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Overclocking and RAMDisks

post #1 of 6
Thread Starter 
I've decided to throw my hand into the ever-so-delightful art of memory overclocking. Naturally, I have no idea what I'm doing, so I'm just plugging in numbers and accidentally doing something right. To my understanding, it's just a battle between speed and timings to try finding a happy medium between them. Here's what I was able to do:

The kit: Mushkin 16 GB (4x4 GB) Silverline set
Stock settings: 1333mhz, 9-9-9-24
1st overclock: 1600mhz, 9-9-9-24
Final clock: 1866mhz, 10-10-10-24

I found that I could push the frequency straight to 1600mhz without even touching the timings or voltage. Nice. However, it is to my understanding that FX CPUs (I have an FX 8350 @ 4.75GHz) tend to like higher memory frequencies. So I loosened the timings a bit to see if I could push that a bit higher. At 10-10-10, I got up to 1866 stable. Any speed higher than that would require loosening the timings again, so I'm not sure if it's worth it.

Anyway, I'm currently running a RAMDisk on this kit. At first, I ran it at 4 GB with the free version of AMD's DataRAM makeover. Yesterday, I caved and bought a license. The RAMDisk is now at 10 GB. Before though, when I was running at 1600 9-9-9, I ran a CDM benchmark on the disk. These are the results I got:



Pretty good. That blows my SSD out of the water, and we're not even going to try comparing it to a mechanical drive. Setting that aside, I ran another benchmark today with 1866 10-10-10 settings. Here's where it gets interesting:



As you can see, the sequential and 512K results got a major boost. They totally smoke the original results. The 4K results though? They went way down. Now obviously, this isn't a very consistent comparison. There are other variables that I altered, primarily the disk size (1st: 4 GB, 2nd : 10 GB). I also don't remember what the NB frequency was on that first test. It's 2600mhz now, and I'm pretty sure I didn't change that from before.

So my question is: now what? I'm having a hard time interpreting these results. Was it overall good that I bumped the memory speed in exchange for the timings? And as a RAMDisk, are the sequential and 512 results more important than the 4K results? I'm using it primarily as a scratch disk and installation point for various high-end software (primarily PhotoShop and Illustrator). Is there anything I can do improve the performance further?
post #2 of 6
Hi.
1. Read this (post # 6-7)
2. FX chips prefer bandwidth over tighter timings ( Higher speed=more bandwidth)
3. Having all slots populated, the clocks at 4.75GHz and the NB at 2600 leads me to believe that you have a golden chip. Anything past 2400 is pure luck on these chips, because the NB/RAM ratio on FX=2x base RAM speed.
Edited by Grmadness - 5/13/13 at 9:01pm
   
Frappenstein
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Frappenstein
(12 items)
 
CPUMotherboardGraphicsRAM
Phenom ii x4 965 BE GA-MA-790FXT-UD5P Sapphire R9 290 Tri-x OC Kingston Value RAM 
RAMHard DriveHard DriveOptical Drive
Kingston Value RAM Seagate Barracuda (Died) WD Caviar Black Sony DVD/RW 
Optical DriveCoolingOSMonitor
Sony DVD/RW Xigmatec Aegir SD128264 Win 7 Home Premium 64 bit LG 2443T 
PowerCase
ThermalTake Toughpower 800 (Non modular) ThermalTake Eureka 
CPUMotherboardGraphicsRAM
Pentium 4 1.7Ghz Northwood Gigabyte GA-8ITX Creative GeForce3 Ti 500 Some generic Samsung 512Mb 
Hard DriveOptical DriveCoolingOS
Hitachi 80 Gb Plextor CD-DVD RW  What was that again? Windows 98 SE  
MonitorKeyboardPowerCase
15'' CRT Broken Yes,it has. Fridge 
MouseMouse PadAudio
In the lab for exeriments  To disect the mouse Audigy 3 
CPUMotherboardGraphicsRAM
5930k ASUS Rampage V Extreme Sapphire R9 290 Ripjaws V 2400MHz  
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Intel 750 Series 400GB WD Caviar Black 1 Tb H-100i Win 7 64 bit Ultimate 
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post #3 of 6
Thread Starter 
1. I see. So, from what I understood from those posts, significantly higher seq/512K results are preferable despite lower 4K scores, right? Oh, and I ran the benchmark again after reducing the RAMdisk size down to 8 GB from 10. I forgot to screenshot it, but the results were about 200 MB/s higher on seq & 512K, and right around 250 on all of 4K. I don't really have an explanation for that. Perhaps it was happier with using less RAM?

2. That's good to know. My RAM isn't very high end, so I'm guessing I'll probably need to loosen the timings quite a bit to get it too much higher. I was able to get it to boot at around 1950 10-10-10, but every stability test I ran threw out errors left and right. Also, when I tested at 1866, I just set all three timings straight to 10 rather than bumping each one separately. I did try dropping just the CAS latency back to 9 with absolutely no success though. Should I try dropping the other times down a bit before continuing, or just use this as a baseline and start pushing a higher speed? Also, if I were to loosen the timings one-by-one this time, which one would be best to start with? Again, I'm treading in unfamiliar waters here.

3. Is that so? Do you have any further reading on this? This is the first I've heard of it, so I'd be interested to know more. I also remember that the HT link on my board was set to 3000mhz when I first started looking at it. I don't know if that was the result of my screwing around with other stuff or not, but I do remember it worked at that speed. I just read in another thread that keeping it synced with the NB frequency showed some performance gains, so I dropped it down to 2600. And since I apparently have a "golden chip," should I attempt pushing the NB frequency even more before tackling the memory again?
post #4 of 6
I'll go from end to beginning.
You can bump the NB to 2700, but I think that the IMC is at the limits. No harm in trying though. Just keep in mind to lower that CPU OC a bit to give some headroom to the NB. Read this.
Do a Clear CMOS, but keep notes on your current OC settings. Messing around with RAM timings can mess things quite a bit. Standard procedure is changing one value at a time and test. Bump the voltage a bit (up to 1.65v max is my suggestion). And I don't suggest that you loosen the timings much. AMD still likes tight timings. thumb.gif
Try by using a different benchmark to have a clearer view of your results. Atto, for example, or HDTune.
Edited by Grmadness - 5/13/13 at 10:28pm
   
Frappenstein
(12 items)
 
CPUMotherboardGraphicsRAM
Phenom ii x4 965 BE GA-MA-790FXT-UD5P Sapphire R9 290 Tri-x OC Kingston Value RAM 
RAMHard DriveHard DriveOptical Drive
Kingston Value RAM Seagate Barracuda (Died) WD Caviar Black Sony DVD/RW 
Optical DriveCoolingOSMonitor
Sony DVD/RW Xigmatec Aegir SD128264 Win 7 Home Premium 64 bit LG 2443T 
PowerCase
ThermalTake Toughpower 800 (Non modular) ThermalTake Eureka 
CPUMotherboardGraphicsRAM
Pentium 4 1.7Ghz Northwood Gigabyte GA-8ITX Creative GeForce3 Ti 500 Some generic Samsung 512Mb 
Hard DriveOptical DriveCoolingOS
Hitachi 80 Gb Plextor CD-DVD RW  What was that again? Windows 98 SE  
MonitorKeyboardPowerCase
15'' CRT Broken Yes,it has. Fridge 
MouseMouse PadAudio
In the lab for exeriments  To disect the mouse Audigy 3 
CPUMotherboardGraphicsRAM
5930k ASUS Rampage V Extreme Sapphire R9 290 Ripjaws V 2400MHz  
Hard DriveHard DriveCoolingOS
Intel 750 Series 400GB WD Caviar Black 1 Tb H-100i Win 7 64 bit Ultimate 
PowerCase
Super Flower 1600W Platinum Coolermaster Cosmos2 
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Frappenstein
(12 items)
 
CPUMotherboardGraphicsRAM
Phenom ii x4 965 BE GA-MA-790FXT-UD5P Sapphire R9 290 Tri-x OC Kingston Value RAM 
RAMHard DriveHard DriveOptical Drive
Kingston Value RAM Seagate Barracuda (Died) WD Caviar Black Sony DVD/RW 
Optical DriveCoolingOSMonitor
Sony DVD/RW Xigmatec Aegir SD128264 Win 7 Home Premium 64 bit LG 2443T 
PowerCase
ThermalTake Toughpower 800 (Non modular) ThermalTake Eureka 
CPUMotherboardGraphicsRAM
Pentium 4 1.7Ghz Northwood Gigabyte GA-8ITX Creative GeForce3 Ti 500 Some generic Samsung 512Mb 
Hard DriveOptical DriveCoolingOS
Hitachi 80 Gb Plextor CD-DVD RW  What was that again? Windows 98 SE  
MonitorKeyboardPowerCase
15'' CRT Broken Yes,it has. Fridge 
MouseMouse PadAudio
In the lab for exeriments  To disect the mouse Audigy 3 
CPUMotherboardGraphicsRAM
5930k ASUS Rampage V Extreme Sapphire R9 290 Ripjaws V 2400MHz  
Hard DriveHard DriveCoolingOS
Intel 750 Series 400GB WD Caviar Black 1 Tb H-100i Win 7 64 bit Ultimate 
PowerCase
Super Flower 1600W Platinum Coolermaster Cosmos2 
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post #5 of 6
Did you use a FAT32 disk originally (4GB) and switch to NTFS or exFAT for the 10GB disk? That would likely explain the dramatic shift in speeds from random to sequential...
   
Z77 Bench-a-lot
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Z77 Bench-a-lot
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EVGA GTX780Ti Classified K|ngp|n Edition @ 1483... 16GB G.Skill Ripjaws-Z @ DDR3-2248 9-10-9-26 1T Samsung 830 256GB SSD WD10EZEX 1TB HDD 
Hard DriveHard DriveHard DriveHard Drive
WD10EALX 1TB HDD Seagate Barracuda 7200.14 1TB WD3200AAKS 320GB HDD WD5000HHTZ 10krpm 500GB VelociRaptor 
Optical DriveCoolingCoolingCooling
LG/Hitachi Slim DVD-R/W Custom MB-Backside VRM-sinks (Copper) 3x NZXT RF-FX140LB 1-2krpm 98.3CFM Case Fans 2x Corsair SP120-PE Case Fans 
CoolingCoolingCoolingCooling
Heatkiller GTX680 "Hole Edition" Block + Backplate XSPC Single-Bay Res (Single 5.25 bay) EK Multioption Res X2 - Advanced 150 DD "Fill-Port Res" + Fill-Port Fitting (Red) 
CoolingCoolingCoolingCooling
2x MCP35X + Heatsinks/80x15mm Fan XSPC EX420 Alphacool NeXXos UT60 240 6x Bgears Blasters 140mm 1800rpm Fans 
CoolingCoolingCoolingOS
4x Koolance 120x25mm 2600rpm Fans Comp/Rotary Fittings (BP/XSPC/Monsoon) Primoflex Pro LRT - White (1/2x3/4) Windows 7 Professional 64bit  
MonitorMonitorMonitorMonitor
Dell P2210Hb 21.5" 1920x1080p Viewsonic VA2012WB 20.1" LCD 1680x1050 Dell U3014 Eizo 27" 1440p 10bit RGB-LED Backlit AH-IPS Panel 
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post #6 of 6
Thread Starter 
I used the same approach every time I created a new disk: start it unformatted, open disk manager, format as NTFS.

As for the increased overclock, I give up. I will not touch anything relating to any of that for a while. When I set the NB clock to 2700MHz, it worked and then failed. It loaded through enough of the BIOS to where it thought it was stable, but then it froze. Usually, if my settings don't work, it just won't boot. It'll then detect the failed boot next time I start it up and force me into the BIOS to fix it. This is the first time I actually had to reset the CMOS. And no, I did not remember exactly what settings I put in everywhere. That sucked. thumbsdownsmileyanim.gif

Fast-forward to now, and I'm back to my original settings (CPU @ 4.75, RAM @ 1866 10-10-10). I tried pushing to 2133, but no luck. I couldn't get it to boot with 1.575 volts @ 11-11-11. At that point, I just figured the speed boost wasn't worth it. I do think it was stable at the odd setting of 1950 10-11-10, but that just confused me since almost every piece of software that lists a speed (e.g. task manager, AMD system monitor, etc.) said it was 1866. I'm fairly certain that's just the software locking itself to common speeds since CPU-Z reported something that sounded about right (the speed it lists is half of the actual speed, right? So 975 would actually be 1950). Here's what CPU-Z says right now:



When I had it set to 1950 (or some weird number around that), it reported ~980. So should I stick to 1866, or go for the 1950ish instead? I don't think I can get it any higher than that without bumping those timings up to something ridiculous. Definitely not 2133, that's for sure.
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