GA-EP45T-DS3R DDR3-1600 So far so good

[hank123]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

Using the 4.00 memory multiplier:
cpu = 400MHz x 4.0 = 1600MHz memory speeds
cpu = 410MHz x 4.0 = 1640MHz memory speeds
cpu = 420MHz x 4.0 = 1680MHz memory speeds
cpu = 430MHz x 4.0 = 1720MHz memory speeds
cpu = 440MHz x 4.0 = 1760MHz memory speeds
cpu = 450MHz x 4.0 = 1800MHz memory speeds

Using the 3.20B multiplier, you can reach similar speeds if your cpu host frequency is 25% higher, for example:
cpu = 500MHz x 3.2 = 1600MHz memory speeds

Ya only problem. It wont post. I have yet to see anyone get high speeds.

[hank123]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

If anyone has ideas please let me know

[creamsoda]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

GUYS DO NOT USE THE 3:5 DIVIDER. It is bugged. Run everest and see for your self.

before you make another post here, keep in mind, this thread is about the "EP45T-DS3R", not UD3P. =/

[ghost707]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

Well,
This is about where I sit now.
The system won't win any speed contests, but it is stable, runs relatively cool and has decent throughput - considering the lower RAM frequency.
The differences in Flight Simulator are definitely noticeable.
I may run some tests raising the FSB for kicks and grins.

MB Intelligent Tweaker(M.I.T.)
Robust Graphics Booster .............: [ Auto ]
CPU Clock Ratio .....................: 8 X  
Fine CPU Clock Ratio.................: +0.5  
CPU Frequency .......................: 3.65GHZ (430x8.5)

Clock Chip Control
Standard Clock Control
CPU Host Clock Control...............: [ Enabled ]
CPU Host Frequency (Mhz) ............: 430  
PCI Express Frequency (Mhz) .........: 100 
C.I.A.2 .............................: [ Disabled ]

Advanced Clock Control [Press Enter]
CPU Clock Drive......................: [ 800 mV ]
PCI Express Clock Drive..............: [ 900mV ]
CPU Clock Skew (ps)..................: [ 0ps ]
MCH Clock Skew (ps)..................: [ 0ps ]

DRAM Performance Control
Performance Enhance..................: [ STANDARD ]
(G)MCH Frequency Latch...............: [ AUTO ]
System Memory Multiplier ............: 3.20B  
Memory Frequency (Mhz) ..............: 1376
DRAM Timing Selectable ..............: [ Manual ]

Standard Timing Control
CAS Latency Time.....................: 7 
tRCD ................................: 7 
tRP'.................................: 7 
tRAS.................................: 20 

Advanced Timing Control
tRRD.................................: 5 
tWTR.................................: 5 
tWR..................................: 9 
tRFC.................................: 60 
tRTP.................................: 5 
Command Rate (CMD) ..................: 2


Channel A
Static tRead Value...................: 8
tRD Phase0 Adjustment................: 0 [ AUTO ]
tRD Phase1 Adjustment................: 0 [ AUTO ]
tRD Phase2 Adjustment ...............: 0 [ AUTO ]
tRD Phase3 Adjustment................: 0 [ AUTO ]
Trd2rd(Different Rank)...............: 9 [ AUTO ]
Twr2wr(Different Rank)...............: 7 [ AUTO ]
Twr2rd(Different Rank)...............: 8 [ AUTO ]
Trd2wr(Same/Diff Rank)...............: 8 [ AUTO ]

Channel B
Static tRead Value...................: 8
tRD Phase0 Adjustment................: 0 [ AUTO ]
tRD Phase1 Adjustment................: 0 [ AUTO ]
tRD Phase2 Adjustment ...............: 0 [ AUTO ]
tRD Phase3 Adjustment................: 0 [ AUTO ]
Trd2rd(Different Rank)...............: 9 [ AUTO ]
Twr2wr(Different Rank)...............: 7 [ AUTO ]
Twr2rd(Different Rank)...............: 8 [ AUTO ]
Trd2wr(Same/Diff Rank)...............: 8 [ AUTO ]


Motherboard Voltage Control
Voltage Type...............
CPU
CPU Vcore............................: 1.31875V
CPU Termination….....................: 1.260V
CPU PLL..............................: 1.570V
CPU Referen..........................: 0.760V [ AUTO ]


MCH/ICH
MCH Core.............................: 1.240V 
MCH Reference........................: 0.778V 
MCH/DRAM Ref.........................: 0.750V [ AUTO ]
ICH I/O......................….......: 1.570V 


DRAM
DRAM Voltage ........................: 1.860V
DRAM Termination ....................: 0.750V [ AUTO ]
Ch-A DATA VRef.......................: 0.750V [ AUTO ]
Ch-B DATA VRef.......................: 0.750V [ AUTO ]
Ch-A Address VRef....................: 0.750V [ AUTO ]
Ch-B Address VRef....................: 0.750V [ AUTO ]

Advanced Settings
Limit CPUID Max. to 3...............: [ DISABLED ]
No-Execute Memory Protect...........: [ ENABLED ]
Load-Line Calibration...............: [ DISABLED ]
CPU Enhanced Halt (C1E).............: [ DISABLED ] 
CPU Thermal Monitor 2(TM2) .........: [ ENABLED ]
CPU EIST Function...................: [ DISABLED ] 
Virtualization Technology...........: [ ENABLED ] 

USB Legacy Support..................: [ DISABLED ]

[ghost707]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

A before and after:

[creamsoda]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

I'd like to add a very important piece of information.

The MCH reference % that you set, should depend on how high you want to set your VTT. It seems the % should be lowered, if you're using high VTT voltage.

For example 1.2v VTT may be stable with 0.700v MCH ref, but if you plan on raising the VTT to 1.28v, then you may have to decrease MCH ref to 0.680v to get it stable.

This is something that is REALLY hard to get precise, because even a 12hr Prime95 or 10hr OCCT can miss this if you're off by just 0.02v on the MCH ref.

[ghost707]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

Through testing, I found that .74V (1.2V Vtt) was the lowest I could go and get OCCT to pass at 20 minutes.
.78V would fail after about 3 minutes, so it looks like it was between .74 and .77 roughly.

It seems Gampamu's setup has him going in the opposite direction.

[creamsoda]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

It seems Gampamu's setup has him going in the opposite direction.

I hate to sound rude, but Gampamu was in the wrong thread in the first place. He clearly needed help with an "ep45t-ud3p" board, not DS3R.

and seeing his vCore in his CPU-z screenshot, makes me believe that his overclock is not even near stable yet.

[ghost707]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

I am going to pass the 1400 barrier on the ram - and do some testing. Who knows.
But from what I can see, I am at the bottom end of my cas window, although I am not too sure if it will work - since this RAM is almost certainly 1333 with with some extra aluminum thrown on.

[ghost707]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

Re-reading the article ProfJim posted about my particular set of Ram - looks like I may be wrong - and that it is indeed 1600. Corsair's recommendation being using 1800, 2000 or low latency 1600 on P45 boards.

[ghost707]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

So if I am correctly getting the big picture here, Vtt and MCH ref are going to affect ripple on VCore.

[gampamu]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

I hate to sound rude, but Gampamu was in the wrong thread in the first place. He clearly needed help with an "ep45t-ud3p" board, not DS3R.

and seeing his vCore in his CPU-z screenshot, makes me believe that his overclock is not even near stable yet.

You must have me mixed up with someone else. I don't have an EP45T-UD3P board (I have the non T model), I never posted a CPU-Z SS, nor am I looking for any overclocking help.

Ghost707, I believe this article may help you better understand the VTT/MCH reference. Global

[hank123]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

before you make another post here, keep in mind, this thread is about the "EP45T-DS3R", not UD3P. =/

ya the ds3r is 1 PCI-E slot different from mine pretty much

[creamsoda]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

ya the ds3r is 1 PCI-E slot different from mine pretty much

no no.. trust me, it's not just "1 PCI-E slot" different.

The difference between the stability in UD3P & DS3R is HUGE. I own both boards, and I can say that the UD3P is a much more powerful board in overclocking. They're two completely different boards.


@Gampamu, yeah sorry, I had you confused with hank123 lol

[profJim]

Re: GA-EP45T-DS3R DDR3-1600 So far so good

I don't want to cause any trouble.....
....uhh....yes I do.
FYI for ghost707

Snip from post #11 Corsair forum thread for P45 mobos and DDR3 memory (Ram Guy, Corsair Product Guru)

Testing done in our labs has concluded that users looking for the best overclocking results at 4GB on a P45-based DDR3 motherboard will have the best results using the following parts:

TW3X4G1800C8DF
TW3X4G2000C9DF
TW3X4096-1600C7DHX

The following part may top out at a speed short of 1600MHz on a P45-based motherboard:

TW3X4G1600C9DHX

=====================================
Common sense and good business practice dictates that Corsair should make good on their guaranteed-compatible memory.
I've provided the ammo, you get to pull the trigger.

From the Corsair's website Memory Configurator:

Guaranteed-Compatible Memory for your Gigabyte GA-EP45T-DS3R

Featured Memory: TW3X4G1333C9DHX

Complete list of compatible modules for this motherboard:

TW3X4G1600C6GTF ..(2x2GB)
TW3X4G1600C9DHX ..(2x2GB) <---- your memory
TW3X4G1333C9 ....... (2x2GB)
TW3X4G1333C9DHX ..(2x2GB)
TW3X2G1600C9DHX ..(2x1GB)
TWIN3X2048-1333C9 (2x1GB)