P5B Deluxe timings 4-4-4 > 4-4-3 > 3-3-3 ?

[eva2000]

I just bought my first 965P chipset based board, Asus P5B Deluxe and playing around with E6600 B1 and 9x400fsb 1:1 boot from bios just to get a feel for the board.

I read that 4-4-4 is faster than 3-3-3 timings ????

I just tested 32M

400mhz 4-4-4-4 ~14min 39s untweaked and ~14min 32s memset tweaked
400mhz 4-4-3-4 ~14min 38s untweaked
400mhz 3-3-3-8 running right now but at half way mark is already 30 seconds slower than either 4-4-4-4 or 4-4-3-4 tests ????

I'm using 0804 bios.... anyone get to the bottom of this yet as to why 3-3-3-8 is so slow ?

thanks

[kiwi]

3-3-3 is slow for me too but 4-4-3 is better than 4-4-4. I am using 711 bios. Can you show your subtimings?

[eva2000]

Haven't uploaded all my results yet as still running 3-3-3-8 32M right now

but here's for 4-4-4-4 and 4-4-3-4 with untweaked OS and just bios set changes in timings NO memset changes at all



VS



looks like when i set tRP = 3, bios automatically changed All Precharge to Activate and All Precharge to Refresh delay from 4 to 3.

then tried 4-4-4-4 with memset tweak changed RAS to CAS Write delay from 4 to 2

[bachus_anonym]

Yep, welcome to the world of P5B Deluxe wackiness Useless of 3-3-3 is one of them I have done a little comparison somewhere a while ago - past "straight-booted" 400MHz FSB, 3-3-3 becomes faster than 4-4-4 but that's mainly due to chipset latencies being loosened up (or strap change, depending on who you ask ), which super-oddly does not affect 3-3-3 at all, only 4-4-4 or 4-3-4-4 or 4-4-3

http://www.xtremesystems.org/forums/...6&postcount=28

[Viss]

I thought ras to cas 3 is the problem. 3-4-3-4 is faster for me then 3-3-3-4 but about the same as 4-4-4-4

[Cappie]

Happens for me too, but found out that putting that one setting on 4 and rest to 3 fixed it indeed.

[eva2000]

thanks guys for the education! very weird stuff indeed

http://www.xtremesystems.org/forums/...6&postcount=28

knew I could count on you to have comparison results handy

so would the reverse be true ? if i was to set 3-3-3-8 in bios and boot at 401+ fsb, the use clockgen to downclock to 400fsb and I should get times faster than boot at 400fsb 3-3-3-8 ?

[pentium777]

Am testing now my new rig BFG 680i 2x8800 GTX now that RAM speeds can be set really high I'm wondering will I benefit more running my TWIN2X-6400C4 @ 4-4-4-12 @ 900? Or so far I have been able to get 5-5-5-15 2.2v @ 1090 maybe 1100 depending on room temp ambient.

Basically I'm looking for better overall gaming / performance on the system either way.

Thanks

[shimmishim]

i think if you boot at 401 then you're on the 1333/1600 strap.

if you boot at 400, you're on the 1066 strap.

my guess would be 400 clockgen'ed down from 401 would be slower than straight boot at 400.

i get this board soon as well (today or tomorrow).

[eva2000]

pentium777 only way to know is test it for yourself i

so far my tests concur with bachus and other folks findings

Bio Settings:

AI Tuning: Manual
CPU Frequency: 400
DRAM Frequency: DRR2-800Mhz
PCI Express Frequency: 100
PCI Clock Synchronization Mode: 33.33Mhz
Spread Spectrum: Disabled
Memory Voltage: 2.1v
CPU Vcore Voltage: 1.4375v (1.384v)
FSB Termination Voltage: AUTO
NB Vcore: AUTO
SB Vcore (SATA/PCIE): AUTO
ICH Chipset Voltage: AUTO

--------------------------------------------------
Straight boot from bios
@400mhz 4-4-4-4 2-20-3-9-7-9

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 4
DRAM RAS# to CAS# Delay: 4
DRAM RAS# Precharge: 4
DRAM RAS# Activate to Precharge: 4
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled



--------------------------------------------------
Straight boot from bios
+
Memset tweak change RAS TO CAS Write Delay from 4 to 2
@400mhz 4-4-4-4 2-20-3-9-7-9

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 4
DRAM RAS# to CAS# Delay: 4
DRAM RAS# Precharge: 4
DRAM RAS# Activate to Precharge: 4
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled



--------------------------------------------------
Straight boot from bios
@400mhz 4-4-3-4 2-20-3-9-7-9

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 4
DRAM RAS# to CAS# Delay: 4
DRAM RAS# Precharge: 3
DRAM RAS# Activate to Precharge: 4
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled




--------------------------------------------------
Straight boot from bios
@400mhz 3-3-3-8 6-42-10-10-10-10


Bio Settings:

AI Tuning: Manual
CPU Frequency: 400
DRAM Frequency: DRR2-800Mhz
PCI Express Frequency: 100
PCI Clock Synchronization Mode: 33.33Mhz
Spread Spectrum: Disabled
Memory Voltage: 2.25v
CPU Vcore Voltage: 1.4375v (1.384v)
FSB Termination Voltage: AUTO
NB Vcore: AUTO
SB Vcore (SATA/PCIE): AUTO
ICH Chipset Voltage: AUTO

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 3
DRAM RAS# to CAS# Delay: 3
DRAM RAS# Precharge: 3
DRAM RAS# Activate to Precharge: 8
DRAM Write Recovery Time: 6
DRAM TRFC: 42
DRAM TRRD: 10
Rank Write to Read Delay: 10
Read to Precharge Delay: 10
Write to Precharge Delay: 10
Static Read Control: Disabled



--------------------------------------------------
Straight boot from bios
@400mhz 3-3-3-8 2-20-3-9-7-9

Bio Settings:

AI Tuning: Manual
CPU Frequency: 400
DRAM Frequency: DRR2-800Mhz
PCI Express Frequency: 100
PCI Clock Synchronization Mode: 33.33Mhz
Spread Spectrum: Disabled
Memory Voltage: 2.25v
CPU Vcore Voltage: 1.4375v (1.384v)
FSB Termination Voltage: AUTO
NB Vcore: AUTO
SB Vcore (SATA/PCIE): AUTO
ICH Chipset Voltage: AUTO

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 3
DRAM RAS# to CAS# Delay: 3
DRAM RAS# Precharge: 3
DRAM RAS# Activate to Precharge: 8
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled



--------------------------------------------------
Straight boot from bios
@402mhz 3-3-3-8 2-20-3-9-7-9
+
Clockgen down to 400mhz 3-3-3-8

Bio Settings:

AI Tuning: Manual
CPU Frequency: 402
DRAM Frequency: DRR2-804Mhz
PCI Express Frequency: 100
PCI Clock Synchronization Mode: 33.33Mhz
Spread Spectrum: Disabled
Memory Voltage: 2.25v
CPU Vcore Voltage: 1.4375v (1.384v)
FSB Termination Voltage: AUTO
NB Vcore: AUTO
SB Vcore (SATA/PCIE): AUTO
ICH Chipset Voltage: AUTO

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 3
DRAM RAS# to CAS# Delay: 3
DRAM RAS# Precharge: 3
DRAM RAS# Activate to Precharge: 8
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled



--------------------------------------------------
Straight boot from bios
@400mhz 3-4-3-4 2-20-3-9-7-9

Bio Settings:

AI Tuning: Manual
CPU Frequency: 400
DRAM Frequency: DRR2-800Mhz
PCI Express Frequency: 100
PCI Clock Synchronization Mode: 33.33Mhz
Spread Spectrum: Disabled
Memory Voltage: 2.25v
CPU Vcore Voltage: 1.4375v (1.384v)
FSB Termination Voltage: AUTO
NB Vcore: AUTO
SB Vcore (SATA/PCIE): AUTO
ICH Chipset Voltage: AUTO

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 3
DRAM RAS# to CAS# Delay: 4
DRAM RAS# Precharge: 3
DRAM RAS# Activate to Precharge: 4
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled



--------------------------------------------------
Straight boot from bios
@400mhz 3-4-3-4 2-20-3-9-7-9
+
Memset tweak change RAS TO CAS Write Delay from 4 to 2

Bio Settings:

AI Tuning: Manual
CPU Frequency: 400
DRAM Frequency: DRR2-800Mhz
PCI Express Frequency: 100
PCI Clock Synchronization Mode: 33.33Mhz
Spread Spectrum: Disabled
Memory Voltage: 2.25v
CPU Vcore Voltage: 1.4375v (1.384v)
FSB Termination Voltage: AUTO
NB Vcore: AUTO
SB Vcore (SATA/PCIE): AUTO
ICH Chipset Voltage: AUTO

Memory Remap Feature: Disabled
Configure DRAM Timing by SPD: Disabled
DDRAM CAS# Latency: 3
DRAM RAS# to CAS# Delay: 4
DRAM RAS# Precharge: 3
DRAM RAS# Activate to Precharge: 4
DRAM Write Recovery Time: 2
DRAM TRFC: 20
DRAM TRRD: 3
Rank Write to Read Delay: 9
Read to Precharge Delay: 7
Write to Precharge Delay: 9
Static Read Control: Disabled



--------------------------------------------------
Really weird behaviour going on here! Seems below 400FSB 4-4-4 and 4-4-3 timings are faster than 3-3-3 and the culprit is tRCD value, but above 401FSB, tRCD 3 (i.e. 3-3-3) picks up performance like expected it seems if you read http://www.xtremesystems.org/forums/...6&postcount=28 and http://www.xtremesystems.org/forums/...d.php?t=123284

[shimmishim]

WHOA

interesting...

straight boot 400 vs. boot up at 402 and clockgen down is interesting indeed!

at cas 3 it's faster when you clockgen down. that is definitely a surprise!

thanks for the results.

[bachus_anonym]

Nice work

If you want to play more, boot @ 400 8-4-4-4.0 and run e.g. 32M. Then after it's done, use MemSet to "tighten" to 8-3-3-4.0 (or anything else with TRCD=3) and run 32M again... Watch how 32M result face-plants. I tried it few times and this what happened - i might have a screen somewhere... Funny, 3-3-3 slower than 4-4-4, eh That's pretty much the only beef I have with ASUS and this board...

Your example of boot @ 402 and down to 400 is quite interesting... I never tried that. Though, it's still slower than boot @ 400 4-4-4...

[thorgal]

Great job again, wow

Come to think of it, I'll have to be carefull to post results with cas 3 in my upcoming reviews...

[erwinz]

nice.. really thinking about geting this board..

[eva2000]

thanks guys

Nice work

If you want to play more, boot @ 400 8-4-4-4.0 and run e.g. 32M. Then after it's done, use MemSet to "tighten" to 8-3-3-4.0 (or anything else with TRCD=3) and run 32M again... Watch how 32M result face-plants. I tried it few times and this what happened - i might have a screen somewhere...

not sure i follow ? you mean setting timings using memset is slower than straight boot from bios set timings ?

[sskings]

i think if you boot at 401 then you're on the 1333/1600 strap.

if you boot at 400, you're on the 1066 strap.

my guess would be 400 clockgen'ed down from 401 would be slower than straight boot at 400.

i get this board soon as well (today or tomorrow).

Let us know if your chipset is c1 or c2. I've heard there differences with memory timings.

Thanks.

[IluvIntel]

Can someone please try 3-2-2-4 @ 400Mhz, probably only those with Vdimm mods or extremely nice DDR2 !
I know exactly what everyones talking about with P965 chipset & 32Mb SuperPi... and I thought my board or hardware combo was crap...

[Will Eatforfood]

I dont think trying those timings are necessary. 3-3-3-x didn't do so well so what would setting it tighter do? We will see the same trend.

[Smash]

Nice Tests

And what's when you boot from 400 or 402 and go then on overclocking? Are then the lower timings better?

[over@locker886]

Thank you great test eva!

[rjw]

good job

[deadlock7]

Actually ther best timings is 4-4-2 for 1066 strap.Even 3-2-2 is worst..

[Revv23]

man ram clocks so nice in the P5B it's too bad they don't give us proper control of the timings.

[eva2000]

Actually ther best timings is 4-4-2 for 1066 strap.Even 3-2-2 is worst..

interesting haven't tried 4-4-2 yet

[IluvIntel]

I dont think trying those timings are necessary. 3-3-3-x didn't do so well so what would setting it tighter do? We will see the same trend.

It could be logical to presume that, but it does'nt mean that will be the case. Has someone tried this yet ?