Should I run my mem @ 1066 or 800 unganged?

kenkickr · Jul 23, 2008, 12:52 PM

I'm not sure if this has been posted but I'll ask anyways. The ram I have is stock @ 800 4-4-4-12 but currently can run fine @ 1066 5-5-5-15. Does unganged benefit any from the 1066 or will I just not see a difference between the two do to the tighter mem settings @ 800 compared to the 1066 settings?

Ketxxx · Jul 23, 2008, 12:54 PM

1066 should offer you a nice bandwidth improvement which will lead to better performance in most things. Download Everest and try 800 and 1066, good quick way to see whats going on.

kenkickr · Jul 23, 2008, 01:08 PM

I will try Everest and will report back with my findings. Thanks

alexp999 · Jul 23, 2008, 01:14 PM

Quote:

Originally Posted by kenkickr

I will try Everest and will report back with my findings. Thanks

I'd be insterested in your findings too, I'm looking at upgrading from 800 4-4-4-12 to 1066 5-5-5-15 ram.

tigger · Jul 23, 2008, 01:28 PM

I usually buy 1066 ram now so i have a bit more headroom for ocing.I had the previous tracers at 1125 but i am a bit scared to push these

Ketxxx · Jul 23, 2008, 01:57 PM

Wimp

tigger · Jul 23, 2008, 02:46 PM

Lol,it may have been the incompatibility(phew long word) with the p5k-prem that really killed the others,well 1 stick.I might have a bash later,at least see if these will reach 1125.

Squirrely · Jul 23, 2008, 07:15 PM

Well, on a more technical aspect, there is a .6 ns delay difference between 800, and 1066.

(This is all from my memory from a while ago, lol, so someone correct me if I'm wrong)

To calculate out the base latency (this is cas latency only) it takes for a command to be processed, you do t = 1 / (f/2). So for 800, you would do 1/400, which is 2.5ns. Now with 1066 its 1/533, which is 1.88ns. But it has a higher cas latency of 5 vs 4.

So:

2.5 * 4 = 10ns delay
1.88 * 5 = 9.4 ns delay.

Thus, running the ram at 1066 mhz, and having a cas latency of 5, it is .6 ns faster than 800 mhz at 4 cas latency.

If it is stable, then why not keep it at the faster speed. But, in the real world, the .6 ns delay, will not matter much, unless you are benching your ram.

Ketxxx · Jul 23, 2008, 10:55 PM

latency isnt everything. Available system bandwidth plays a big role when it comes to things like level loading times.

Jul 23, 2008, 12:52 PM	#1
kenkickr Join Date: Dec 2007 Location: Springfield, IL Posts: 4,490 (2.25/day) Thanks: 1,024 Thanked 1,328 Times in 1,094 Posts System Specs	Should I run my mem @ 1066 or 800 unganged? I'm not sure if this has been posted but I'll ask anyways. The ram I have is stock @ 800 4-4-4-12 but currently can run fine @ 1066 5-5-5-15. Does unganged benefit any from the 1066 or will I just not see a difference between the two do to the tighter mem settings @ 800 compared to the 1066 settings?

System Name:	Wrigley II/ HTPC
Processor:	I7 X3820@ 4.7Ghz v1.39/ i3 2120 stock
Motherboard:	MSI X79 Big Bang (2.1 bios)/ Biostar H61GMC
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Memory:	4 x Samsung DDR3 1600 @ 2000 Cas10 / 4Gb kit OCZ DDR3 1600
Video Card:	7950 OTW + GTX 465(physx) / MSI 6570 2Gb
Hard Disk:	Corsair Force 3 128gb SSD, 2x 500gb Momentus XT Raid 0, 2TB Seagate , and 2TB WD Green / 500gb Seaga
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Jul 23, 2008, 12:54 PM	#2
Ketxxx Eligible for custom title Join Date: Mar 2006 Location: Kingdom of gods Posts: 6,380 (2.42/day) Thanks: 35 Thanked 580 Times in 412 Posts System Specs	1066 should offer you a nice bandwidth improvement which will lead to better performance in most things. Download Everest and try 800 and 1066, good quick way to see whats going on. __________________ WARNING: I am cracking down on stupidity in the forums. Anyone caught making a dumb statement clearly not knowing many, if any of the facts, will promptly be directed to xtremesystems. Sig edited. If anyone wants to know about the E4400 (E7200 sold) drop me a PM

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Video Card:	2x XFX HD4830 512MB
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Sound Card:	Asus Xonar DX 7.1 PCI-E
PSU:	Hi-Power 800W Modular. 3.3 & 5v rails 30A, 4x 12v rails @ 20A each.
Software:	Windows 7 x64

System Name:	Wrigley II/ HTPC
Processor:	I7 X3820@ 4.7Ghz v1.39/ i3 2120 stock
Motherboard:	MSI X79 Big Bang (2.1 bios)/ Biostar H61GMC
Cooling:	H2O / Air
Memory:	4 x Samsung DDR3 1600 @ 2000 Cas10 / 4Gb kit OCZ DDR3 1600
Video Card:	7950 OTW + GTX 465(physx) / MSI 6570 2Gb
Hard Disk:	Corsair Force 3 128gb SSD, 2x 500gb Momentus XT Raid 0, 2TB Seagate , and 2TB WD Green / 500gb Seaga
Optical Drive:	Pioneer DVD burner / Lite On Blu Ray Combo drive
CRT/LCD Model:	3x Hanns-G 27" Eyefinity baby!! / 42" Plasma Samsung
Case:	Rosewill Blackhawk Ultra / Antec Minuet
Sound Card:	X-fi Titanium HD w/ PAX drivers / AMD HDMI
PSU:	Cougar 1000W / Antec 300W
Software:	Windows 8 Pro, Windows 7 Ult(Hyper-V) and Ubuntu Server(Hyper-V) / Windows 8 Pro w/ MCE

Jul 23, 2008, 01:08 PM	#3
kenkickr Join Date: Dec 2007 Location: Springfield, IL Posts: 4,490 (2.25/day) Thanks: 1,024 Thanked 1,328 Times in 1,094 Posts System Specs	I will try Everest and will report back with my findings. Thanks

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Jul 23, 2008, 01:28 PM	#5
tigger I'm the only one Join Date: Mar 2006 Location: HU5 1LL Posts: 7,189 (2.75/day) Thanks: 469 Thanked 940 Times in 773 Posts System Specs	I usually buy 1066 ram now so i have a bit more headroom for ocing.I had the previous tracers at 1125 but i am a bit scared to push these __________________ http://img.techpowerup.org/110324/v6351cpuzvalj197.jpg ]Monster E6300 oc http://www.techpowerup.com/gallery/2163.html

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Jul 23, 2008, 01:57 PM	#6
Ketxxx Eligible for custom title Join Date: Mar 2006 Location: Kingdom of gods Posts: 6,380 (2.42/day) Thanks: 35 Thanked 580 Times in 412 Posts System Specs	Wimp __________________ WARNING: I am cracking down on stupidity in the forums. Anyone caught making a dumb statement clearly not knowing many, if any of the facts, will promptly be directed to xtremesystems. Sig edited. If anyone wants to know about the E4400 (E7200 sold) drop me a PM

Jul 23, 2008, 02:46 PM	#7
tigger I'm the only one Join Date: Mar 2006 Location: HU5 1LL Posts: 7,189 (2.75/day) Thanks: 469 Thanked 940 Times in 773 Posts System Specs	Lol,it may have been the incompatibility(phew long word) with the p5k-prem that really killed the others,well 1 stick.I might have a bash later,at least see if these will reach 1125. __________________ http://img.techpowerup.org/110324/v6351cpuzvalj197.jpg ]Monster E6300 oc http://www.techpowerup.com/gallery/2163.html

Jul 23, 2008, 07:15 PM	#8
Squirrely Join Date: Mar 2008 Posts: 358 (0.19/day) Thanks: 38 Thanked 40 Times in 34 Posts System Specs	Well, on a more technical aspect, there is a .6 ns delay difference between 800, and 1066. (This is all from my memory from a while ago, lol, so someone correct me if I'm wrong) To calculate out the base latency (this is cas latency only) it takes for a command to be processed, you do t = 1 / (f/2). So for 800, you would do 1/400, which is 2.5ns. Now with 1066 its 1/533, which is 1.88ns. But it has a higher cas latency of 5 vs 4. So: 2.5 * 4 = 10ns delay 1.88 * 5 = 9.4 ns delay. Thus, running the ram at 1066 mhz, and having a cas latency of 5, it is .6 ns faster than 800 mhz at 4 cas latency. If it is stable, then why not keep it at the faster speed. But, in the real world, the .6 ns delay, will not matter much, unless you are benching your ram. __________________

Processor:	Intel E8400 @ 3.6ghz (1.25v)
Motherboard:	Evga 680i SLI
Cooling:	ASUS Arctic Square
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Jul 23, 2008, 10:55 PM	#9
Ketxxx Eligible for custom title Join Date: Mar 2006 Location: Kingdom of gods Posts: 6,380 (2.42/day) Thanks: 35 Thanked 580 Times in 412 Posts System Specs	latency isnt everything. Available system bandwidth plays a big role when it comes to things like level loading times. __________________ WARNING: I am cracking down on stupidity in the forums. Anyone caught making a dumb statement clearly not knowing many, if any of the facts, will promptly be directed to xtremesystems. Sig edited. If anyone wants to know about the E4400 (E7200 sold) drop me a PM

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