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GA-EP45-UD3P RAM speed

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March 20, 2010 3:17:54 AM

I have just built a new system using GA-EP45-UD3P mobo and it boots and runs well. I have 2 Kingston KHX6400 D2K2/4G (2.0v) memory sticks in slots 1 and 3. Each stick shows up as 2G RAM at 677 speed. I tweaked RAM voltage up from 1.79v to 1.98v and still see the same results.

My question, can I do something to get the Mobo to see the RAM as 4G speed 800, buy new memory or just live with it? I am not sure about doing bios upgrades as I have seen a lot of horror stories and I have little experience in this area.


2.67 gigahertz Intel Core2 Quad Q9450
64 kilobyte primary memory cache
6144 kilobyte secondary memory cache
64-bit ready
Multi-core (4 total)
Not hyper-threaded

HD is 160G Intel SSD
PSU is Kingwin 730W

Board: Gigabyte Technology Co., Ltd. EP45-UD3P
Bus Clock: 333 megahertz
BIOS: Award Software International, Inc. FB 05/20/2009

Slot 'A0' has 2048 MB
Slot 'A1' is Empty
Slot 'A2' has 2048 MB
Slot 'A3' is Empty

More about : ep45 ud3p ram speed

a b } Memory
a c 177 V Motherboard
March 20, 2010 11:10:29 AM

Have you done the (obligatory) "Load Optimized Defaults" from the BIOS since you assembled it? If that doesn't work, I can give you settings. What do you use for a CPU cooler - has nothing to do with the wrong RAM clocking - has to do with settings...
March 20, 2010 6:20:39 PM

bilbat said:
Have you done the (obligatory) "Load Optimized Defaults" from the BIOS since you assembled it? If that doesn't work, I can give you settings. What do you use for a CPU cooler - has nothing to do with the wrong RAM clocking - has to do with settings...


I have done the optimized defaults, it didn't change the problem. My CPU Cooler is a Zalman CNPS9500 AT, CPU temp rumming at 23C
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a b } Memory
a c 177 V Motherboard
March 20, 2010 7:13:27 PM
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A lot of this is 'canned' - so if you've seen parts of it before, skip ahead!

GA-EP45-UD3P
Intel Q9450 1333FSB x8.5mult 2.66GHz 3.20GHz .85-1.3625V
Kingston KHX6400D2K2/4G 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 memory: 5-5-5-15-?t nominal 1.85v:
http://www.valueram.com/datasheets/KHX6400D2K2_4G.pdf

Gentle (but noticeable), no-risk, low-voltage Overclocking parameters are in italics...

If you haven't yet done it, pull one stick, start with a BIOS' "Load Optimized Defaults"

Before we start ramping things up, I want to teach you a new skill involving the BIOS: Do the <DEL> at the boot to enter the BIOS; notice, at the bottom, the <F11> "Save CMOS to BIOS" - hit this, and you should get a menu that will show a number (the count varies by BIOS) of empty 'slots', each of which will store an entire set of BIOS parameters, to be re-loaded from the corresponding <F12> "Load CMOS from BIOS"; this is a wonderful overclocker's feature. What I do with it, is to save my 'baseline' working parameters, so if I change something that 'irritates' the board, and forces a reset of all the parameters to defaults, or, even worse, get so screwed up I need to do a 'clear CMOS', I can get back to my starting point with no effort, and without having to remember 85 separate settings! Another thing it prevents is two hours' troubleshooting, having forgotten a change to a crucial parameter - like, "wait a minute - didn't I have the Trd at seven?!" It's pretty self-explanatory, and I always urge people to start right away by taking the time to give the 'slots' names that mean something: in two hours, "Try2" and "Try3" will not be very helpful, but "450@+10MCH" and "450@+15MCH" will! Another use is for 'green' settings; overclocks, as a rule, do not 'play well' with green features, such as 'down-clocking' and 'down-volting'; with the storage slots, you can set up one profile, say "Green", with all the settings at 'stock' values, and all the 'green' features enabled; another, say "Balls2Wall" with a full overclock, and all the 'green' stuff turned off...

Another neat feature of this 'slot' system is, for most BIOS, the mechanism itself will keep track of which ones have booted successfully, and how many times (up to, I believe, a max of five)!


On the "Advanced BIOS Features" page:

"CPU Enhanced Halt (C1E)" to "Disabled"
"C2/C2E State Support" to "Disabled"
"C4/C4E State Support" to "Disabled"
"CPU Thermal Monitor 2 (TM2)" to "Enabled"
"CPU EIST Function" to "Disabled"
"Virtualization Technology" to "Enabled" - this allows use of Win7's fantastic VirtualXp feature...
"Full Screen LOGO Show" to "Disabled"

On the "Integrated Peripherals" page:

Your manual shows "Legacy USB storage detect", but later BIOS say "USB Storage Function" - either way, set to "Disabled"

On the "Power Management Setup" page:

"ACPI Suspend Type" to "S1(POS)" (for now...)
"HPET Support" to "Enabled"
"HPET Mode" to whichever OS type you're running - "32-bit" if an x86 version, "64-bit" if an x64 version...

On the "MB Intelligent Tweaker(M.I.T.)" page:

"Robust Graphics Booster" to "Auto"
"CPU Clock Ratio" to "8"
"Fine CPU Clock Ratio" to ".0"
"CPU Frequency" - this one can't be set, it's calculated, and will change when we set the next few items...

******** Clock Chip Control ********
>>>>> Standard Clock Control

"CPU Host Clock Control" to "Enabled"
"CPU Host Frequency (Mhz)" to "334"
"CPU Host Frequency (Mhz)" to "401"
"PCI Express Frequency (Mhz)" to "100" (not auto...)
"C.I.A.2" to "Disabled"

******** DRAM Performance Control ********
"Performance Enhance" to "Standard"
"Extreme Memory Profile (X.M.P.)" to "Disabled"
"(G)MCH Frequency Latch" to "333"
"System Memory Multiplier (SPD)" to "2.4B"
"(G)MCH Frequency Latch" to "400"
"System Memory Multiplier (SPD)" to "2.0D"
"DRAM Timing Selectable (SPD)" to "Manual"
"CAS Latency Time" to "5"
"tRCD" to "5"
"tRP" to "5"
"tRAS" to "15"
"Command Rate(CMD)" to "2T" (you can try it later at '1T' if this works OK otherwise...)

"(G)MCH Frequency Latch" which we mostly refer to as a 'strap', is the reason we used a 401 clock instead of a nice even 400: the 'straps' are sets of northbridge timings - much like memory latencies, the faster you go, the 'looser' the timings have to be... There are four straps, corresponding to the Intel FSB ratings: 200 (800FSB), 266 (1066FSB), 333 (1333FSB), and 400 (1600FSB - Intel actually does make a 1600 FSB CPU - the QX9775 - but, I think, it's over $1500 a pop!); each strap has its own set of available memory multipliers (ratios). The 2.0 we used (which is actually an 1:1 bus to bus ratio) is available only on the 333 and 400 strap. Anyway, the strap latencies, for some northbridges, don't 'kick in' until one over the selected strap; so,in other words, setting the clock to 401 guarantees that we're getting the 400 latencies/timings...

"Memory Frequency (Mhz)" - again, can't be set, it's calculated...
"MCH Core" to 1.150V"
& "DRAM Voltage" to "1.850V" (might be expressed as: "+0.05V")

And that should do it!

I should point out that getting two reboots in a row here is perfectly normal behavior; it seems that, when you change certain settings (and we don't exactly know which ones - the only sure one I know is Trd - if you change it, I think you get the 'twin' reboot) it boots once to 'see where it's at', recalculates its remaining 'auto' settings, saves them, and then boots again. Three reboots in a row, however, usually indicates that the board was 'given indigestion' by your settings, and is going back to defaults. This sometimes goes astray, and it doesn't get back into proper operation - for example, at this point, mine will sometimes 'lock' itself into 111MHz x a six multiplier - and take a week to do a whole boot - that's time to do a CMOS reset, and use your 'stored' <F12> profile to get back to where you were...

Good luck!

Bill
March 20, 2010 10:42:57 PM

Bill,
I ran into a couple of minor issues.

Under Advanced Bios Features, I had no "C2/C2E Support" listed and thus could not change.
Same with "C4/C4E Support" not listed, could not change.

Under "DRAM Performance Control", I had no "Extreme Memory Profile (X.M.P.) listed, thus could not disable.

I found the :Command Rate(CMD) under "Advanced Timing Control options and entered "2", no 2T.
I noticed that there was CHANNEL A & B "Timing" and "Driving" options. on the second time through I changed the SLot A & B Driving from "auto" to "800" MHz but it also came up as 2G memory.

Good news is that the CPU is overclocked from 2.66 to 3.20 and stable.

THanks for your good advice
Mike





1883034,4,354670 said:
A lot of this is 'canned' - so if you've seen parts of it before, skip ahead!

GA-EP45-UD3P
Intel Q9450 1333FSB x8.5mult 2.66GHz 3.20GHz .85-1.3625V
Kingston KHX6400D2K2/4G 4GB (2 x 2GB) 240-Pin DDR2 SDRAM DDR2 800 memory: 5-5-5-15-?t nominal 1.85v:
a b } Memory
a c 177 V Motherboard
March 21, 2010 12:26:10 AM

Ah - sorry about the C2/C4 stuff - that appears in the BIOS (or not) depending upon what the individual CPU supports, and my normal CPU finder page at Intel:
http://processorfinder.intel.com/
has been 'dead in the water' most of the day - probably down for maintenance to add the new hexacore i7s/Xeons [:bilbat:5]

Always welcome - glad it's 'crankin' for ya! :hello: 
March 31, 2010 3:20:48 AM

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