I haven't seen much about this lately and I was wondering if this issue was ever really solved. I'll be switching out some major components soon and I'll need to make some decisions regarding hardware. I really am impressed with the performance of the current VIA boards for Athlon procs, but I still have some concerns about stability and bugs. Thanks in advance!
VIA Chipset PCI latency issue
- Thread starter flawedexistence
- Start date
Andy, with all due respect, I'm going to have to disagree. After reading your reply, I checked over at VIAhardware.com and did a search on this issue. What I found deepens my concerns. It appears that VIA's official patch is not particularly effective. There are a number of beta patches available and these seem to be somewhat better. There still seems to be a problem particularly with RAID, SCSI, and SB Live sound cards. I have noted that this issue is generally ignored in reviews of VIA motherboards; again an issue of concern.
I have a 8KHA+ with a Promise FastTrak 66 / Quantum 40GB AS RAID 0. The HD bench from Sandra is horrid in my case before and after the "RAID Performance" patch. I have installed this sucker numerous times but I still can't outperforms a single 7200 RPM drive 
Adul
Elite Member
Soulkeeper
Diamond Member
- Nov 23, 2001
- 6,731
- 155
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what chipsets did this affect exactely ??
i think people just wanna bad mouth VIA
wusses
VIA rocks !!!
i think people just wanna bad mouth VIA
wusses
VIA rocks !!!
That is a somewhat simplistic view.............especially since my info came directly from a VIA website. My understanding is that the issue affects chipsets from the KT133A on up to the current DDR chipsets. Certainly it isn't a problem on everyone's system, and we know that VIA currently has the fastest AMD solutions, but some of us are very concerned about stablility. If I am contemplating $800.00 worth of upgrades to my system, I want to be sure that all the pieces work! It would appear to me that the n-force chipset, although frequently criticized for it's lack of performance and overclocking options may be a better choice. Of course, there is always Intel...........
Maybe, but more probably nothing is "solved":
(a) the Breeze patch 1.9d is faster than VIA's own, that is strange to begin with
(b) a patch is a patch, the chipset itself has a problem
I feel something fishy
soul: the problem is known since long, has been reported all over, is acknowledged by VIA. Why do you think they have posted an official patch? affected are ALL VIA chipset and that makes me suspicious.
SP33Demon
Lifer
- Jun 22, 2001
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(a) the Breeze patch 1.9d is faster than VIA's own, that is strange to begin with
What is the Breeze patch guys? Also, anyone know where I can get the latest 4 in 1 drivers, can I get them from viahardware.com? Never really had the time to look into it
What is the Breeze patch guys? Also, anyone know where I can get the latest 4 in 1 drivers, can I get them from viahardware.com? Never really had the time to look into it
Soulkeeper
Diamond Member
- Nov 23, 2001
- 6,731
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chainbolt VIA is still a good company that i have great respect for
atleast they fixed their problems
atleast they fixed their problems
I have never heard anything about pci latency issues.
I just bought a MSI kt3 ultra aru and have been fighting it trying to get it to stop hickuping the graphics. (frame rate freeze)
I have narrowed it down to the Raid controller. Everytime it freezes, the HD light is on. When HD catches up, it unfreezes.
This sucks, brand new system with ti4400 and the graphics freeze all the time.....
I have all latest drivers, including via 4in1's, raid, bios, ...... i have tried differant pci latency settings in the bios and that doesnt seem to help either.
Raid 0 is supposed to increase performance not kill it.
I just bought a MSI kt3 ultra aru and have been fighting it trying to get it to stop hickuping the graphics. (frame rate freeze)
I have narrowed it down to the Raid controller. Everytime it freezes, the HD light is on. When HD catches up, it unfreezes.
This sucks, brand new system with ti4400 and the graphics freeze all the time.....
I have all latest drivers, including via 4in1's, raid, bios, ...... i have tried differant pci latency settings in the bios and that doesnt seem to help either.
Raid 0 is supposed to increase performance not kill it.
It's actually the Breese patch, so you might not have found it if you had tried searching on that. Here's the link: latency patch.
>I haven't seen much about this lately and I was wondering if this issue was ever really solved.
Yes it has been solved and it's included in the new drivers.
>I really am impressed with the performance of the current VIA boards for Athlon procs,
dude even at the height of the Spin of this so called bug the fastest other chipset could only tie via in 'real world' performance issues. Second it only affected those that had raid. Third if you were to transfer 100Gigs it would probably took 1 second longer than the second fastest chipset to complete. Do you transfer 100Gig or more a day ?
>but I still have some concerns about stability and bugs
Most likely due to the massive FUD and Spin about this issue.
>the problem is known since long, has been reported all over, is acknowledged by VIA.
so what, this is the equivalent of buying a car that's advertized with a speed of 300Mph but then complaining to the company that technically it can only do 299Mhp. Even though you will never ever drive it faster than 120Mph.
Anyone that says that they won't buy Via because of this is giving into FUD and SPIN
Yes it has been solved and it's included in the new drivers.
>I really am impressed with the performance of the current VIA boards for Athlon procs,
dude even at the height of the Spin of this so called bug the fastest other chipset could only tie via in 'real world' performance issues. Second it only affected those that had raid. Third if you were to transfer 100Gigs it would probably took 1 second longer than the second fastest chipset to complete. Do you transfer 100Gig or more a day ?
>but I still have some concerns about stability and bugs
Most likely due to the massive FUD and Spin about this issue.
>the problem is known since long, has been reported all over, is acknowledged by VIA.
so what, this is the equivalent of buying a car that's advertized with a speed of 300Mph but then complaining to the company that technically it can only do 299Mhp. Even though you will never ever drive it faster than 120Mph.
Anyone that says that they won't buy Via because of this is giving into FUD and SPIN
Originally posted by: clstrfbc
I have never heard anything about pci latency issues.
I just bought a MSI kt3 ultra aru and have been fighting it trying to get it to stop hickuping the graphics. (frame rate freeze)
I have narrowed it down to the Raid controller. Everytime it freezes, the HD light is on. When HD catches up, it unfreezes.
This sucks, brand new system with ti4400 and the graphics freeze all the time.....
I have all latest drivers, including via 4in1's, raid, bios, ...... i have tried differant pci latency settings in the bios and that doesnt seem to help either.
Raid 0 is supposed to increase performance not kill it.
Something strikes me as being odd in this case. If your drives are working off the RAID controllers then the Promise 20276 ATA-133 RAID controllers should be at fault. I thought that all chipsets after the KT266 had the IDE separate from the PCI bus. Am I wrong on this or could saturation of the PCI or PCI latency in general, be affecting drives working off the standard IDE controllers (much less the Promise controllers)?
Well, I think you'll be perfectly safe with the latest VIA chipsets. They seem to have corrected such major problems in them. And more, PCI latency issues are critical only for those chipsets that use the PCI bus as an interconnection interface between the north and southbridges. Those new speedy chipsets that use the V-Link interconnect aren't subject to this issue.
Promise IDE controllers ride the IDE bus are are affected by the latency bug.
Explain...
How, why etc.
Explain...
How, why etc.
Because the ONLY IDE contollers that are NOT on the PCI bus are the ones integrated into the south bridge. PCI card IDE/RAID/SCSI cards and any onboard RAID run off the PCI bus. This is true of VIA's KT266 and up, all of Intel's 8xx chipsets, and all SiS chipsets since the 735. For these, the north and south bridges have a dedicated link, whereas in the past they were linked through the PCI bus.
Well, I after trying the 4.37 and 4.38 versions of 4in1 there was no improvement in performance.
3dmark would go from 150 fps to nearly 0 for 1.5-2 seconds durring various portions of the benchmark.
The system would do the same thing in actual games too very annoying in combat games.
I gave up pulled one drive off the raid and plugged it in to the standard IDE controllor (the promise 20276 ATA-133 RAID will only work in raid mode), and did a clean install. Poof no more problem.
I wont switch back unless I get a pci card and go raid 5.
The only pci card I have is the nic. For the benchmarks the system wasn't on the lan though.
3dmark would go from 150 fps to nearly 0 for 1.5-2 seconds durring various portions of the benchmark.
The system would do the same thing in actual games too very annoying in combat games.
I gave up pulled one drive off the raid and plugged it in to the standard IDE controllor (the promise 20276 ATA-133 RAID will only work in raid mode), and did a clean install. Poof no more problem.
I wont switch back unless I get a pci card and go raid 5.
The only pci card I have is the nic. For the benchmarks the system wasn't on the lan though.
Folks, the 4-in-1 driver set does not contain the PCI performance patch. If your board's BIOS hasn't been updated to use the VIA optimized chipset programming, then you need to download and install said patch separately.
regards, Peter
regards, Peter
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