[MemoryReaction] G.Skill F2-8000CL5D-4GBPQ - Low in cost, high in speed!

[tomb18]

I was wondering if someone could help me understand what I am seeing with this memory on a 780i plateform with a QX6700.
I have this memory running stable at 1000 MHz 5-5-5-15 in an 8G configuration.

At an FSB of 1333 to 1500 Memory reads in everest are from 9400-9800 MB/s and writes are down around 6500 MB/s. Latency is around 54ns.

The moment the fsb goes higher (1550 -1800), the memeory read speed drops down to 8000 MB/s, write speed goes up to 7500 MB/s and latency raises to 74ns. It doesn't matter whether I am linked, synced, or unsynced or what the MHZ is for the ram.

What I don't really understand is why the memory performance for writes goes up while reads go down.
Can anyone shed some light?
Thanks

[Cronos]

Well I did a quick set of 20 and the residual norm values give two sets of different numbers, half are identicle and the other half are identicle. Should all of the residuals be the same?

Interesting, never saw this before, can you post the output file result in Linpack thread, i'd like to see it.

[tomb18]

Interesting, never saw this before, can you post the output file result in Linpack thread, i'd like to see it.

I was looking for the thread yesterday...Can you please tell me where it is?
Thanks

[Cronos]

I was looking for the thread yesterday...Can you please tell me where it is?
Thanks

http://www.xtremesystems.org/forums/...d.php?t=175729

[Arlos]

Hey guys,

Thanks for all the info posted in this thread, lots pf good info here.
I'm using this RAm with a GA-X38-DQ6 and Q600. I can't seem to get them stable with an hour test on OCCT. Has this been an issue for anyone else and should I just use prime 95 for stability testing? My CPU seems rock solid with Prime 95 small FFT's for 10 hours. Whats the best way to go from here? And is it worth getting rid of these for the PC2-8500 2 x 2 GB?

Thanks for the help

Any advice here?

[Cronos]

Any advice here?

Forget OCCT, it's memory test is buggy.

[Arlos]

Great,

Thanks for the reply, so its safe to say that the RAM is stable after 10 hours of 4 x Prime95? How bout Orthos? Or is there other programs that I should be looking at?

Thanks again

[Cronos]

Great,

Thanks for the reply, so its safe to say that the RAM is stable after 10 hours of 4 x Prime95? How bout Orthos? Or is there other programs that I should be looking at?

Thanks again

It's not safe after any particular test program

Try Memtest86+ , LInpack 64bit.

[Crazy Chuckster]

Well I pulled the trigger on this memory. It will be here tomorrow and will be going in the rig in my sig.

I will post results.

[EnJoY]

Well I pulled the trigger on this memory. It will be here tomorrow and will be going in the rig in my sig.

I will post results.

Should have good results as long as the sticks are decent.

[iadstudio]

Should have good results as long as the sticks are decent.

Are you saying there are revisions that do not do as well? I'm moving away from a Crucial 4gb setup since the IC's they use now are inferior and one set already failed on me at 1100mhz 2.2v.

Is it safe to assume a set of these will do 1100mhz? or is it worth it to get the 8500 G.skills?

[EnJoY]

Are you saying there are revisions that do not do as well? I'm moving away from a Crucial 4gb setup since the IC's they use now are inferior and one set already failed on me at 1100mhz 2.2v.

Is it safe to assume a set of these will do 1100mhz? or is it worth it to get the 8500 G.skills?

I'm not saying that at all. I am simply stating what should be obvious to most overclockers anyway; not every IC is created equally. Some will clock well, while others just won't.

[theonlybabyface]

For anyone using this memory on a Maximus Formula...these settings are spot on for 1066:

Extreme Tweaker

Ai Overclock Tuner : Manual
OC From CPU Level Up : AUTO
CPU Ratio Control : Manual
- Ratio CMOS Setting : 9
FSB Frequency : 400
FSB Strap to North Bridge : 400
PCI-E Frequency: 100
DRAM Frequency: DDR2- 1066
DRAM Command Rate : 2T
DRAM Timing Control: Manual
CAS# Latency : 5
RAS# to CAS# Delay : 5
RAS# Precharge : 5
RAS# ActivateTime : 15
RAS# to RAS# Delay : AUTO
Row Refresh Cycle Time : AUTO
Write Recovery Time : AUTO
Read to Precharge Time : AUTO

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
DRAM Static Read Control: AUTO
Ai Clock Twister : AUTO
Transaction Booster : AUTO

CPU Voltage : 1.4375
CPU PLL Voltage : 1.50
North Bridge Voltage : 1.49
DRAM Voltage : 1.92
FSB Termination Voltage : 1.40
South Bridge Voltage : 1.050
Loadline Calibration : ENABLED
CPU GTL Reference : AUTO
North Bridge GTL Reference : AUTO
DDR2 Channel A REF Voltage : AUTO
DDR2 Channel B REF Voltage : AUTO
DDR2 Controller REF Voltage : AUTO
SB 1.5V Voltage : 1.5

NB LED Selection : NB Volt
SB LED Selection : SB Volt
CPU LED Selection : CPU VOlt
Voltiminder LED :

CPU Spread Spectrum : Disabled
PCIE Spread Spectrum : Disabled

Advanced CPU Configuration
CPU Ratio Control : Manual
- Ratio CMOS Setting : 9
C1E Suppport : Disabled
CPU TM Function : Disabled
Vanderpool Technology : Disabled
Execute Disable Bit : Disabled
Max CPUID Value Limit : Disabled


USB Configuration
USB Functions: Enabled
Legacy USB Support : Disabled

[EnJoY]

LOL.....AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO...*repeat*

[theonlybabyface]

LOL.....AUTO AUTO AUTO AUTO AUTO AUTO AUTO AUTO...*repeat*

No BS that way...works perfectly.

[flesheatinvirus]

I run mine setup in manual on an Asus P5K Prem and they crank, can do 600 4-4-4-19 at 2.4. Best Mem I have tested in a while even surpassing my Team Xtreme and much cheaper.

[EnJoY]

I run mine setup in manual on an Asus P5K Prem and they crank, can do 600 4-4-4-19 at 2.4. Best Mem I have tested in a while even surpassing my Team Xtreme and much cheaper.

You can run 4-4-4 timings w/ 2.4v at 1200MHz? Screenshot?

[Praz]

You can run 4-4-4 timings w/ 2.4v at 1200MHz? Screenshot?

What EnJoy said.

[GSKILL TECH]

No BS that way...works perfectly.

that is what i keep telling people use Asus Maximus Formula... 5-5-5-15 and auto for all other timing

[Leeghoofd]

I run mine setup in manual on an Asus P5K Prem and they crank, can do 600 4-4-4-19 at 2.4. Best Mem I have tested in a while even surpassing my Team Xtreme and much cheaper.

You mean 2 gig PC 8000HZ 4-4-4-5 ram maybe ?

[Crazy Chuckster]

Should have good results as long as the sticks are decent.

Well right now im running my fsb @ 400 with the ram in 1:1

I may try to go as high as 425 or 450 but either way the memory should stay under the rated 1000mhz spec so it should do just fine for my needs.

Wow I checked the Egg this morning and the memory is down to 109.99 as if it wasnt a good enough deal already!

[tomb18]

I noticed in the bios of the 780i board, this memory is displayed as SLI ready.
I have not used this type of memory before and it is disabled for me and I have set the speed manually.
Is there any advantage to enabling SLI mode and then setting the speed?
Thanks

[Crazy Chuckster]

Ok got em up and running. I left my current OC of 3.6ghz but bumped the mem up to 480mhz. Left the timings loose at 5-5-5-15

Gonna fire up orthose for a few hours and see how it goes.

[EnJoY]

Ok got em up and running. I left my current OC of 3.6ghz but bumped the mem up to 480mhz. Left the timings loose at 5-5-5-15

Gonna fire up orthose for a few hours and see how it goes.

Subtimings?

[Crazy Chuckster]

All on Auto.... should I mess with them or leave them be? Its running perfectly so would I gian anything by changing the sub timings?