Minimum multiplier

petteyg359 · 12-21-09, 12:22 AM

Why is the minimum multiplier on any LGA775 CPU higher than FSB? I could understand not allowing multiplier on my Q9450 to be lower than 4x (4 x 333 = 1333 = FSB), but why stop at 6x multiplier?

Bobnova · 12-21-09, 10:31 AM

I would imagine that it is a latencies issue, often times you get just as much instability going slow as you do going fast. Below a certain spot the CPUs frequency multiplier bits probably don't work.

thideras · 12-21-09, 10:35 AM

My guess is the power and heat reduction isn't worth the performance loss. You could technically run it at 1x, but you'd have to greatly reduce the voltage and I'm sure you'd hit other issues.

12-21-09, 12:22 AM	Thread Starter #1
petteyg359 Join Date: Jul 2004 Location: University of Southern Mississippi	Minimum multiplier Why is the minimum multiplier on any LGA775 CPU higher than FSB? I could understand not allowing multiplier on my Q9450 to be lower than 4x (4 x 333 = 1333 = FSB), but why stop at 6x multiplier? __________________ MSI 890GXM-G65 - FX 8350 - 16GiB 12800 - 7950 3GiB - 8 Pro x64 / Gentoo amd64 - AX760 Dell XPS 15 L502x - i7 2760QM - 16GiB 12800 - GT 540M 2GiB - 7 Pro x64 / Gentoo amd64 - Agility 4 512GB [GB ≠ GiB] [MB ≠ MiB] [kB ≠ kiB] [1000 ≠ 1024] [Giga ≠ gram] [Mega ≠ milli] [Kelvin ≠ kilo] [Byte ≠ bit] "Apparently, Plaintiff believes that he could sue an egg company for fraud for labeling a carton of 12 eggs a “dozen,” because some bakers would view a “dozen” as including 13 items." - Western Digital 2006
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12-21-09, 10:31 AM	#2
Bobnova Air Superiority Senior Member Benching Team Leader Join Date: May 2009 Location: Humboldt	I would imagine that it is a latencies issue, often times you get just as much instability going slow as you do going fast. Below a certain spot the CPUs frequency multiplier bits probably don't work. __________________ "Two things are infinite: the universe and human stupidity; and I'm not sure about the the universe." -- Einstein (maybe) How to check your PSU with a multimeter. 17bXw5t51rEBXGavJFMJsC8g7HQgThUGc7 Heatware.
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12-21-09, 10:35 AM	#3
thideras Banned Neckbeard Moderator Premium Member #3 Join Date: May 2006 Location: South Dakota	My guess is the power and heat reduction isn't worth the performance loss. You could technically run it at 1x, but you'd have to greatly reduce the voltage and I'm sure you'd hit other issues. __________________ Desktop: Gigabyte Z77X-UD5H \| 3570k 4.6 GHz \| 32 GB GSkill Ares \| GTX 570 \| 180 GB Intel & 2 TB total \| Arch Linux and Windows 7 Main server: 30 TB raw disk \| 2x Opteron 6134 \| Asus KGPE-D16 \| 128 GB RAM \| IBM M1015 \| CentOS 6.2 VM Server: Dell R710 \| 2x E5645 \| 288 GB RAM \| 8x 300 GB Velociraptor \| Xen Cloud Platform (XCP) "That's not overkill, or a lot. That's just thiderastic." -txus.palacios Current projects: Rackmount Overkill (New) \| 30/45 hard drive server Articles: Rack Mounting 101 \| Dell Perc 5/i Throughput Benchmarks Past projects: Software RAID \| The Dragon Case My Website *Want to talk directly to all* the moderators at once? Call the Mod Hotline!**
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