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System Name | Simon |
---|---|
Processor | Core i7 5820K @ 4.4GHz @1.25v core, 1.9v input, 1.12v system agent, 0.9v cache - 24/7 & P95 stable |
Motherboard | ASUS X99 Deluxe U3.1, BIOS 3101 |
Cooling | Corsair H110i GTX + 2 x Corsair ML140 Pro Red LED, exhaust @ top panel |
Memory | Corsair Vengeance LPX 4x 8GB 2666 MHz 16, 18, 18, 35, 2T (Stock) |
Video Card(s) | MSI GTX 1080 Gaming X (OC BIOS), +60 MHz GPU, +450 MHz Memory |
Storage | Samsung 960 Evo 500 Gb, WD Green + White Label, total 17 TB |
Display(s) | 3x Samsung CFG73 (24" 1920x1080, 144Hz) in 2D Surround, LG C7 OLED TV (55", 4K, 60Hz) |
Case | Corsair 760T + Corsair SP120 Perf.Ed. + 3x ML 140 Pro Red + DEMCI Dust Filter Kit + DeepCool RGB LED |
Audio Device(s) | Creative SB Z, Topping E30 + SMSL SP200, Hifiman 4XX, beyerdynamic 770 250Ω, Audeze iSine 10, HD6xx |
Power Supply | Corsair RM1000i + APC BackUPS RS1500 (modded w/ 130 AH Kung Long Batteries) + APC Smart UPS SUA1500i |
Mouse | Razer Naga Chroma + Reflex Lab Extended Mouse Pad + Xbox One S Controller + 3 x Xbox 360 Controllers |
Keyboard | Corsiar K70 RGB (2016 Edition) Cherry Mx Red w/ custom Arabic-legend shine-through keycaps |
Software | Windows 10 Pro x64 - ver. 20H2 |
Benchmark Scores | Onkyo TX-NR626 AV Receiver, speakers: 4x Yamaha NS-M325 + Yamaha NS-C3290 + Proson Libre Sub 8.1 |
Hello everyone. This is my first time with a Haswell-E CPU and I am almost done overclocking my 5820K. I thought I share my personal experience and settings so others may give me feedback and perhaps benefit from my steps and mistakes (if any), as there is lack of overclocking guides that suit my goal, that is to achieve a stable 4Ghz OC for 24/7 operation with as minimal increase in voltages as possible, to maximize the life span of the CPU while maintaining quiet operation and decent performance.
First of all my specs:
Intel Core i7 5820K
Asus X99 Deluxe U3.1 (BIOS 3004)
Corsair LPX 2666 mhz C16 4x8Gb
Corsair H110i GTX
Corsair Graphite 760T
Corsair RM 1000i
To keep the AIO CPU water cooler running quietly I connected the stock fans to the CPU block, the way Corsair recommends, and used the Corsair Link software to keep the fans at ~800 rpm most of the time by setting a custom fan profile, I also set the pump to quiet mode. (P.S I mounted the CPU cooler at the top panel and set its 2 fans as exhaust as I believe it achieves the best overall cooling of the case and the hardware inside it.)
I did not use the RAM's XMP profile as it sets the CPU strap and Bclock to 125 which I do not like. Instead I dialed in the nominal clock and timings (2666, 16, 18, 18, 36) and left the voltage to auto as it was correct (1.2v).
Using CPU-Z I found that the actual Bclock was 99.9 if set to auto or 100 in the bios so I changed it to 100.1 to have nice rounded clock numbers on the CPU and RAM. I left speed step technology and turbo mode enabled in bios, I also changed the minimum CPU power state setting in windows to 1% to ensure the CPU clocks down in idle. I changed the maximum CPU multiplier to 40 in bios and the Core voltage to adaptive mode (+0.001 as it is the minimum) and set the turbo boost voltage to 1.000, as I read in another thread @cadaveca recommends this when the Bclock is not overclocked, which makes sense. I left the cache and CPU input voltages to auto as I did not OC the cache, I disabled LLC (by setting it to level 1) to ensure minimal input voltage spikes that may shorten the life span of the CPU. I also set system agent voltage offset to (+0.001) to ensure the mobo does not increase the voltage if left auto.
Using ASUS AI suite and CPU-Z the voltages are:
CPU Core 0.769 v (Idle, multiplier x12) - 1.037 (Load, multiplier x40)
Cache 0.983 v
System agent 0.816 v
CPU Input 1.760 v
I used LinX, ASUS Realbench and prime95 (latest versions) to test for stability and temperatures. I read a lot of forums and guides (including ASUS's official ROG guide) recommending against using the new prime95 as it can harm the CPU when highly overclocked but I used it anyway as I found it was the fastest test to detect instabilities and the one which produced the highest temps, besides my OC and voltages are far from high or extreme, so it should be safe. Maximum temps with prime95 were 67 on the cores, 72 on CPU package and 70 on VRM, which I believe to be good considering how quiet the case is. Other stress tests did not come near these temps. At idle the temps are 35, 38, 40 respectively.
In spite of all my efforts, the CPU clock goes up and down even when sitting in windows doing nothing but browsing and it never stays at the x12 multiplier for more than few seconds. I think this is normal behavior but I wish I can change this.
So what do you think? Did I achieve my goal? Should I change anything? Spend more time fine-tuning things? Can any of the voltages be lowered further without affecting the stability? What would you do differently?
First of all my specs:
Intel Core i7 5820K
Asus X99 Deluxe U3.1 (BIOS 3004)
Corsair LPX 2666 mhz C16 4x8Gb
Corsair H110i GTX
Corsair Graphite 760T
Corsair RM 1000i
To keep the AIO CPU water cooler running quietly I connected the stock fans to the CPU block, the way Corsair recommends, and used the Corsair Link software to keep the fans at ~800 rpm most of the time by setting a custom fan profile, I also set the pump to quiet mode. (P.S I mounted the CPU cooler at the top panel and set its 2 fans as exhaust as I believe it achieves the best overall cooling of the case and the hardware inside it.)
I did not use the RAM's XMP profile as it sets the CPU strap and Bclock to 125 which I do not like. Instead I dialed in the nominal clock and timings (2666, 16, 18, 18, 36) and left the voltage to auto as it was correct (1.2v).
Using CPU-Z I found that the actual Bclock was 99.9 if set to auto or 100 in the bios so I changed it to 100.1 to have nice rounded clock numbers on the CPU and RAM. I left speed step technology and turbo mode enabled in bios, I also changed the minimum CPU power state setting in windows to 1% to ensure the CPU clocks down in idle. I changed the maximum CPU multiplier to 40 in bios and the Core voltage to adaptive mode (+0.001 as it is the minimum) and set the turbo boost voltage to 1.000, as I read in another thread @cadaveca recommends this when the Bclock is not overclocked, which makes sense. I left the cache and CPU input voltages to auto as I did not OC the cache, I disabled LLC (by setting it to level 1) to ensure minimal input voltage spikes that may shorten the life span of the CPU. I also set system agent voltage offset to (+0.001) to ensure the mobo does not increase the voltage if left auto.
Using ASUS AI suite and CPU-Z the voltages are:
CPU Core 0.769 v (Idle, multiplier x12) - 1.037 (Load, multiplier x40)
Cache 0.983 v
System agent 0.816 v
CPU Input 1.760 v
I used LinX, ASUS Realbench and prime95 (latest versions) to test for stability and temperatures. I read a lot of forums and guides (including ASUS's official ROG guide) recommending against using the new prime95 as it can harm the CPU when highly overclocked but I used it anyway as I found it was the fastest test to detect instabilities and the one which produced the highest temps, besides my OC and voltages are far from high or extreme, so it should be safe. Maximum temps with prime95 were 67 on the cores, 72 on CPU package and 70 on VRM, which I believe to be good considering how quiet the case is. Other stress tests did not come near these temps. At idle the temps are 35, 38, 40 respectively.
In spite of all my efforts, the CPU clock goes up and down even when sitting in windows doing nothing but browsing and it never stays at the x12 multiplier for more than few seconds. I think this is normal behavior but I wish I can change this.
So what do you think? Did I achieve my goal? Should I change anything? Spend more time fine-tuning things? Can any of the voltages be lowered further without affecting the stability? What would you do differently?
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