pci-e frequency

[TMM]

Hey guys, what do you run your pci-e bus at? Is it best to go as high as possible or keep it low?.

Ty:toast:

[massman]

for benching: 125MHz.

daily use: 105MHz.

[cromwello]

bench at 130mhz.

and normal day use is 110mhz. gives big improvements in OC with higher frequency.:)

[2fink]

100 for daily use, 125-150 for benching. have to try out for max oc first ;) but i ran 3dmark @ 140stable!

[nn_step]

Never highier than 150Mhz. keep it stock when not benchmarking...

[andre X_X]

if u use a sata disk for your system, dont go over 125mhz.

[Rovtar]

can you please tell me what graphic d you have(ati or nvidia):D

[tvdang7]

what exactly does the freqency do?

i have sata. and does gaming count as benchmarking?

[massman]

if u use a sata disk for your system, dont go over 125mhz.

not true, most satadisks can handle +125Mhz. If you have a Patadisk, I'd stay sub 85Mhz.

@tvdang7: you'll never see the difference between 100Mhz. or 115Mhz. in games. :)

[Repoman]

What are you talking about? sub85? stock is 100..

[MrSlacker]

I use stock for everyday use, but when I bench, its at 120. However, I didnt really have time to push it higher. Summer vacation started and I am planning on starting benching and testing like mad again.

[massman]

What are you talking about? sub85? stock is 100..

i meant PCI patadisks

[2fink]

i meant PCI patadisks

stock for pci is 33... if you meant 85 for agp divided by 2 for pci you are right ;)

[massman]

stock for pci is 33... if you meant 85 for agp divided by 2 for pci you are right ;)

:D :D

[rob[GL]]

Wow, I didn't know PCI-E frequency could have an effect on benchies... I always just leave it at stock 100MHz...

Do I need to overvolt the PCI-E bus?

[deathman20]

How much does it improve your scores from stock to say 125-130 or even 140Mhz?

[2fink]

only upping the pci-e frequency doesnt help much. but when i up the frequency my card normally oces better (~20mhz on ram)

[CompGeek]

this darn bad axe maxes out @ 109MHz.... i have it there 24/7

[HiJon89]

How much does it improve your scores from stock to say 125-130 or even 140Mhz?
Just increasing your PCI-E Freq. won't increase your scores, but doing so helps greatly in overclocking a lot of new nVidia cards, which in turns increases bench scores. I run 128Mhz all the time.

[MrSlacker]

Just increasing your PCI-E Freq. won't increase your scores, but doing so helps greatly in overclocking a lot of new nVidia cards, which in turns increases bench scores. I run 128Mhz all the time.
I got 80 points increase in 3DMark05 by just changing PCI-E Freq to 120.

[ripken204]

wasnt there discussion of this a while ago and we were told not to increse it?

[nike]

105 24/7, never tried higher lol maybe i shud do, do 78gtx 256 as new cards? :D the discussion was a while ago but i 4got what was told in it

[andre X_X]

not true, most satadisks can handle +125Mhz. If you have a Patadisk, I'd stay sub 85Mhz.
the problem is sata freq somehow related to pcie freq... you might have windows corrupt if you go higher.... if u use a pata disks 130-140+ would be nice for scoring (just as k|ngp|n do)....

[blossa]

I have runned 133 when benching, else I run 101.
What about the HTT-speed? I have run 1150 there. Is that dangerious?

[kiwi]

the problem is sata freq somehow related to pcie freq... you might have windows corrupt if you go higher.... if u use a pata disks 130-140+ would be nice for scoring (just as k|ngp|n do)....

There is no such thing as sata frequency :)

Sata controller can be pci-e thus if you up pci-e frequency too much you have problems with sata disks attached to that controller. Same could be with onboard LAN. A good example is p4gpl-x/P4gd1 boards that don't have fully working locks and you have to up PCI-E freq to get high fsb. However, after 120-125 sata controller stops normally functioning, so you cant use sata disks. But 135 is no problem for benching with ATA hdd and LAN disabled :)

[tvdang7]

ok ill try 125 see how much higher it goes

[Demo]

How does raising the PCIe feq increase OC?

[iguanodon]

For benchs, putting the pci-e @ more than 100MHz will really help getting more point ?

[cromwello]

yeah it should do. well it will at least increase you max overclocks. and in turn more points:)

[Demo]

So im using a WD SATAII harddrive to any PCI feq limits i should take note off?
using an Asrock Dual Sata II also have an old seagate 80GB IDE

[iguanodon]

So, if it's usefull to push more far the OC of the graphic card, why not for 7/7j use ?

[Demo]

So, if it's usefull to push more far the OC of the graphic card, why not for 7/7j use ?


Like what some said, it could mess-up the SATA drive. dunno about this yet, i still need more info about this as im new into this PCIe slot thing altho its been on my mobo for ages and im still using AGP

[iguanodon]

humm, and by putting the sata drive on a pci controler card ?
If we put the pcie @ more than 100MHz, the PCI stay at 33 no ?

[Demo]

humm, and by putting the sata drive on a pci controler card ?
If we put the pcie @ more than 100MHz, the PCI stay at 33 no ?


I my self have no idea on that but some motherboards have solid PCI locks.

[iguanodon]

ok.
asap i get my new MB, i'll give a try (i have a sata raid controller, on a PCI card)

[kiwi]

humm, and by putting the sata drive on a pci controler card ?
If we put the pcie @ more than 100MHz, the PCI stay at 33 no ?


Usually yes, PCI and PCI-E can be both changed separately

[Brama]

Not in nforce4 systems

[TMM]

hmm 140 killed my windows. 130 seems to be no probs 24/7 and i use two Sata drives :toast:

[cirthix]

115 for daily use

[couppi]

Aren't sata 3 and 4 locked? I keep mine at 100 mhz...

[Brama]

On nforce4 systems, that are the most used in todays' high end MBs, the PCIe and PCI frequencies are tied together.

Native Nvidia SATA ports are connected to PCI bus and if you increase the PCIe frequency, you increase automatically PCI too, untill SATA interface (expecially SATA 2) stops to work.

I suggest not to exceed a 10-15% over the standard PCIe frequency (100 MHz) as general rule.

[EOCFqwerty]

115mhz when benching

[Heartfixer]

I found out something strange today. Pushed my P4GPL-X to 130MHz PCIe freq, I need it for high FSB with my Dothan...and my Maxtor 120Gb HDD stopped working. Nothing out of the ordinary, it is just that the other drive, a Seagate Barracuda 20Gb/7200rpm is using an adapter IDE->SATA and it is plugged into SATA port 3. And it works just fine with any PCIe freq :eek:
So my conclusion is that the PCIe freq is messing with the HDD itself, not necesarily with the SATA controller ;)

[Brama]

Nowaday PCs are almost unique systems. What works in one, can fail in others.

The stability when you overclock depends on several variables and the side effects of a simple PCIe frequency enhancement can affect all the chain involved.

Probably your SATA-->IDE converter and/or HD is accepting a wider range of signal speeds than the SATA controller and/or SATA HD.

[vera]

Hi my system is ;

Asus p5k-e p35 chipset
E8200
2x1gb ddr 1066
250gb Seagate sataII Hdd (onboard sata controller)
x1950xt
pci-e frequency at locked 100

I use this config 8x500 daily usage .. orthos small and large fft totally stable .. But sometimes When system is idle windows restarting , I think hdd is cause this issue ... so Should I increase the pci-e frequency ?

[S_A_V]

for daily use: 101MHz
for benching: as high as possible (133-165 MHz, depends on mobo and videocard).

[vera]

for daily use: 101MHz
for benching: as high as possible (133-165 MHz, depends on mobo and videocard).

Is pci-e frequency affect the hdd ?

[DMH]

If it's SATA I believe so

[The0men]

LOLOL I used to run 140 daily. But that was on my 680i. Now I have trouble clocking it at all with my X38.

Shall I need to overvolt PCI-E to get more PCI-E frequency? Or overvolt MCH?

[The0men]

Is pci-e frequency affect the hdd ?

Yes, both the PCI-E lanes and sata channels go to the southbridge.

[velerephon]

wow i thought even by 5 mhz higher u could damage your card.and i hear about 150mhz??i ll try 130 2moro

[IvanAndreevich]

Hi my system is ;

Asus p5k-e p35 chipset
E8200
2x1gb ddr 1066
250gb Seagate sataII Hdd (onboard sata controller)
x1950xt
pci-e frequency at locked 100

I use this config 8x500 daily usage .. orthos small and large fft totally stable .. But sometimes When system is idle windows restarting , I think hdd is cause this issue ... so Should I increase the pci-e frequency ?

Is this a serious question? :clap: Why don't you just try it? Or better yet don't ;)

[The0men]

I did not find any increase in overclock ability for my card.

I think another myth to bust is that we arn't using all the bandwidth so overclocking the bus yeild no result.

While we certainly are not using the whole bandwidth, I did get 250-400 points over a series of three runs with all the same setting on 3d mark 06 by just increasing frequency 10mhz.

I would like more time to play around, but I beleive that it does give small preformance boost, on 3d mark 06, it did in my case.

Any one else like to confirm that?

[[XC] gomeler]

It would make sense as you are effectively decreasing the lag between the CPU and the GPU and therefore making that connection more efficient.

[The0men]

gomeler;2745787']It would make sense as you are effectively decreasing the lag between the CPU and the GPU and therefore making that connection more efficient.

Yer thats what I was thinking, even though I'm not using the bandwidth, the speed is still faster.

[Darkstar782]

Yes it seems to give me a boost, but thats on a Tri-SLI system so I am probably using more PCIe bandwidth than most!

[tiro_uspsss]

On nforce4 systems, that are the most used in todays' high end MBs, the PCIe and PCI frequencies are tied together.

Native Nvidia SATA ports are connected to PCI bus and if you increase the PCIe frequency, you increase automatically PCI too, untill SATA interface (expecially SATA 2) stops to work.

I suggest not to exceed a 10-15% over the standard PCIe frequency (100 MHz) as general rule.

i so dont remember any of that back in the nF4 days :confused: - esp. nF4 SATA ports being on the PCI... I was quite certain they are on PCIe - are u sure your not confusing it with the Silicon Image 3114 that *alot* of nF4 mobos had - cause the SI was connected to PCI...

[STEvil]

Depends on the board and chipset(s) used.

Sometimes SATA is connected to PCI-E and sometimes not.

[S_A_V]

Is pci-e frequency affect the hdd ?
If HDD-controller connected to PCI-E bus - Yes.
If HDD-controller connected to PCI bus - No.

[WoutZoR]

I did not find any increase in overclock ability for my card.

I think another myth to bust is that we arn't using all the bandwidth so overclocking the bus yeild no result.

While we certainly are not using the whole bandwidth, I did get 250-400 points over a series of three runs with all the same setting on 3d mark 06 by just increasing frequency 10mhz.

I would like more time to play around, but I beleive that it does give small preformance boost, on 3d mark 06, it did in my case.

Any one else like to confirm that?

I can confirm that overclocking the PCI-E clock 'does' affact the 3Dmark score.

Specs:
- DFi LanParty LT X38 T2R (11/28/2007 Bios)
- E6600 475x8 (1.4375V Bios = 1.456 CPU-Z)
- 4x 1GB Team Xtreem 6400 CL4 1:1 4-4-4-10 (2.23V Bios = 2.17V SmartGuardian)
- 2x JetWay HD2900XT 512MB Crossfire (Catalyst 8.1)
- Vista Ultimate X64

PCI-E 100MHz 3DMark06: 16277
http://xs124.xs.to/xs124/08060/3dmark06_16277_dfi_x38__pci-e_100mhz_661.png.xs.jpg (http://xs124.xs.to/xs124/08060/3dmark06_16277_dfi_x38__pci-e_100mhz_661.png)
(clickable)

PCI-E 125MHz 3DMark06: 16812
http://xs124.xs.to/xs124/08060/3dmark06_16812_dfi_x38__pci-e_125mhz_675.png.xs.jpg (http://xs124.xs.to/xs124/08060/3dmark06_16812_dfi_x38__pci-e_125mhz_675.png)
(clickable)

I've also noticed less stutter/lag in Battlefield 2 when running PCI-E above 100MHz. For 24/7 I'm running 110MHz PCI-E

[KTE]

OC'ing PCIe on RD790 definitely gives gains between just 100 to 114 and the chipset can raise to 140MHz on most boards I've seen.

[BTK]

125 mhz pci-e = disk boot fail
110 mhz pci-e = control panel wont work

i leaving it @ 100 mhz