Windows 7 64bit and reserved ram

brenton

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Jan 17, 2012
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Hey guys, im very new to the site but ive used this site in the past for solving other pc problems ive had. i can't seem to find the answer for this one but.

Ok, recently i upgraded from 4gb to 6gb of ram there the same speed voltages infact they are the same brand and model. my problem is my bios only show 4gb memtest shows 4gb but all the windows utilities show 6gb but 2 gb is reserved for hardware (graphics card im guessing). do any of you know the fix for this as ive never had ram reserved before i upgraded. my ram is 2gbx3 corsair DDR2 Xms my mobo is a Gigabyte EP41-UD3L my gpu is evga gtx480.

list of things ive tired.
update bios
set max ram in msconfig
reseat cpu and ram
swap ram around in the sockets
memtest

im really lost is anyone has any feedback that would be great.
 

digitalzom-b

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Dec 2, 2011
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Hm, is your onboard video still enabled?

Also... you are now no longer running your memory in dual-channel mode. This is NOT ideal, as dual channel mode will increase performance... you would want another stick of memory to fill all slots.
 

brenton

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Jan 17, 2012
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ive got 8gb but my system wont post with 8 in, i couldnt solve that problems so i took some ram out. what happens is i get the bios beep saying memory error or when windows starts to load it crashes
 

brenton

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Jan 17, 2012
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well it doesnt post with timings change, its all Corsiar 2gb sticks 4 of them. so i dont see how it could be mismatched ram. faulty ram may be the problem but i hope not cause i just brought it.
 
TWIN2X4096-6400C5C ; 1st post my ram is 2gbx3 corsair DDR2 Xms
DDR2-800 5-5-5-18 @ 1.80v

Gigabyte EP41-UD3L - http://www.gigabyte.com/products/product-page.aspx?pid=3454#dl

Installed:
CPU: | Set 1 | Set 2 | Set 1 | Set 2 | ; regardless

BIOS:
Load Optimized (F7)
System Memory Multiplier -> 3 ; if CPU Host Frequency = 266MHz otherwise {800 / CPU Host Frequency}
DRAM Timing Selectable -> Manual
CAS Latency Time -> 5 ; 6 if failure
tRCD -> 5 ; 6 if failure
tRP -> 5 ; 6 if failure
tRAS -> 18

DRAM Voltage -> 1.85v~1.90v ; +0.05v~+0.10v with all DIMM slots populated

Save and Exit = Yes
 
Just noted something very weird on page 16 of your manual. If you have ALL (4) DIMM slots filled then ONLY (SS) Single Sided RAM works!

(DS) Double Sided is limited to (2) DIMM Slots. Pretty sure the Corsair is (DS) RAM.

Pull one of the sticks and look if it has chips on one or both sides...