DDR2 Dominators

[Sixshot]

I'm sure there have been several Dominator threads before, but I didn't see any recent ones. Anyway, what are you guys' experiences with the DDR2 Dominators from Corsair, specifically the PC2-8500 (1066), 2 x 2GB kits.

What do these typically OC to? On the conservative end? On the extreme end? And at what timings/voltages?

I haven't bothered to push mine at all yet. Currently at a 4:5 ratio. At 425 FSB on my P5Q-E, the next step after 1066 is 11 something. 1130-1140. How safe would it be to set them to that? Would I need to loosen the timings at all?

Any thoughts and experience are welcome, as always. Happy Holidays!

[Rich'[ard]]

from my memory - which isn't all that great, they max out at about 1150mhz. this is with the maximum voltage covered by warranty. I presume you'd have to loosen the timings to 5-6-6-18 or something to reach that though.

EDIT: i was actually way off in my estimate. this should clear things up :thup:
http://www.techpowerup.com/reviews/Corsair/TWIN2X4096-8500C5DF/3.html

it says max oc with with c4 was 1026mhz! but tha'ts with 2.4v
2.1v could achieve about 1100mhz.
so i'd say aim for 1100mhz :)

[Sixshot]

Yeah...I might try the 1133 option...if I set the DRAM frequency to auto it just matches the fsb 1:1 (850). And I'm not really trying to go higher on the FSB. Or lower for that matter.

I probably won't even try for 1133 actually, which is the highest I'd go even if I did try to OC them. I just don't wanna have to increase voltage past 2.1. I also don't wanna have to run timings of 6 or worse just for a slight frequency bump. Ultimately I just don't feel like messing with it and testing it, and I don't feel it'd really be worth the effort lol.

[Sixshot]

Well...I guess I'll bump this thread once...to see if anyone else has something to say

I mean I know I'm not the only one running or who has ran some Dominators before :soda:

[MadMan007]

;5917759"]from my memory - which isn't all that great, they max out at about 1150mhz. this is with the maximum voltage covered by warranty. I presume you'd have to loosen the timings to 5-6-6-18 or something to reach that though.

EDIT: i was actually way off in my estimate. this should clear things up :thup:
http://www.techpowerup.com/reviews/Corsair/TWIN2X4096-8500C5DF/3.html

it says max oc with with c4 was 1026mhz! but tha'ts with 2.4v
2.1v could achieve about 1100mhz.
so i'd say aim for 1100mhz :)

That's certainly an interesting review. They got them to be quite flexible in terms of CAS and speed settings with reasonable voltages (=<2.1V.) I wonder what ICs they're using? Makes me think..hmmm...

[18 is # 1]

Those are Powerchips

TWIN2X4096/CM2X2048-8500C5DF
........................XMS850X v1.X...PSC...............128MX8
http://ramguy.com/v3/showthread.php?t=57334
My experience is that they don't gain much past 2.0v and usually max out about 1110-1150 MHz.

[MadMan007]

That's funny, the review shows them scaling with voltage above 2.1V and also doing quite a high speed for CAS4 the latter of which I find a little hard to believe, I'd think if there were not too expensive kits like this that could do those speeds+timings often we'd hear more about them. Maybe they are cherry-picked review modules. Do you have first-hand experience with these modules, with other 2x2GB PSC sticks, or...?

[18 is # 1]

That's funny, the review shows them scaling with voltage above 2.1V and also doing quite a high speed for CAS4 the latter of which I find a little hard to believe, I'd think if there were not too expensive kits like this that could do those speeds+timings often we'd hear more about them. Maybe they are cherry-picked review modules. Do you have first-hand experience with these modules, with other 2x2GB PSC sticks, or...?
You're right. PSC generally won't go much over 850 at Cas4. I have Mushkin Ascent 2x2 800s with PSC and Dominator 2x1 8500s with PSC. They both act identically...5-5-5-12 at 2.0v and 1110 MHz max. Additional voltage makes almost no difference.

[Sixshot]

Cool thanks for the info peeps. I thought they might hit 1200 or so safely, but maybe I guessed wrong.

May try the 1133 option, still deciding. If I did though, and I had to loosen timings, would it even be worth the effort?

[Grayfox]

i have these but 4X1GB sticks

what would be a good OC with good timings

[18 is # 1]

i have these but 4X1GB sticks

what would be a good OC with good timings

If they are version 4.x they are PSC and will do basically the stated above

CM2X1024-8500C5
........................XMS850X v1.X...MICRON.........64Mx8...Rev.D (2.2 Volts)
........................XMS850X v2.X...Qimonda........64Mx8...70Nm (2.1 Volts)
........................XMS850X v3.X...Elpida............64Mx8...(2.2 Volts)
........................XMS850X v4.X... PSC ..............128Mx8 (2.1 Volts)

[Grayfox]

mine are 1.2

[MadMan007]

Something doesnt add up between the review and 18 is #1's most recent post. I'm trying to compare information right now...I'm interested because I'm pondering trying a different 2x2GB set atm.

[Zhut]

I am also interested in this ram set to possibly try out when I see a nice price drop. I would be grabbing 8 gigs of it though so wondering how friendly it is with 8 gigs installed. Perhaps I can get higher on my 1:1 fsb over my current g skill pi 6400. The ram coolers are kinda neat.

[Zhut]

Bumping this thread to see/hear some more info on those with this ram. I can get my current ram in sig with 8gigs up to 1000 with loosened timings, will these dominators really go much beyond that being innate 1066? Anyone packing 8 gigs of these dominators, can shed some light? Thank you in advance. I would be upset if I was not able to see/reach a decent improvement over my current ram. I notice these dominators do drop in price now and again.

[18 is # 1]

Those should hit 1100 quite easily in 2x2 configuration. 2x4gb depends more on your mobo.

[Rich'[ard]]

Something doesnt add up between the review and 18 is #1's most recent post. I'm trying to compare information right now...I'm interested because I'm pondering trying a different 2x2GB set atm.

hey, i'm not sure if i checked right, but i did link the review for 2x2gb and not 2x1gb right? because that could make a huge difference lol.

also, Powerchips make no difference when you go over 2.2v. last time i tried, 2.3v actually made my whole computer slower :shrug: like it was as if i only had 667mhz ram at cas7. it was that slow.

[MadMan007]

Nah the review looks to be a 2x2GB kit. I was looking closely at various part numbers on the sticks pictured in the review and comparing them to Corsair's website. But what looks off on that review is pretty simply the speeds he gets at rated voltage and CAS4. I mean, if the kits were able to consistently hit DDR2-1000+ with 2.1V CAS4 you'd think they'd be heavily recommended as the #1 choice above all others rather than simple 'this is one option.'

Now I don't doubt that the results are correct as tested, maybe they got a cherry-picked kit to review, but I think I can see on the results page what makes them seem so good. They test at very low FSB (compared to what people actually use for FSB) and a high 2:3 RAM multiplier. Now normal overclocking methodology you'd think 'Hey that means the RAM itself can run that speed and that's it' but in reality a more normal FSB puts much more strain on the NB connection so those frequency results probably aren't accurate for actual oc's. Whether you want to say it's the RAM, the NB, or the CPU is up for argument but the fact is I don't see people posting those results at more normal RAM dividers used for every day oc's for that kit (or nearly any DDR2-1066 CAS5 'standard' kit for that matter.)

[Rich'[ard]]

ahhh. i see now. :thup:
those results seemed like D9 territory. it isn't usual to see 4gb kits doing 1200mhz at cas5, let along on 2.4v

wonder if there's another review of this Corsair Ram.

[MadMan007]

Yeah it's the CAS4 results that seem especially off. Then again maybe it's one of these:

TWIN2X4096/CM2X2048-9136C5DF
........................XMS850X v1.X....PSC............128MX8

DDR2-1142 rated/capable kits from the ramguy link 18 is #1 linked that slipped through testing to fill DDR2-1066 orders.

[Rich'[ard]]

can you still buy the 8888C5DF kits? i remember them being able to pull off 1000mhz on cas4. could be them. :shrug:

i've never/rarely seen powerchip kits oc when more than 2.1v has been used.
i also came across this comment on Newegg about my reaper x kit, saying he could reach 1200mhz. i'd really like to know how.

[MadMan007]

Yeah I don't think those high-bin kits are available any more, maybe they couldn't get enough of them or no one would pay the asking price nowadays. Could be that everyone once in a while there's a kit that happens to be that good though...it's just fishy when it ends up in a reviewer's hand ya know? ;)

[Zhut]

Does anyone run 8gigs of this Dominator ram and can let me know if the ram will reach 1066 or higher with 8gigs installed? I am trying to run 1:1 and my ram is holding me back.

[ObiWong]

Does anyone run 8gigs of this Dominator ram and can let me know if the ram will reach 1066 or higher with 8gigs installed? I am trying to run 1:1 and my ram is holding me back.

have you tried increasing northbridge volts?

[Zhut]

have you tried increasing northbridge volts?

No I have not tried increasing the northbridge volts yet but I am using the ram in my sig, not the Dominators. My pc6400 Gskill pi flakes out at 910mhz at 4-4-4-12

At 5-5-5-15 My Gskill pi flakes out for gaming seemingly at 956mhz which has been limiting my fsb to 478. I would like to be able to run a fsb 500mhz+ 1:1 this is why I am curious of the success of others with 8gigs of these Dominators. I would not want to buy them if they cannot even reach my current pc6400 speeds, I would hope they would greatly pass my pc6400.

[Steven-1979]

1130-1140. How safe would it be to set them to that? Would I need to loosen the timings at all?

I'm running mine at about those speeds ... didn't have to loosen the timing. Just upped the volts to 2.2v from 2.1v. It was either that or run them at 950mhz ... I haven't tried to go any further though.

[Zhut]

Thanks for posting your info on this ram Steven-1979 I may just have to grab some to try out. If I end up running 8 gigs of these Dominators I will post back.

[stevendblanshan]

My setup uses the following ram but I have it running at 832/real 416 no probs. was 667/real 333 still is 5-5-5-15

Module Name Transcend JM667QSU-2G
Serial Number 0007B095h (2511341312)
Manufacture Date Week 44 / 2007
Module Size 2 GB (2 ranks, 8 banks)
Module Type SO-DIMM
Memory Type DDR2 SDRAM
Memory Speed DDR2-667 (333 MHz)
Module Width 64 bit
Module Voltage SSTL 1.8
Error Detection Method None
Refresh Rate Reduced (7.8 us), Self-Refresh

Memory Timings
@ 333 MHz 5-5-5-15 (CL-RCD-RP-RAS) / 20-43-3-5-3-3 (RC-RFC-RRD-WR-WTR-RTP)
@ 266 MHz 4-4-4-12 (CL-RCD-RP-RAS) / 16-34-2-4-2-2 (RC-RFC-RRD-WR-WTR-RTP)
@ 200 MHz 3-3-3-9 (CL-RCD-RP-RAS) / 12-26-2-3-2-2 (RC-RFC-RRD-WR-WTR-RTP)

Memory Module Manufacturer
Company Name Transcend Information Inc.
Product Information http://www.transcendusa.com/Products/MemList.asp?srhMemWay=STD&LangNo=0

[18 is # 1]

Does anyone run 8gigs of this Dominator ram and can let me know if the ram will reach 1066 or higher with 8gigs installed? I am trying to run 1:1 and my ram is holding me back.

Can your FSB hit 533?

[Zhut]

Can your FSB hit 533?

I do not see why it wouldnt hit fsb 533. My Gskill ram is not letting me hit 500with 1:1. That is why I was thinking higher rated ram would get me there since my pc6400 ram is not. How can I know if my fsb will do 533+ without having ram that can run at that speed 1:1?

[lookus]

I'm running mine at about those speeds ... didn't have to loosen the timing. Just upped the volts to 2.2v from 2.1v. It was either that or run them at 950mhz ... I haven't tried to go any further though.

could you please let me know what your memory settings are in bios?



i am running a fsb of 470 mhz and i am trying to run my corsairs at 1130mhz but no joy so far. can anyone help me in terms of what settings to try?i read that changing the read to write delay etc can help.or nb clock skew?

my bios settings are below-

JumperFree Configuration Settings:

AI Overclock tuner: Manual
CPU Ratio Setting: 8.5
FSB Strap to North Bridge: auto
FSB Frequency: 470
PCI-E Frequency: 101
DRAM Frequency: 1130
DRAM CLK Skew on Channel A1: AUTO
DRAM CLK Skew on Channel A2: AUTO
DRAM CLK Skew on Channel B1: AUTO
DRAM CLK Skew on Channel B2: AUTO
DRAM Timing Control: Manual

1st Information :

CAS# Latency: 5
DRAM RAS# to CAS# Delay: 5
DRAM RAS# Precharge: 5
DRAM RAS# Activate to Precharge: 15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time: auto
Write Recovery Time: AUTO
Read to Precharge Time: AUTO

2nd Information :

READ to WRITE Delay (S/D): AUTO
Write to Read Delay (S): AUTO
WRITE to READ Delay (D): AUTO
READ to READ Delay (S): AUTO
READ to READ Delay (D): AUTO
WRITE to WRITE Delay (S): AUTO
WRITE to WRITE Delay (D): AUTO

3rd Information :

WRITE to PRE Delay: AUTO
READ to PRE Delay: AUTO
PRE to PRE Delay: AUTO
ALL PRE to ACT Delay: AUTO
ALL PRE to REF Delay: AUTO
DRAM Static Read Control:off
DRAM Read Training: off
MEM. OC Charger: on
AI Clock Twister: lighter
AI Transaction Booster: auto

CPU Voltage: 1.24375
CPU GTL Voltage Reference (0/2): .635
CPU GTL Voltage Reference (1/3): .670
CPU PLL Voltage: 1.54
FSB Termination Voltage: 1.28
DRAM Voltage: 2.06
NB Voltage: 1.28
NB GTL Reference: .635
SBridge Voltage: 1.2
PCIE SATA Voltage: 1.50

Load Line Calibration: Enabled
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Disabled
CPU Clock Skew : Auto
NB Clock Skew : Auto
Cpu margin enhancement : OPTIMIZED

Advance CPU Settings
CPU Ratio Setting: 8.5
CPU VID: 1.2125
C1E Suppport: Disabled
Max CPUID Value Limit:off
Intel® Virtualization Tech: off
CPU TM Function: ENABLED
Execute Disable Bit: ENABLED

help would be greatly appreciated. with 4.0ghz cpu i would love to get these to run at 1130mhz.

thanks