns. They overclock well at those 3-3-3-x timings...

[gorgue]

I have a pair of those sticks. Mine are reported as CAS3 but works fine at CAS2.5 2.77V. Manufacturer is Mosel Vitelic (now Pro Mos):

[url=http://www.promos.com.tw/website/html/english/product/V58/V58C2256804SA.pdf]

Never had any problem with them, even working over 210.

[EPoX Tech]

Those aren't those sticks then! The problematic sticks are Kingston Value RAM sticks that have CAS 2.5, and no JEDEC voltage augmentation bit set in SPD - i.e. have bad SPD. That is what causes the problem - bad spd and poor PCB implementation.

As for Kingmax - they do not have anything to do with this thread.

[gorgue]

Epox,

mine were Kingston ValueRam also, but with correct SPD (3-3-8). Your batch must have weak performance (poor PCB?), specifications say these chips can do CAS2,5 at 2.6V