Memory mystery..bh5...

[FearoftheNight]

If you have BH-5 chips and you set you cas timing to 3 your comp won't boot? I tried it with both sticks of my hyperx 3200 and neither would boot. I had to clear the bios. Also when I set memory frequency to spd it sets itself to 212 mhz what does that imply? Thanks.

Production date: 18th/28th week of 03. Prior to bh5 disappearance?

Text

Lists the KHX3200 as bh-5.

 

[FearoftheNight]

bump

 

[Auric]

... implies that a replacement under warranty is called for due to an incorrectly programmed EEPROM? However that seems rather unlikely from Kingston. If it was from some other rinky dink assembler that purposely set the BH-5 out of spec for "PC3500" or such when that standard did not exist then maybe it could be expected. Sooo, I would see if a mainboard BIOS update was available first in case it is misreading the SPD? As for CAS, I seem to recall a minor kerfuffle with some DIMM's when 800 FSB boards were first introduced. Why would you want "3" -are you trying to overclock? Prolly better to use dividers like 5:4 instead to achieve a higher bus clock (and thus CPU) and then if anything, reduce the RAM timings to further increase bandwidth. Also, "clearing the BIOS" is actually clearing the CMOS settings. Good luck.

 

[FearoftheNight]

oh i just read in another post that corsair guy said that bh-5 wouldn't accept cas3 and some of this batch was bh-5 so that it would be a test to see if it was bh-5. the spd was me trying to see what the stock speed was

 

[Auric]

The markings should be clear, comme ça. Stock speed should of course be 200, so 212 is cause for concern but if manual settings work fine then mayhaps just ignore it. Perhaps confirm the BIOS readings with ctiaw or CPU-Z or such.

 

[FearoftheNight]

The HyperX have heat spreader that I don't know how to remove. And even if I did I would void my lifetime warranty. It only popped to 212 when I changed it to by SPD but usually I just put it on 100% of my fsb. Dling cpu-z now...

 

[cirthix]

DIVIDERS SUCK!! on an amd system, dividers SERIOUSLY kill performance. on an a64 or p4, the performance hit is not as harsh, but in most situations, dividers will still degrade performance by a good bit

 

[Auric]

I am not familiar with old AMD systems but for general performance, memory bandwidth pales in importance to FSB/CPU frequency which dividers allow to increase when memory cannot otherwise keep pace.

I thought aboot the heat spreaders afterwards... suppose thermal tape makes 'em a ah heck. To identify the chips try SPD Tool under DOS or else ctSPD.

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Bah, nevermind... it's been awhile and not only are those tools old (for chipset support) but I don't reckon the memory chip info would be included anyway. I tried the more up to date SPD Reader (Intel & SiS only) and it did not provide any more useful information than CPU-Z.

 

[VirtualLarry]

I've heard about this whole BH-5/no-CAS-3-setting stuff before, and in another recent Hot Deals thread, with people ordering Kingston HyperX PC3200 from Outpost, apparently some were getting DIMMs made with BH-5, and they were "testing" it by setting CAS 3, and it did result in no boot.

Quite frankly, that does seem a bit pecular to me, but perhaps the BH-5 chips were designed and built with such low latencies in mind, that they don't even function at high latencies? Also heard that they were good to something like 3.2v, which again sounds a bit extreme to me. I wouldn't want to give any DIMM more than about 2.8v for safety. The actual chip specs would tell you for sure though.

I've never owned any BH-5 myself.

 

[FearoftheNight]

virtual larry thats exactly where i read about that stuff....i did briefly here about that elsewhere a whiel ago i believe also based on this thread
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it lists what i have ...the khx3200/512 as bh-5...i was surprised becuase i was checking them earlier and they letter A was not present on the sticker.

Also the cpu-z show production days as week 17 and 28 of 03 which I think was before the disappearance of winbond. So what do you think?

 

[RalfHutter]

I own 3 different dual-channel sets of Mushkin BH-5 (level II) and all of them will boot at CAS3 timings on Intel boards. YMMV!

The BH-5 pruduction was stopped around June/July of '03 so your IC's are very late production, FWIW.

 

[FearoftheNight]

oh man....

 

[FearoftheNight]

can anyone share insight? Are all the khx3200/512's bh-5?