Oh my God!

Discussion relating to Socket 7 hardware.
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Uranium235
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Post by Uranium235 »

Yes, the K6-3+ is accurately recognized at bootup by name. I know nothing of programming but it would appear that the BIOS writer left something out of the Write Allocation routine.
I've tested this K6-3+ 400ATZ on other machines and Write Allocation was enabled correctly on them...
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KachiWachi
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Post by KachiWachi »

That would be a pretty big oops...since WA has been around since the Model 6...
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KachiWachi
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Post by KachiWachi »

sylvan -

You should add your board info as a sig. :|

IIRC, your board is an EPoX MVP3G2/5...correct?

I was just reading an article on AnandTech about this board. If it is correct, your TAG should be made by SBT. Unfortunately, it appears to be rated at 8nS...which will leave you stuck at 125Mhz. :(
sylvan2626
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Post by sylvan2626 »

KachiWachi,

Yes, my (current) board is a MVP3G2

Will do on the sig creation.

But on this part...
"I was just reading an article on AnandTech about this board. If it is correct, your TAG should be made by SBT. Unfortunately, it appears to be rated at 8nS...which will leave you stuck at 125Mhz."

Is that why Everest shows the RAM to be 125MHz?

I can boot up in DOS at 133MHz and run memtest86+, but I get numerous errors. Is the TAG responsible for the errors or should I not be able to DOS bootup at 133MHz?

Oh yeah, looks as though this CPU/board combo is not going to make it to 600MHz at any FSB (max core voltage used is 2.1V). It does run rather well at 1.3V...at the lower speeds.
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KachiWachi
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Post by KachiWachi »

First, verify that the TAG is indeed what they say in the article.

EVEREST reading the 125MHz SPD info has nothing to do with that. The SPD info was programmed by the RAM stick manufacturer. You would have to ask them why there is no 133MHz data in the SPD chip for the module. That doesn't mean that you can't manually override those "automatic" settings by setting the timings manually in the BIOS...

At 133MHz, you would have to see who is causing the trouble. It will either be the RAM itself, the Motherboard cache (TAG and/or SRAM), or the Motherboard trace layout.

Articles (Note - sometimes the page does not load...just hit "Go" again and it will) ->
http://www.anandtech.com/showdoc.aspx?i=1030
http://www.anandtech.com/showdoc.aspx?i=1031

I did download a manual for this board (mu-mvp3g102.pdf, Rev. 10.2, September 30, 1999).

"One of those limiting factors is the 8ns Tag RAM present on both boards which is theoretically capable of operation at frequencies up to and including 125MHz, however as we've come to know and love from the RAM industry, chip ratings are not always indicative of true limitations."

Also...yes...set JP5 to "SDRAM = CPU (Default)"...Pins 2-3.

Um...remind me...you are setting higher than 112MHz FSB by software...correct?
Uranium234

Post by Uranium234 »

My MVP3G5, which is virtually identical to the MVP3G2 except for the L2 cache size, will do 600Mhz stable with the K6-3+ 400ATZ with 2.3volts. Temps stay in the low 30 degree Celsius range with a good size Socket A HSF. I'm not worried about the extra V's.

I've overclocked the FSB all the way up to 133 but only with the board's L2 cache disabled. In fact, it won't do any FSB above 100 with the L2 enabled. The only way I got the 133 FSB to work was to change the jumper for asynchronous RAM operation and only then it will only POST. I can run Windows at 124 FSB and run benchmarks but it is too flakey for everyday use. I'm content at 100 FSB with the board's L2 enabled.

I've noticed this board is more stable with a single stick of RAM, if I add a second identical stick then I have to drop interleaving down to 2-way. I use two sticks of Crucial PC-133 2x256MB to stay within the cacheable range.
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Uranium235
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Post by Uranium235 »

Yes, that last post is mine. I couldn't remember my logon password while at work.
sylvan2626
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Post by sylvan2626 »

KachiWachi,

I think that this is the TAG chip markings:
SB61L256B-8
W83194R-58

Currently running at 112MHz FSB x 5 = 560MHz speed. The mobo L2 is enabled, until I can get the RAM issues sorted out. :x

Yes, I am using CPUCool as the Windows FSB adjuster (Thanks, Jim!).
Last edited by sylvan2626 on Thu Sep 22, 2005 7:34 pm, edited 1 time in total.
EP-MVP3G2 Rev 1.0 (8/6/01 BIOS) -- K6-2+ 550ACZ @ 618MHz (103MHz FSB) 640MB PC100

EP-MVP3G5 Rev1.4 (8/6/01 BIOS) -- K6III+ 500ANZ @ various MHz
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Post by Jim »

What happens @ 5.5x112? That is where you want to be. If it takes 2.2v. to do it, I think I would go for it. (assuming that your cache is still working @ that speed.) (But put a heat sink on it first!! - a real one that is).
Superpuppy 3
K6-3+ 450 ACZ (6x100)
DFI K6BV3+/66 Rev B2 (2 Meg) w/ 2x28mm Chipset Fans
2x256 Meg PC 133 Hynix SDRAM
1x 20G Maxtor (7200)
2x 80G Maxtor (7200) Ducted w/ 2x486 Fans Mount
52/24/52/16 LG CDR/RW/DVD
8/4/3/12/24/16/32 LG Super Multi
ATI 9000 aiw Radeon AGP
SB Audigy 1 MP3 Sound
CMD 649 IDE Controller
NEC USB 2 Card
sylvan2626
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Post by sylvan2626 »

Hi Jim,

At 5.5 x 112MHz the PC will complete POST, but BSODs at W2k loading. That is farther than it would go previously. Still running the mobo L2 and RAM timings set to fastest settings.

Maybe if I play around with timings and the mobo L2 something will improve. (Don't really expect anything to happen - still think that it is a core voltage issue.)
EP-MVP3G2 Rev 1.0 (8/6/01 BIOS) -- K6-2+ 550ACZ @ 618MHz (103MHz FSB) 640MB PC100

EP-MVP3G5 Rev1.4 (8/6/01 BIOS) -- K6III+ 500ANZ @ various MHz
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KachiWachi
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Post by KachiWachi »

SB61L256B-8

Yup...that's most likely the TAG (SB = SBT, as noted in the article). -8 would be 8ns, or 125MHz.
Moderator - Wim's BIOS

PC #1 - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128 MB EDO. BIOS patched by Jan Steunebrink.
PC #2 - Amptron PM-7900 (M520), i200 non-MMX, 128 MB EDO
PC #3 - HP8766C, PIII-667, 768 MB SDRAM
PC #4 - ASUS P3V4X, PIII-733, 256 MB SDRAM
PC #5 - Gateway 700X, P4-2.0 GHz, 768 MB PC800 RDRAM
PC #6 - COMPAQ Evo N1020v laptop, P4-2.4 GHz, 1 GB PC2700 DDR
PC #7 - Dell Dimension 4600i, P4-2.8 GHz, 512 MB PC2700 DDR
PC #8 - Acer EeePC netbook, Atom N270 @ 1.60 GHz, 1 GB RAM
PC #9 - ??? ;)
sylvan2626
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Post by sylvan2626 »

KachiWachi,

I omitted the "SBI" on the chip markings.

I suppose that there is no software/hardward solution to the 125MHz FSB cap?
EP-MVP3G2 Rev 1.0 (8/6/01 BIOS) -- K6-2+ 550ACZ @ 618MHz (103MHz FSB) 640MB PC100

EP-MVP3G5 Rev1.4 (8/6/01 BIOS) -- K6III+ 500ANZ @ various MHz
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KachiWachi
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Post by KachiWachi »

Well, IF you can find a TAG with better specs and the same pinout, you can always solder that in...
Moderator - Wim's BIOS

PC #1 - DFI 586IPVG, K6-2/+ 450 (Cyrix MII 433), 128 MB EDO. BIOS patched by Jan Steunebrink.
PC #2 - Amptron PM-7900 (M520), i200 non-MMX, 128 MB EDO
PC #3 - HP8766C, PIII-667, 768 MB SDRAM
PC #4 - ASUS P3V4X, PIII-733, 256 MB SDRAM
PC #5 - Gateway 700X, P4-2.0 GHz, 768 MB PC800 RDRAM
PC #6 - COMPAQ Evo N1020v laptop, P4-2.4 GHz, 1 GB PC2700 DDR
PC #7 - Dell Dimension 4600i, P4-2.8 GHz, 512 MB PC2700 DDR
PC #8 - Acer EeePC netbook, Atom N270 @ 1.60 GHz, 1 GB RAM
PC #9 - ??? ;)
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Post by Jim »

I am going to bump this post before it gets lost. Seems to me it has a lot of interesting information in it, though unfortunately not much in the way of benchmark data to help in deciding which way to go.
Superpuppy 3
K6-3+ 450 ACZ (6x100)
DFI K6BV3+/66 Rev B2 (2 Meg) w/ 2x28mm Chipset Fans
2x256 Meg PC 133 Hynix SDRAM
1x 20G Maxtor (7200)
2x 80G Maxtor (7200) Ducted w/ 2x486 Fans Mount
52/24/52/16 LG CDR/RW/DVD
8/4/3/12/24/16/32 LG Super Multi
ATI 9000 aiw Radeon AGP
SB Audigy 1 MP3 Sound
CMD 649 IDE Controller
NEC USB 2 Card
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