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My PQI turbo ram won't overclock


aciddance

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To be fair its only rated at DDR400 (PC3200), so it might not go any frther than that.

 

 

yeah that kinda sux though, I bought some cheap . for one of my other pcs and I put it in the new machine and it is doing ddr500 @ 2.5 3 3 8 at 2.6v. Atleast I got lucky with this stuff. I will just sell the pqi crap to a friend that doesn't oc.

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As far as I know pqi uses TCCD for Turbo sticks. I've a pair of Turbo Relaxed Latency PC4000 and there are not more, not less, than TCCD 507 with PCB brainpower which is among the best of TCCD chips. My sticks bench @308MHz 2.5-4-3-7 with only 2.7V (instead of the rated 250MHz 2.5-3-3-7 @2.7V) and I've tried memtest up to 314MHz after validating stability @300MHz 2.5-3-3-7 @2.6V for 1 hour of looping memtest #5.

 

First of all, would you mind telling me the exact name of your sticks: the manufacturer list is here http://www.pqimemory.com/turbo_double.asp

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As far as I know pqi uses TCCD for Turbo sticks. I've a pair of Turbo Relaxed Latency PC4000 and there are not more, not less, than TCCD 507 with PCB brainpower which is among the best of TCCD chips. My sticks bench @308MHz 2.5-4-3-7 with only 2.7V (instead of the rated 250MHz 2.5-3-3-7 @2.7V) and I've tried memtest up to 314MHz after validating stability @300MHz 2.5-3-3-7 @2.6V for 1 hour of looping memtest #5.

 

First of all, would you mind telling me the exact name of your sticks: the manufacturer list is here http://www.pqimemory.com/turbo_double.asp

 

PQI3200-1024DBL

 

Everything I read I thought that these would have been a good choice but I can't even get into memtest with fsb higher than 205 no matter the sttings so far.

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I've sent an email to a pqi contact person (I'm a professional reseller so it might help :rolleyes: ) in order to be sure your sticks are made of TCCD chips: the rated timings 2-3-2-5 @200MHz are puzzling me as it seems me that TCCD would made 2-2-2-5 @200MHz like the PQI3200-512DBU... :confused: Let's see!

 

TCCD are usually hard to tweak anyway...

 

As you've probably noticed there’re bioses that better support TCCD or BH5; etc. Check here You may wish to use a "-1" bios for TCCD.

 

Once you've a bios that supports more precisely TCCD, may I suggest you to try these settings in the Bios (quite tight for using @300MHz and above, but actually quite relaxed @200MHz):

 

Vdimm : 2.8V

 

tCL-tRCD-tRP-tRAS : 2.5-3-3-5

 

tRC = 7 | tRFC = 14 | tRRD = 2 | tWR = 2 | tWTR = 2 | tRTW = 2 | tREF = 4708 | tWCL = 1 | DRAM Bank Interleave = Disable | DQS skew Control = Increase Skew | DQS Skew Value = 255 | DRAM Drive Strength = Auto | DRAM Data Drive Strenght = Level 2 | Max Asynce lantency = Auto | Read Preamble time =Auto | Idle Cycle Limit = 16 | Dynamic Counter = Enable | R/W Queue Bypass = 16x | Auto Bypass Max = 7x | 32 byte Granulation = Enable(4burst)

 

OR

 

tCL-tRCD-tRP-tRAS : 2.5-4-3-5

 

tRC = 7 | tRFC = 14 | tRRD = 2 | tWR = 2 | tWTR = 2 | tRTW = 2 | tREF = 4708 | tWCL = 1 | DRAM Bank Interleave = Disable | DQS skew Control = Increase Skew | DQS Skew Value = 255 | DRAM Drive Strength = Auto | DRAM Data Drive Strenght = Level 2 | Max Asynce lantency = Auto | Read Preamble time =Auto | Idle Cycle Limit = 16 | Dynamic Counter = Enable | R/W Queue Bypass = 16x | Auto Bypass Max = 7x | 32 byte Granulation = Enable(4burst)

 

If you prefer tweaking with A64tweaker check this screen (but I've experienced some obvious freezes while tweaking TCCD with A64tweaker):

 

CABCE0516WPMWSUPERPI1M28s.png

[Edit: I've used the 623-2 bios here but I wouldn't recommend you to do so]

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I've sent an email to a pqi contact person (I'm a professional reseller so it might help :rolleyes: ) in order to be sure your sticks are made of TCCD chips: the rated timings 2-3-2-5 @200MHz are puzzling me as it seems me that TCCD would made 2-2-2-5 @200MHz like the PQI3200-512DBU... :confused: Let's see!

 

TCCD are usually hard to tweak anyway...

 

As you've probably noticed there’re bioses that better support TCCD or BH5; etc. Check here You may wish to use a "-1" bios for TCCD.

 

Once you've a bios that supports more precisely TCCD, may I suggest you to try these settings in the Bios (quite tight for using @300MHz and above, but actually quite relaxed @200MHz):

 

Vdimm : 2.8V

 

tCL-tRCD-tRP-tRAS : 2.5-3-3-5

 

tRC = 7 | tRFC = 14 | tRRD = 2 | tWR = 2 | tWTR = 2 | tRTW = 2 | tREF = 4708 | tWCL = 1 | DRAM Bank Interleave = Disable | DQS skew Control = Increase Skew | DQS Skew Value = 255 | DRAM Drive Strength = Auto | DRAM Data Drive Strenght = Level 2 | Max Asynce lantency = Auto | Read Preamble time =Auto | Idle Cycle Limit = 16 | Dynamic Counter = Enable | R/W Queue Bypass = 16x | Auto Bypass Max = 7x | 32 byte Granulation = Enable(4burst)

 

OR

 

tCL-tRCD-tRP-tRAS : 2.5-4-3-5

 

tRC = 7 | tRFC = 14 | tRRD = 2 | tWR = 2 | tWTR = 2 | tRTW = 2 | tREF = 4708 | tWCL = 1 | DRAM Bank Interleave = Disable | DQS skew Control = Increase Skew | DQS Skew Value = 255 | DRAM Drive Strength = Auto | DRAM Data Drive Strenght = Level 2 | Max Asynce lantency = Auto | Read Preamble time =Auto | Idle Cycle Limit = 16 | Dynamic Counter = Enable | R/W Queue Bypass = 16x | Auto Bypass Max = 7x | 32 byte Granulation = Enable(4burst)

 

If you prefer tweaking with A64tweaker check this screen (but I've experienced some obvious freezes while tweaking TCCD with A64tweaker):

 

CABCE0516WPMWSUPERPI1M28s.png

[Edit: I've used the 623-2 bios here but I wouldn't recommend you to do so]

 

 

wow, thanks for all the info, I used the 623-3 bios for the first rounds of testing, and I tried all the voltages, but I will try that -1 bios to see if it will make a difference. I had almost given up on this ram for sure since my cheap stuff is getting such decent numbers right now.

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So, I've received an email from pqi, and as I was thinking about when looking at the timings, yours are not made of TCCD chips... Sorry dude; but they can't be bad anyway! :nod: 2-3-2-5 are not timings available for all RAMs.

 

May I ask you to take a screenshot of your timings in A64tweaker while running at stock parameters?

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