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  #21 (permalink)  
Old 4th March, 2003, 05:31 AM
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Location: San Diego, California
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8RDA+ 2100B - 450 Rhycom Power Supply
12 X 200 = 2405 CPU v.= 1.75 SK-800 with low noise fan (40Cidle 45Cload)
3129 Bios, Win XP, SP1
ATI Radeon 9500Pro (Warp11 bios. Rage 3D o/c Mem=310Mhz Core=357.75Mhz)
1 x 256 Corsair XMS3500CL2 5,2,2,2
Promise TX2000 Raid with 2 WD40MB - 8MB Cache
Fan and Artic Silver on NB. Southbridge HeatSink & Fan, Artic Silver.
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  #22 (permalink)  
Old 4th March, 2003, 02:04 PM
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Well, i went ahead and ordered a twin pack of Corsair pc3200 XMS-3200LL from newegg.

Ive had nothing but great experiences with Corsair XMS ram.
So im sure i'll be more than pleased with its performance as usual.

As far as OCZ ram... well, they DEFINATELY earned their poor reputation.

I have 2 x 256 mb sticks of pc3500(ddr433mhz) here that wont even do 400mhz at 15 7 7 3.0 timings, let alone the rated 2 3 3 2.5 speeds its rated at.

I knew oCZ had a bad rep, but i figured ddr433 ram would do 400mhz!

Guess I was wrong.
Definately my 1st AND last OCZ purchase!

Thanks for the info guys, much appreciated.
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  #23 (permalink)  
Old 4th March, 2003, 02:13 PM
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Posts: 105

Re: 8rda+ Are you over 200fsb? How about answering questions.

Quote:
Originally posted by mtdew332
1: What namebrand/ speed of ram do you have?
2: 1 or 2 sticks?
3: Are you running your ram in sync with your fsb?
4: Are you running dual channel?
5: If dual channel, what dimm slots?
6: What voltage is you ram at?
7: Whats your mem timings in bios?
1. OCZ Enhanced Latency PC3500
2. 2 Sticks
3. yes
4. yes
5. 1 & 3 (but 1 & 2 also work for me)
6. default
7. 5-2-2-2 @ 210MHz

Not modded in any way, neither northbridge nor southbridge or mosfets are cooled. bought the stuff for cooling them but I've been too lazy to install them yet.
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  #24 (permalink)  
Old 4th March, 2003, 03:34 PM
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Maybe Im being a bit hasty flaming OCZ ram.

I can run my fsb up to 220 without the ram in sync.
I put the cpu multiplier where i wasnt OC'ng my cpu and kept the ram at ddr333 speeds to test this.

Ive just finished testing the ram at 217 using memtest86....it passes with no errors!
I put the multiplier at 11.5 x 173fsb = 1999mhz so i wasnt OCing cpu.(im using a 2400xp)
Then set my ram to 125% which allowed me to test my ram at 217mhz.

Now my question is..
1: If my mobo can do 220fsb
2: If my ram can do 217

Then why in the world cant i even achieve 200/200 in sync??

I cant do 200/200 in single or dual channel.
The OCZ site says that the 8RDA has issues above 190fsb, and you should run the ram outta sync to get maximum stability.

I figured that was a bunch of B.S. and they were just making excuses, but now im not so sure!


Hers what OCZ say on their site....... OCZ 8RDA page Ah POOP! I cant direct link to the page, sorry.

Summary: We have completed testing on the Epox 8RDA+ motherboard based on the Nvidia Nforce2 chipset. OCZ PC2700 EL Dual Channel DDR through OCZ PC3500 EL Dual Channel DDR have been tested 100% stable and reliable using 2x256 and 2x512.

Tip #1

The Epox 8RDA exhibits stability issues when using an FSB above 190. This is due to the Voltage sag (VDQ) to the northbridge chipset. If your having problems with running the 8rda above 200FSb in sync mode, it is a typical issue that most users adress with a motherboard replacement or by increasing the Northbridge cooling. Some users have had good luck with voltage moding the northbridge chipset.
Another frequent annomoly is in use conjunction 166FSB processors ( such as the AthlonXP 2600+ ) which limits its ability to achieve higher than 183 FSB when the mutliplier is dropped. Memory timings must be entered manually in the BIOS.


Tip #2

Achieving beyond 180FSB with an AMD Thoroughbred Revision A CPU is problematic and this issue has not yet been addressed by either AMD nor motherboard manufacturers.




Recommended OCZ Memory Modules:
Recommended settings for OCZ PC2700 EL Dual Channel DDR are in synchronous mode with the FSB at 166, and timings set to 2-2-5-2 with 2.6V. Recommended settings for the OCZ PC3200 EL Dual Channel DDR is with the FSB set to 166 and the memory asynchronous at 200MHz with the timings of 2-2-2-6 Recommended settings for the OCZ PC3500 EL Dual Channel DDR is with the FSB set to 166 and the memory asynchronous at 217Mhz ( 217x2 = 434Mhz ) with the timings of 2-3-7-3.

What the fook?
I have no idea why they would suggest running out of sync, but it DOES work !

Heres hoping my Corsair lewts me run in sync.. :beer:
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Last edited by mtdew332; 4th March, 2003 at 03:37 PM.
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  #25 (permalink)  
Old 4th March, 2003, 05:07 PM
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Well, I'm satisfied with my 8RDA+ / OCZ combo. 210MHz sync without any modification are very good I think. I could go further by cooling some important components but, as I said, I'm too lazy atm.

btw, I even managed to run these settings while I used ram banks 1 & 2 for over two months.
this is absolutely not recommended as I was informed later but I just did that by mistake.
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  #26 (permalink)  
Old 4th March, 2003, 05:54 PM
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Well, i just got back from Radioshack, gonna tackle this vdd mod and see if it helps.

Im still gonna switch to my Corsair XMS ram when it shows up tomorrow cuz its low latency ram.

I will post back if the mod works, I have no intention on flaming a namebrand if its not the rams fault.

Seems running in "sync" is a bit flakey cuz out of sync both mobo and ram do over 215.
Hopefully, the vdd mod will fix this.

BTW: "out of sync" I was able to run the ram at 8 3 3 2 / 217mhz
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  #27 (permalink)  
Old 4th March, 2003, 09:33 PM
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Well my vdd mod went just fine, its at 1.85 now.(was 1.58 b4)

1st I must say if it wasnt for so many people needing to do the vdd mod and risk frying their hardware, this would be the ULTIMATE mobo.

Seems theres always something youve gotta mod.

Anywhoo... it seemed to do the trick.
So far ive been able to get my ram & fsb in SYNC/dual channel at 205mhz.
Of course im running VERY relaxed ram timings, not because I HAVE to, just until I find the rams limit.
Then I'll "tighten" up the timings.

Im sure it will go higher, but with an unlocked multiplier, up to 250fsb options, ram timings and voltages that could overheat a cpu in my watercooled setup, it could take quite awhile to find out my systems max speed and stability.

I will however fully test the system with the OCZ ram to find its limits b4 putting My Corsair XMS in.
Just out of curiosity.

I'll do that tomorrow.
For now i'm more than happy and very surprised I even broke 200fsb with stability.

I was beginning to think my 8RDA+ was dud...lol

My vdd mod may have been a success, but if any friends buy this mobo, they're doing it THEMSELVES!

Even with a magnifying glass and steady hands, keeping the solder from touching unwanted "legs" was tedious. (I used a 680-ohm resistor)

I was paranoid all the way up until I 1st powered up my system. LOL
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  #28 (permalink)  
Old 4th March, 2003, 11:06 PM
LL_NEO's Avatar
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225 fsb

1 stick of 512MB Corsair XMS3500
sync
2.9 vdimm
aggresive,6,2,2 CL2
no cooling/vdd/vdimm mod at all

---------------------------------------------------------------

I putted a titan chipset cooler on the northbridge. I took the stock cooler superglued the fan from a crystal orb and putted it on the southbridge. I also putted a bunch of heatsinks at mosfets and vreg. After all these I can boot up to 230(sync) but even with relaxed timings I get BSOD within 2-5 minutes. Maybe it's memory related so I'll try to find an experienced person to make the vdimm mod
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Athlon XP 2100+ TBredB AIUHB 0250 @ 11X220(sync) | Thermochill 120.3 | 11's cpu+gpu+nb | EPoX 8RDA3+ rev 3.1 | 1x512MB Corsair XMS 3500@5-2-2 | Club3D 9800 pro | Soundblaster Audigy | Real Magic Hollywood Plus | Pinnacle PCTV Pro | Maxtor 200GB Diamond Plus 9 | Pioneer 106s | Plextor 708A | Enermax 465W | LianLi PC70

Last edited by LL_NEO; 4th March, 2003 at 11:16 PM.
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