Higher Frequency or looser timings on Kingston HyperX T1 DDR3 1600 (PC3 12800)

[c627627]

It's a 1.65V kit, 2 x 4GB Kingston HyperX T1 DDR3 1600 (PC3 12800) stable on a 24/7 main rig at
[DDR3-1651MHz] 9-9-9-27 @ 1.64 DRAM Bus Voltage

Stay there or go to [DDR3-2065MHz] but at how high timings would the gains be negated?


So if I did 10-10-10-24 for example at 2065 MHz, would that be better than 1651 MHZ at 9-9-9-27?


_____________________
Intel i7 950 [206] BCLK x 20 = 4.12 GHz @ [1.4000] CPU Voltage & [1.35000] QPI/DRAM Uncore Voltage, Batch 3029A40
2 x 4GB Kingston HyperX T1 DDR3 1600 (PC3 12800) [DDR3-1651MHz] 9-9-9-27 @ 1.64 DRAM Bus Voltage
ASUS P6T Deluxe v.1 [LGA 1366 Intel X58] BIOS 2209
Thermalright Ultra-120 eXtreme 1366 RT with 120mm Scythe S-Flex F fan
nVidia GeForce GTX 560 Ti PNY XLR8 1GB GDDR5 822MHz Core Clock
ASUS ATI Radeon HD 5450 [used for HDMI HD sound only]
OCZ Agility3 180GB SSD SATA III
Asus Xonar DX sound card
Antec nine hundred case, two front 120mm fans, one back 120mm Fan, one top 200mm fan
Corsair CMPSU-750TX 750W

 

[Janus67]

The faster speed will likely be faster. you can use MaxxMem to see the bandwidth gains/losses between the two. It's possible that there is a sweet spot between that may be better for you.

I know there is some quick math that you can do (something like dividing the speed by the 4 timings added together - I can't remember).

 

[c627627]

...you can use MaxxMem to see the bandwidth gains/losses between the two.

Well great, where is the official web site for MaxxMem, can't do better than simply comparing two numbers, right?

 

[c627627]

What is the latest version MaxxMEM2 1.98 or 1.99 and who has it?

 

[Metlcub]

My mem is running a 1600 at 8/8/8/24, i could go to 1866 9/9/9/27 the speed is faster but the overall the 1600 is faster in my set up.

 

[c627627]

Yes, I could leave it at 1651MHz and then see if even tighter timings would do, thanks for reminding me of that third option.

Going from 1651 Mhz to 2065 Mhz would not even boot at 1.76V at 10-10-10-24. How high voltage for 24/7 rig is OK with you by the way on this 1.65V Kit [2 x 4GB Kingston HyperX T1 DDR3 1600 (PC3 12800)] ?

 

[c627627]

Since the RAM would not boot at 2065MHz at 10-10-10-24 at 1.76V
but is passing Memtest at
1651MHz at 8-8-8-24 at 1.68 V

I am inclined to just leave it there for my main rig. But out of curiosity at what timings would you test it next? 7-7-7-24?

 

[Woomack]

For these speeds it's generally tRAS = CL+tRCD+tRP or -1 so 8-8-8-24 , 7-7-7-20 etc ... but not all chips like low tRAS.
Try something like 7-8-7-24 and next 6-8-6-24.
Also you can try something like 2000 9-11-9-27 2T or 9-11-10-28 2T.
In this case ~1600 clock and tighter timings will probably give better effects as triple channel memory already have high base bandwith but lose some on access time.

Maxxmem 1.99 should be latest but main download site is usually down. Results from all 1.95+ versions are the same for me ( maybe even earlier but I didn't compare them ).

 

[c627627]

Where is the most reliable place to download v1.99 from?

Since 2065MHz at 10-10-10-24 at 1.76V failed to boot, I am abandoning 2000+MHz.
I tried your advice at 7-8-7-24 at 1.75 V and it failed to boot.


I am staying with 1651MHz at 8-8-8-24 at 1.68 V, it passed over 20 minutes of Memtest. I thought I would run it overnight and this would be where I would have this kit stay.

 

[hokiealumnus]

This is where HWBot links from its page: http://www.maxxpi.net/modules/download_gallery/dlc.php?file=15

I'd be quite happy with 1651 / 8-8-8-24 at only 1.68V though.

 

[c627627]

Will leave it at that if it passes Memtest overnight. It would be interesting if it stays there whereas it will not even boot if I move it slightly up either way...


Now tell me if I should have gone with http://www.newegg.com/Product/Product.aspx?Item=N82E16820147096


Everyone else told me to go for the Kingston at $35. MIAHALLEN thought maybe the Samsung would have had more head room but at what voltage would that headroom have come ... I wanted this for my main rig, not benching...

 

[hokiealumnus]

They would probably have had more frequency headroom, but timings would have been similar for the voltage. Samsung can clock high but it takes higher timings to get there. Lower-binned Hynix can run lower timings (if these are Hynix...I have no idea what they are) but don't like the MHz as much.

 

[c627627]

Well once again, thank you kindly for your advice, I think I got lucky to get that kit on its one day sale for $35.

 

[hokiealumnus]

Wow, indeed you did; that's a great price!

 

[c627627]

I also just measured more than 3 times better results with OCZ Agility 3 180GB SSD vs. old OCZ Agility 1 60GB SSD on exact same partition image and system.





_____________________
Intel i7 950 [206] BCLK x 20 = 4.12 GHz @ [1.4000] CPU Voltage & [1.35000] QPI/DRAM Uncore Voltage, Batch 3029A40
2 x 4GB Kingston HyperX T1 DDR3 1600 (PC3 12800) [DDR3-1651MHz] 8-8-8-24 @ 1.68 DRAM Bus Voltage
ASUS P6T Deluxe v.1 [LGA 1366 Intel X58] BIOS 2209
Thermalright Ultra-120 eXtreme 1366 RT with 120mm Scythe S-Flex F fan
nVidia GeForce GTX 560 Ti PNY XLR8 1GB GDDR5 822MHz Core Clock
ASUS ATI Radeon HD 5450 [used for HDMI HD sound only]
OCZ Agility 3 180GB SSD
Asus Xonar DX sound card
Antec nine hundred case, two front 120mm fans, one back 120mm Fan, one top 200mm fan
Corsair CMPSU-750TX 750W