Regards from Greece, I am Kiriakos.
I own my ASUS P5QC for about ten years.
My PC serves mainly productivity and a bit of gaming.
This December I did a major upgrade by adding an SSD drive as game storage and I also got G.SKILL F3-10600CL9D-8GBNT as upgrade to 8GB of ram.
Previously I was using KHX1600C8D3T1K2 4GX (4GB KIT without any problems at all)
I am using and setup computers in the past 25 years.
Additionally I am fully aware of ASUS P5QC technical requirements about the use of DDR3, which is the use of low density DDR3 along with the limit as maximum of 4GB per slot.
Prior writing this topic I did extensive read of older posts, and therefore I have only fresh information’s to share and or them be investigated.
My G.SKILL F3-10600CL9D-8GBNT (2x4GB Kit) this is production of 20 November 2020, and works well with my current CPU Q6600 at Strap-266MHz at lowest latency set by SPD.
Now I have ordered a Q9650 (CPU native Strap-333MHz), this will force the ram to run at named DDR3 1333 rated FSB.
I thought to pretest F3-10600CL9D-8GBNT at 1333 rated FSB prior switching to latest CPU (Q9650 still on shipping).
Over the years many people reported boot issues with P5QC and even G.SKILL low density DDR3, and for this reason I did extended testing too so to find the why?
At my test I did force Strap 333 along FSB at 333 instead of 266 (this will temporarily OC the CPU at 3GHz), then I did manually set F3-10600CL9D-8GBNT timings according to SPD and boot failed.
After investigation I did discover that at BIOS - DDR3: 1-st information, that CAS# latency 9 & 10 values these cause failure to boot and only by setting CAS to 11 this it does work.
BIOS - DDR3 1-st information this has 8 parameters, my working set this is now:
11-9-9-24-4-110-10-6
My find is that with specific G-SKILL KIT, only first parameter of eight this is significant and causes boot to fail.
Currently working first parameter at my P5QC this is CAS latencies’ of 7 or 8 or 11.
Other seven parameters are less significant regarding boot failure.
For example at sixth parameter the SPD mention 107 and BIOS does not have exact manual value and therefore I did use the closer larger one that is 110.
In summary:
ASUS P5QC – BIOS 2103 - CPU Q6600 – Strap 333 – Memory Voltage 1.56V along latest made F3-10600CL9D-8GBNT, this FAIL to boot at manual setting of CAS# 9 and 10 values at rated FSB 1333.
And it works exclusively at CAS# 7, 8 and 11.
At CAS 11 the system is rock stable (six hours of gaming at BF5), CPU Q6600 this is tested part and can be OCed up to 3.5GHz, but Overclocking this is not currently in my primary focus.
Current working set at 1333 Rated FSB 11-9-9-24-4-110-10-6
Such DDR3 RAM KIT behavior this is not acceptable, but this is not my final verdict, because I have not tested yet the Q9650 with Auto timing settings so to see with my eyes of what will happen?
I own my ASUS P5QC for about ten years.
My PC serves mainly productivity and a bit of gaming.
This December I did a major upgrade by adding an SSD drive as game storage and I also got G.SKILL F3-10600CL9D-8GBNT as upgrade to 8GB of ram.
Previously I was using KHX1600C8D3T1K2 4GX (4GB KIT without any problems at all)
I am using and setup computers in the past 25 years.
Additionally I am fully aware of ASUS P5QC technical requirements about the use of DDR3, which is the use of low density DDR3 along with the limit as maximum of 4GB per slot.
Prior writing this topic I did extensive read of older posts, and therefore I have only fresh information’s to share and or them be investigated.
My G.SKILL F3-10600CL9D-8GBNT (2x4GB Kit) this is production of 20 November 2020, and works well with my current CPU Q6600 at Strap-266MHz at lowest latency set by SPD.
Now I have ordered a Q9650 (CPU native Strap-333MHz), this will force the ram to run at named DDR3 1333 rated FSB.
I thought to pretest F3-10600CL9D-8GBNT at 1333 rated FSB prior switching to latest CPU (Q9650 still on shipping).
Over the years many people reported boot issues with P5QC and even G.SKILL low density DDR3, and for this reason I did extended testing too so to find the why?
At my test I did force Strap 333 along FSB at 333 instead of 266 (this will temporarily OC the CPU at 3GHz), then I did manually set F3-10600CL9D-8GBNT timings according to SPD and boot failed.
After investigation I did discover that at BIOS - DDR3: 1-st information, that CAS# latency 9 & 10 values these cause failure to boot and only by setting CAS to 11 this it does work.
BIOS - DDR3 1-st information this has 8 parameters, my working set this is now:
11-9-9-24-4-110-10-6
My find is that with specific G-SKILL KIT, only first parameter of eight this is significant and causes boot to fail.
Currently working first parameter at my P5QC this is CAS latencies’ of 7 or 8 or 11.
Other seven parameters are less significant regarding boot failure.
For example at sixth parameter the SPD mention 107 and BIOS does not have exact manual value and therefore I did use the closer larger one that is 110.
In summary:
ASUS P5QC – BIOS 2103 - CPU Q6600 – Strap 333 – Memory Voltage 1.56V along latest made F3-10600CL9D-8GBNT, this FAIL to boot at manual setting of CAS# 9 and 10 values at rated FSB 1333.
And it works exclusively at CAS# 7, 8 and 11.
At CAS 11 the system is rock stable (six hours of gaming at BF5), CPU Q6600 this is tested part and can be OCed up to 3.5GHz, but Overclocking this is not currently in my primary focus.
Current working set at 1333 Rated FSB 11-9-9-24-4-110-10-6
Such DDR3 RAM KIT behavior this is not acceptable, but this is not my final verdict, because I have not tested yet the Q9650 with Auto timing settings so to see with my eyes of what will happen?
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