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BCLK 100 , 195 or 200 whats the deal

MatsGlobetrotte
Level 10
Hi,

I have been tweaking around on the 4770k on my Maximus VI formula on the standard settings of 100 Mhz BCLK and the standard multipliers for the cores. That works fine and I get up to a decent speed 4600 - 4800 Mhz. I have also been able to tweak the BCLK from 100 up to 102Mhz and can with each .1 step see increases for example in Superpi and other benchmarks.

Today I swapped over to the ASUS configured BCLK 190 and 195 Profiles. I needed to adjust the voltages upwards to the same I have used for CPU and Ram to get it stable while manually turning down the clockspeed for the 4600 internal GPU.

Overall I can see processor speeds of


4485.31 MHz (23 * 195.01 MHz)

I tested in Superpi again and get very similar results with the overall CPU clockspeed being the same. I cant really see any benefit from having such high BCLK yet 2 MHz difference on the 100 MHz BCLK would give a big change in the overall performance. I would thus have assumed this was a way to make the overall system more.. efficient.

So then the question is.. Why would I need it. Were would I see the difference? I have a laptop that run at 266 BCLK for example. I ran XTU to check for example and that was just depressing 😉 600 some points at 4500 Mhz. pfft I can do that at what 3500 Mhz on a BCLK of a 100? or does various components just read out the 200 and divide its own speed to equivalent of the 100 Mhz setting?

What application-benchmark would potentially give something positive out of it. I mean CPU-Z validation for a MB clockspeed aint exactly a good motivator 🙂

Regards,


It started with a VIC-20... and now it is. Maximus Formula VI Intel 4770K 4.6GHz ASUS GTX780Ti 3GB Corsair Platinum Dominator 16GB 2400MHz Raid Express 240GB Samsung EVO 512 GB SSD Corsair 900D EK watercooling Corsair RM1000 ASUS PB278Q



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5 REPLIES 5

HiVizMan
Level 40
Memory speed.
To help us help you - please provide as much information about your system and the problem as possible.

MatsGlobetrotte
Level 10
🙂 Thanks Hiviz.

Hmm Memory speed as in? I have the Dominator platinum 2400 running at 2600Mhz XMP on the 100 BCLK and tweaked timings. But with the 195 BCLK I have to slow them down to even boot.

Size
16384 MB

Type
DDR3-1560 - Dual Channel

Frequency
780.1 MHz (1:3)

Timings
11-13-13-35

Slot #1 Module
Corsair - 8192 MB (10700)

Slot #2 Module
Corsair - 8192 MB (10700)
It started with a VIC-20... and now it is. Maximus Formula VI Intel 4770K 4.6GHz ASUS GTX780Ti 3GB Corsair Platinum Dominator 16GB 2400MHz Raid Express 240GB Samsung EVO 512 GB SSD Corsair 900D EK watercooling Corsair RM1000 ASUS PB278Q



jab383
Level 13
With different BCLK, different choices show up for memory speed. For example, with Bclk at 125 and the 125 Bclk strap set, DDR3-2500 shows up as an option using the dividers for 2000, but 25% higher base. My 2400s squeaked out a 2507 benchmark, but that came from stepping Bclk up over 104. I'm going to try to boot with 2500 using 125 Bclk as soon as I get around to it.

Jeff

upYours101
Level 7
If you increase Bclk, you also increase memory speed which will give you other memory speed options.

HiVizMan
Level 40
Sorry for the very short answer.

Lets say I want to overclock my memory above 3000Mhz, and even higher I want to shoot for 4000MHz. To do that I am going to need the strap to get the ram frequency that high.

For day to day use, no reason to use it at all. Hope that clears it up for you.
To help us help you - please provide as much information about your system and the problem as possible.