Is the 1005 beta bios newer than the one on the website dated 6-7-04 but only # 1003?
Is the 1005 beta bios newer than the one on the website dated 6-7-04 but only # 1003?
I can't find that da*n review.... it's the one with the flow chart describing how the pci/agp lock works.... something to do with the need to run asynch to allow the controller to generate multiplle different clock frequencies....
Synch = controller sending the same frequencies everywhere, relative to what HTT is set to.... Asynch = sets controller to send out multiple clock frequencies, telling agp/pci 66/33 and HTT as set.
C
Are you referring to the Anandtech article? http://www.anandtech.com/chipsets/showdoc.html?i=2069Quote:
Originally posted by charlie
I can't find that da*n review.... it's the one with the flow chart describing how the pci/agp lock works.... something to do with the need to run asynch to allow the controller to generate multiplle different clock frequencies....
Synch = controller sending the same frequencies everywhere, relative to what HTT is set to.... Asynch = sets controller to send out multiple clock frequencies, telling agp/pci 66/33 and HTT as set.
C
I don't see anything in the bios like a memory "async" option.
Sync
http://images.anandtech.com/reviews/...t939/synch.gif
Async
http://images.anandtech.com/reviews/...939/asynch.gif
Async uses two clocks that are fed into the NB. The 66MHz clock is supposed to remain constant.
bmg, you beat me to it. :D
YES that's it!
ripped from anandtech.com:
How Does the VIA PCI/AGP Lock Work?
As we talked to more manufacturers at Computex, we became concerned about what might become a serious problem for many of our readers - a VIA AGP/PCI lock on the K8T800 PRO that either does not work at all or one that does not work as intended, providing only very limited overclocking abilities. Anand contacted VIA and talked with engineers to try to find out how the lock was constructed and to try to determine what might be wrong with the K8T800 PRO chipsets that were starting to find their way to manufacturers.
The K8T800 PRO is capable of operating in two modes: synchronous or asynchronous. In synchronous mode, all of the clocks in the system are derived from one external clock generator producing a 66MHz signal. The diagram below can help explain this:
The external clock generator actually produces two clock signals: a 200MHz and a 66MHz signal. The 200MHz signal is used for the initial handshake with the CPU, but the actual running HT frequency is derived from the 66MHz clock input to the North Bridge. The K8T800 PRO North Bridge has an internal clock generator that takes the 66MHz input clock and produces a 200MHz clock, which it then feeds to the Hyper Transport interface within the chip (which in turn sets the CPU clock frequency).
The AGP frequency in this case is also derived from the 66MHz input clock, as is the PCI frequency. When you increase the HT frequency of your K8T800 PRO motherboard operating in synchronous mode, the 66MHz clock is actually what's being adjusted, and thus, all of the clocks including the AGP and PCI clocks are adjusted as well. Obviously for overclocking, this isn't desirable, since the max attainable overclock is now limited by how high your AGP and PCI devices can be overclocked. To put it in perspective, in synchronous mode, most systems will be limited to a 219MHz Hyper Transport overclock, while a working asynchronous mode (AGP/PCI lock) can allow overclocks of close to 280MHz (see nForce3 250 overclocking tests).
One feature of the K8T800 PRO is its support for asynchronous operation through the use of an AGP/PCI lock. The diagram below describes what happens in asynchronous mode:
Here, you see that a second 200MHz clock is generated externally and also fed into the North Bridge. This 200MHz clock is used solely for the Hyper Transport interface, while the 66MHz clock remains present to drive the AGP and PCI interfaces. >>>>>>Thus, when you increase your HT frequency in asynchronous mode, only the 200MHz clock is touched, while the 66MHz clock remains constant.<<<<<<<
So, why is it that VIA's AGP/PCI lock doesn't work all the time? Architecturally, from a high level, everything seems fine. But as simple as our explanation here may be, actually implementing a multi-clock environment is quite difficult. Designs like this require very complicated clock trees that ensure all parts of the chipset receive the same clock signal at the same time. Introducing a second clock to some of the components complicates things even more, as you now have multiple clock trees to deal with and the components running off of different clocks still need to communicate with one another as fast as possible.
Without having low level access to the chipset, your guess is as good as ours as to what's wrong with VIA's AGP/PCI lock. VIA just recently started working on the problem and is searching for a solution, but without even knowing the solution themselves, it's hard to tell whether it can be fixed via a BIOS update or if it will require another revision of the chipset.
LOL,we're all tapping the same article
Unfortunately that tell us what is needed to make the locks work, but doesn't tell us how to get the locks to work on this board. anyway, board is here waiting for the cpu
So, if you put it async mode, how far can you up your fsb?
OPP
uhhh, so can we set this locked or not right now?
So has anyone set Asus support e-mail addy on fire, yet??
C
I e-mailed my Asus contact yesterday about the issue.Quote:
Originally posted by charlie
So has anyone set Asus support e-mail addy on fire, yet??
C
No word back yet.
OPP
Opp,
You tried your Promise card to see how the FX53/939 clcoks?? Better than 940??
C
I called tech support, we'll see what they say. I'll try a highpoint card when the cpu gets here
I'm trying that route too. Maybe someone can detremine if the frequencies are auto locked if you stay in sync mode but up thevfsb. I somehow really doubt it though. :rolleyes:Quote:
Originally posted by OPPAINTER
I e-mailed my Asus contact yesterday about the issue.
No word back yet.
OPP
I don't have a 939 chip yet;)Quote:
Originally posted by charlie
Opp,
You tried your Promise card to see how the FX53/939 clcoks?? Better than 940??
C
So I have never fired up this mobo. I'm just going by you guys here:D
OPP
I'm going to fire mine up tonight. I hope we get this lock working or I don't see any point over the sk8v really.
I don't plan on running the 4 sticks. The fact is I bought the 4 sticks so I could find the best 2 of the bunch and then let it rip.Quote:
Originally posted by µnrealneo²
http://www.x86-secret.com/pics/cpu/s939/banks.png
That's gonna be VERY stressful to the mem controller. :eek:
Good luck getting 4 sticks working nicely together. :)
OPP
If the lock doesn't work, then it's RMA-time for me. By the way, Gigabyte's new 939 nForce3-250Gb board is on its website. Link
Looks nice. Haven't seen it for sale yet.
If the Via doesn't lock then the nVidia 250 chipset will be the way to go.
OPP
I see you are already preparing yourself for the letdown. ;)Quote:
Originally posted by sierra_bound
If the lock doesn't work, then it's RMA-time for me. By the way, Gigabyte's new 939 nForce3-250Gb board is on its website. Link
Looks nice. Haven't seen it for sale yet.
Heh. Well, I'll give the board a try first. We'll see. :)Quote:
Originally posted by xgman
I see you are already preparing yourself for the letdown. ;)
seems to be the same. same chip and read point.Quote:
Originally posted by LilGator
Is the mem volt mod the same as the SK8V ?
well , i can't quite decide if i wanna splash the cash yet on a 939, but might get a 3500+ sell my 3400+ and not be too outta pocket. If so i can get a a8v and mess around with it, can have teh chip on the 16th.
I got a k8v with locks working, well ati card and stable at 250Mhz 1:1, apparently the lock might work some boards, and not on others. Bios and cpu z shows no indication of locking, but still very stable at high fsb's with ati card would indicate it is locked.
Will hopefully find out soon when teh gigabytes will be available in uk, and what other boards will be out soon. Gonna try to our dfi contact from work and see when dfi boards will be available, i want voltages ++
are there volt mods for the GA-K8NSNXP? because the GA-K8NSNXP-939 is the same board just with a diffrent socket.
LonG
http://www.newegg.com/app/viewProduc...131-499&depa=1
The A8V is now at Newegg