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EVGA 780i Overclocking Guide - Page 40

post #391 of 1607
Quote:
Originally Posted by Robilar View Post
Not a strap issue. 400 FSB has been rock stable for over a month at 8x or 9x and ram is running at 800mhz. It just started locking up (3 times in the last two days). Could be a software issue but unlikely. Why would COD4 lock the system up totally? Also once it happened, I had a disk boot failure and it wouldn't go past the post screen. software issues would not cause that problem.


I went back to 3.2 and ran 2 hours of orthos without a hitch. Wierd.
Symptoms point to hardware. Something wants more voltage now compared to what it initially did.
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post #392 of 1607
Thanks for the info.

Quote:
Originally Posted by SergeRY View Post
I found that after successive runs with SSP<->MCP Ref Clock, MHZ - 200, 225, 250, 275

I get the highest 3dmark06 score with a setting of 250. actually I have just left it there since then and there haven't been any problems.
So that setting is "safe"?

Quote:
Originally Posted by SergeRY View Post
regarding PCIe x16_3 , in SLI you use slots # 1 and 2. If you have pcie 2.0 cards you don't even get an option to adjust the clock. Maybe you can changes lanes 1 and 2 with GTX, ultra G80 cards and should see an performance increase. I did with a gts320 on an ip35 pro ( 100 -> 125 MHz)

there should be no performance increase though increasing slot 3, unless in tri-sli.
... my bad. I was refering to slots 1 and 2, I missed the "3"...

125 is also considered "safe".

What precautions or elements should I be watching when I set these at higher settings?

I'm having problems remaining stable above 4GHz, and I am trying to isolate the issue.

I am little more than an "meh" overclocker, but I have some decent hardware that I should be able to squeeze more out of... I just need some help.



Thanks again for you input. Much appreciated.

+
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post #393 of 1607
Quote:
Originally Posted by Syrillian View Post
Thanks for the info.



So that setting is "safe"?



... my bad. I was refering to slots 1 and 2, I missed the "3"...

125 is also considered "safe".

What precautions or elements should I be watching when I set these at higher settings?

I'm having problems remaining stable above 4GHz, and I am trying to isolate the issue.

I am little more than an "meh" overclocker, but I have some decent hardware that I should be able to squeeze more out of... I just need some help.



Thanks again for you input. Much appreciated.

+
regarding safety of pcie frequency: I left my ip35pro @ 110 MHz, and benched at 125. Higher started to act up a bit and the overall return seemed not to be worth it. actually 125 I set in windows since I get a problem with southbridge communicating with the hard drives = no boot

keep in mind this was a different board and southbridge. I am using pcie 2.0 cards so I can't mess with this setting on the 780i, I *think* it is equivalent to a setting of 200 MHz...

I think setting the frequency higher should be akin to overclocking a FSB. You can pass more data through, but a higher frequency = compressed waveform and amplified errors (instability). I would check for CPU/FSB OC stability with a lower setting, say 100 MHz PCIe. now turn to a mild cpu/fsp and gpu overclock and turn up PCIe, i dunno 110 -125 should be pretty safe, play games benchmark etc. any errors here should be pcie related. one at a time.

as an aside, going from 100 to 125 for 1 card only gave a few hundred points gain in 3dmark06 for a single card. not a big gain, but it may help SLI scale better. try it out!

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post #394 of 1607
Can somebody convince me to buy this? I currently am using a Gigabyte P35-DS3R, which is great for overclocking, but I want to move on to SLI or maybe even tri-SLI in the near future. Does this board overclock well? Also, the DS3R has a severe vdrop issue (on my board it drops by .8v after getting into xp/vista)...how's the drop on this board. Thanks!
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post #395 of 1607
The board overclocks extremely well but the reason you should go would be SLI. Any of the intel P35 boards can match it in cpu OC.

If you want SLI, its the board to go with.
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post #396 of 1607
Sounds good Robilar...is the vdrop on the board horrible? Because if it's somewhat less than my current board's, I'm going to buy the 780i right away and put the P35 in my other rig....
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post #397 of 1607
Its not great but you can pencil vdroop mod the board to compensate.
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post #398 of 1607
Okay I'm pretty sure I'm gonna buy this within the next week. Thanks!
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post #399 of 1607
One the Asus Striker II ( in SLi), PCIe X16_2 ore X16_1/3 125 MHz never know you can gain more points in 3DM06 raising MHz one the PCIe X16!
It makes little bit scene, I am still reading how it works…damm still 20 pages to go looks like a other guide I know.
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post #400 of 1607
Quote:
Originally Posted by Anubis_offline View Post
One the Asus Striker II ( in SLi), PCIe X16_2 ore X16_1/3 125 MHz never know you can gain more points in 3DM06 raising MHz one the PCIe X16!
It makes little bit scene, I am still reading how it works…damm still 20 pages to go looks like a other guide I know.
lol
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