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Latency and timing question

post #1 of 6
Thread Starter 
I've got (2x2gb) DDR3 1600 8-8-8-24 @ 1.65v

and it's been slow as hell, so I checked the clocking and it showed it running at 400Mhz. In AMD overdrive the highest option was to put it at 800Mhz. Thus I went into my bios to manually but the settings options were

Auto
928
1237
1547
1856

My Cas Latency's are set at 6-6-6-18 and voltage set at 1.5

So my question is. Should I set change the latency's and voltage to what it says on the chip, if so should I do it BIOS or AMD Overdrive?

And what's with the timing? Should I put it on 800Mhz in overdrive or pick one of the odd settings from the bios?
post #2 of 6
Those odd values are due to your FSB OC. FSB is directly related to RAM frequency multiplier.
For what i understand in your post, your ram is working at a speed of 800MHZ 6-6-6-18, so i would choose the 1547 value in BIOS and set the timings to spec, voltage to.
If you want you can tinker a little the timings, trying to get them as low as you can, maybe 7-8-7-24. You may need a voltage bump to this though.

Also, command rate must be 2T at 1600MHz, try to set it at 1T and see if its stable. It improves bandwith.

Increasing the CPU-NB frequency to 2400-2600MHz or higher will help you to achieve stability on X6 chips too
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post #3 of 6
Thread Starter 
It crashed on me, here's how

In Bios:
I changed the timing value to Auto
The latency's to 8-8-8-24
voltage to 1.65v


In Overdrive:
I changed the timing to 800Mhz (does that mean 800 per stick equalling 1600 totall?)

When rebooting I got blue screen like 4 times.

So I changed the bios back to 947, and 6-6-6-18, 1.5v

That allowed me to boot up right back to normal.

Soooo what the hell happened?

Also are you saying that the lower the Lat number the better? and I didn't understand what you were saying about 1T/2T.
post #4 of 6
Thread Starter 
One Last thing, since it never got a proper reboot OverDrive never changed the timing so it's still showing 400Mhz (which I assume to mean 800 total)
post #5 of 6
Not 800MHz per stick, but 800MHz clock speed. DDR stands for double-data RAM, so you multiply it for 2 to have the total RAM speed.

Yes, latencies, the lower the better. Speed -> the higher the better

It should work at close to spec speeds and timings... You sure they are both 1600MHz CL8 sticks?
Try a little voltage bump. Little like 1.68-1.7V
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Phenom II X6 1090T Foxconn A79A-S PNY GTS450 XLR8 KVR800D2N6/2G 
Hard DriveHard DriveHard DriveHard Drive
WD2500AAKS WD3200AAKS WD10EARS WD3200JB 
Optical DriveOptical DriveCoolingOS
Asus DRW-1608P2 Asus DRW-1608P2 Corsair H70 Ubuntu Server 10.10 x64 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 ASUS VW193S Logitech EX100 LC-Power 650W 
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I need upgrades
(21 items)
 
  
CPUMotherboardGraphicsRAM
Phenom II X6 1090T Foxconn A79A-S PNY GTS450 XLR8 KVR800D2N6/2G 
Hard DriveHard DriveHard DriveHard Drive
WD2500AAKS WD3200AAKS WD10EARS WD3200JB 
Optical DriveOptical DriveCoolingOS
Asus DRW-1608P2 Asus DRW-1608P2 Corsair H70 Ubuntu Server 10.10 x64 
OSMonitorKeyboardPower
Windows 7 Professional x64 SP1 ASUS VW193S Logitech EX100 LC-Power 650W 
CaseMouseAudioAudio
Coolermaster Stacker 830 SE Logitech EX100 Creative Audigy 2 ZS Creative i-Trigue L3450 
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post #6 of 6
Try to get your bus clock to 240 (x6.66 = 1600Mhz RAM) or 300 (x5.33 = 1600Mhz RAM) megahertz.
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