i5 5675C problem with BLCK
i5 5675C problem with BLCK
I was attempting to boost my RAM speed and aimed for its maximum BLCK setting. At various points, I adjusted settings such as 12 multiplier (core and cache), 130Mhz BLCK, 1.64V RAM at 800Mhz base, 1,350V core, and 0.78 VTTDRAM (a guide suggested keeping it at 0.78 since the stock was 0.75). I also used a 10 multiplier for the iGPU and disabled edram. The system would sometimes post but often reported errors during Memtest. Eventually, I lowered it to 125, which stopped posting, then tried 120, 110, 105, 104, and 103, with 102 showing no errors on Memtest. When I returned to 130, it posted occasionally but still had issues. VGA led on MB was active; I concluded the problem was likely with the iGPU, though the multiplier didn’t resolve the posting issue. What could be the solution? Thanks for your help.
Maybe because on Z97 adjusting BCLK alters everything, even things that are very sensitive to overclocking like PCI-E and SATA buses. Most people agree not to modify the BCLK on anything from Sandy Bridge onward—it’s likely to cause issues. As for why 130 POSTs succeed while 103 doesn’t, I’m not sure. It could be that a non-essential part stops working at 130, the BIOS skips it and starts, but at 103 it becomes unstable or out of spec, forcing the BIOS to try initializing it and getting unexpected results.
I was attempting to overclock my RAM to reach its maximum BLCK setting. At various stages:
12 multiplier (core and cache)
130Mhz BLCK
1.64V RAM @800Mhz base
1,350V core
0.78 VTTDRAM (a guide suggested increasing it and the MB would turn yellow if above 0.79, so I stuck at 0.78, which was the original value)
10 multiplier for iGPU
disabled edram
The system occasionally posts, but I encounter numerous errors during Memtest.
I lowered it to:
125: no posting
120: no posting
110: no posting
105: no posting
104: no posting
103: no posting
102: posts, no errors in Memtest
Returning to 130: posts sometimes, errors reappear.
VGA LED on MB was on; I concluded the issue was likely with the iGPU, though the multiplier didn’t resolve the problem.
What’s happening? Any suggestions? Thank you for your help.
I was attempting to overclock my RAM to reach its maximum BLCK setting. At various speeds I tested, the system behaved differently. At 12 multiplier (core and cache), 130Mhz BLCK, 1.64V RAM at 800Mhz base, 1,350V core, and 0.78 VTTDRAM (a guide suggested increasing it to trigger a yellow indicator if above 0.79, so I stuck at 0.78). I also used a 10 multiplier for the iGPU and disabled edram. The system would sometimes post, but often I encountered errors during Memtest. Eventually, I lowered it to 125, which stopped posting, and then 120, 110, 105, 104, and finally 103, where no posting occurred. According to my observations, the issue seems linked to the iGPU, but the multiplier didn’t seem to resolve it. What’s happening? Any suggestions would be appreciated. Thank you for your help.
Maybe because on Z97 adjusting BCLK alters everything, even things that are very sensitive to overclocking like PCI-E and SATA buses. Most people agree not to modify the BCLK on anything from Sandy Bridge or later—it’s likely to cause issues. As for why 130 POSTs succeed while 103 doesn’t, I’m not sure. It could be that a non-essential part stops working at 130, the BIOS skips it and starts, but at 103 it becomes unstable or out of spec, forcing the BIOS to try initializing it and getting unexpected results.
It might be because on Z97 adjusting BCLK affects everything, especially components with tight overclocking limits like PCI-E and SATA buses. Most people agree not to modify BCLK on Sandy Bridge or newer systems—it’s likely to cause issues. As for why 130 POSTs succeed while 103 doesn’t, I’m not sure. It could be that a non-essential part fails at 130, the BIOS skips it and starts up, but at 103 it becomes unstable or out of spec, forcing the BIOS to try initializing it and receiving errors. Thanks for the advice.