silvertop Posted April 29, 2013 Share Posted April 29, 2013 Anyone try this and find out what the limit is? Quote Link to comment Share on other sites More sharing options...
Khenglish Posted April 29, 2013 Share Posted April 29, 2013 Anyone try this and find out what the limit is?I think 5150 joker tried it since he was running x8 2.0. He couldn't even get 10% Quote Link to comment Share on other sites More sharing options...
Founder Brian Posted April 29, 2013 Founder Share Posted April 29, 2013 Mines pcie 3.0 but anyway bclk overclock just made it unstable. I'd stick with multiplier only.If you have an lga 2011 board and something like 3820 then bclk should work fine in a single card. Sent from my GT-N7000 Quote Link to comment Share on other sites More sharing options...
silvertop Posted April 29, 2013 Author Share Posted April 29, 2013 Running at 108 MHz PCI-E now. Any higher and my 1880 refuses to load its BIOS. Quote Link to comment Share on other sites More sharing options...
capchaos Posted April 30, 2013 Share Posted April 30, 2013 Mine is running on 105MHZ now and is 100% stable.I run at 125 bus blk with my 3820. Tri sli titans. 3820 is at 4.8 and with pci e 3.0 nvidia patch Quote Link to comment Share on other sites More sharing options...
Founder Brian Posted April 30, 2013 Founder Share Posted April 30, 2013 Mine is running on 105MHZ now and is 100% stable.I run at 125 bus blk with my 3820. Tri sli titans. 3820 is at 4.8 and with pci e 3.0 nvidia patchWhat patch? Quote Link to comment Share on other sites More sharing options...
capchaos Posted April 30, 2013 Share Posted April 30, 2013 The one to allow pcie3.0 on lga 2011 boards with nvidia drivers Quote Link to comment Share on other sites More sharing options...
silvertop Posted April 30, 2013 Author Share Posted April 30, 2013 25% OC! That's insane! I wish the Areca cards could go higher. The 1800 series have some sort of protection built in that shuts them down somewhere around 109MHz. The 1600 series did not and I remember if you went higher than about 115 or so it would beep rapidly and the logs would show 1bit DRAM errors so they are probably playing it safe. It does provide over 100MB/S extra bandwidth (if you need it) on storage arrays going from 100 to 105 for example. I know the controller is good here just wanted to make sure the graphics cards could take it. I know AMD cards don't do well in an overclocked pci bus environment. It would be subtle but flickering pixels could be seen on the desktop, for example. Quote Link to comment Share on other sites More sharing options...
cx-ray Posted May 2, 2013 Share Posted May 2, 2013 125 bclk is strapped on SB-E. The PCIe bus should be running at default 100MHz then. Quote Link to comment Share on other sites More sharing options...
wuannai Posted May 4, 2013 Share Posted May 4, 2013 107Mhz at the moment and no issues so far. Still testing... Quote Link to comment Share on other sites More sharing options...
silvertop Posted May 4, 2013 Author Share Posted May 4, 2013 125 bclk is strapped on SB-E. The PCIe bus should be running at default 100MHz then.Yes that would make sense as 125MHz PCI-E is awfully high! Quote Link to comment Share on other sites More sharing options...
Phishy714 Posted May 9, 2013 Share Posted May 9, 2013 I always thought that overclocking the PCI-E slot was a REALLY bad idea..?Since a single TITAN doesn't fill the entire bandwidth of the PCI-E express slot, what's the use in overclocking it? Quote Link to comment Share on other sites More sharing options...
Founder Brian Posted May 9, 2013 Founder Share Posted May 9, 2013 I always thought that overclocking the PCI-E slot was a REALLY bad idea..?Since a single TITAN doesn't fill the entire bandwidth of the PCI-E express slot, what's the use in overclocking it?There's no use at all from a performance perspective.Sent from my GT-N7000 Quote Link to comment Share on other sites More sharing options...
Khenglish Posted May 9, 2013 Share Posted May 9, 2013 I always thought that overclocking the PCI-E slot was a REALLY bad idea..?Since a single TITAN doesn't fill the entire bandwidth of the PCI-E express slot, what's the use in overclocking it?I'm not sure how the rumor started that overclocking PCI-E was bad. Maybe it's a throwback from the fsb days where overclocking AGP also overclocked the ATA, sometimes causing HDD corruption. The fact is that there is nothing bad about it. BCLK does not overclock the SATA. FSB/BCLK overclocking was done frequently by eGPU users on 4 and 5 series chipsets, and there were no negatives except possible instability.From a performance perspective though it is extremely minor with just 1 card. Not really worth trying unless you're on x8 2.0 or worse IMO. Quote Link to comment Share on other sites More sharing options...
silvertop Posted May 10, 2013 Author Share Posted May 10, 2013 There's no use at all from a performance perspective.Sent from my GT-N7000High end storage controllers definitely see a boost when PCI-E speed is increased. Quote Link to comment Share on other sites More sharing options...
Boomer Posted May 10, 2013 Share Posted May 10, 2013 High end storage controllers definitely see a boost when PCI-E speed is increased.Current SAS 6Gbps RAID on Chip controllers cannot fully utilize PCIe 2.0 x8 bandwidth. But for next generation SAS 12Gbps RoCs, PCIe 3.0 x8 is required. Quote Link to comment Share on other sites More sharing options...
silvertop Posted May 10, 2013 Author Share Posted May 10, 2013 Current SAS 6Gbps RAID on Chip controllers cannot fully utilize PCIe 2.0 x8 bandwidth. But for next generation SAS 12Gbps RoCs, PCIe 3.0 x8 is required.I have benchmarked it both ways and the increase is nearly proportional with increase of PCI-E speed. It may not be an issue with interface bandwidth per-se but host XOR clock speed "tracking" with PCI-E clock. In other words the XOR is being overclocked. This occurs with Areca hosts. Quote Link to comment Share on other sites More sharing options...
Boomer Posted May 10, 2013 Share Posted May 10, 2013 I have benchmarked it both ways and the increase is nearly proportional with increase of PCI-E speed. It may not be an issue with interface bandwidth per-se but host XOR clock speed "tracking" with PCI-E clock. In other words the XOR is being overclocked. This occurs with Areca hosts.Great! RAID controllers can be overclocked too... I always used LSI RoCs since LSI SAS1068, but now I cannot try this out because my current motherboard is Supermicro X9DRG-QF which have no overclocking options at all. Quote Link to comment Share on other sites More sharing options...
vacaloca Posted May 12, 2013 Share Posted May 12, 2013 Not sure about overclocking, but when I was running Windows 8 I attempted to change PCI-E latency timings to avoid some BSODs. Ended up having to revert back to Windows 7 because it wasn't stable. This was a few months ago, when Win8 was relatively new so it's possible that those issues are gone now. Quote Link to comment Share on other sites More sharing options...
Raffster Posted August 7, 2013 Share Posted August 7, 2013 I used to run all my boards with at least 115 MHz PCIE speed for years. That can rise Fps in some cases, especially when running out of VRAM. Well, with a Titan you simply can not run out of graphics RAM , so the benefit from PCIE overclocking is low. Of course you can still try rising the clock on PCIE 2.0 board since Titan is a 3.0 card and my benefit around 1-3 percent. Why not? My new Asus 990FX Sabertooth with PLX for PCIE 3 can't even run @ 108 MHz, I get strange stuttering above 105 MHz ... guess the PLX is the bottleneck. But generally, recent GPUs can go far beyond 110 MHz on the right rig. Greetings from Germany, Raff Quote Link to comment Share on other sites More sharing options...
Skelther Posted August 31, 2021 Share Posted August 31, 2021 Its very old topic but can someone explain me is overclocking pci-e is beneficial in any significant way without SLI? Wanna try this on X58 - is PCIE 2.0 ofc. Quote Link to comment Share on other sites More sharing options...
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