It looks like your 780 Ti's PPD number is about 10 - 20% lower than it should be.
Maybe you should give a try to Linux, a 780 Ti at default clock is known to capable of producing as high as ~200k PPD on P8900 under Linux, with the 331.20 driver.
Does anyone notice that 780 Ti has been released for more than two weeks, but the official linux driver for 780 Ti is not released till now? :confused:
Go to http://www.geforce.com/drivers, Manual Driver Search, select Geforce GTX 780 Ti and Linux 64-bit and submit. The result is:
The answer might be 'No'. In the release notes of Intel S2600 series boards it said:
However, most IVB ES chips available at the moment are of B1/B2 stepping.
It's strange that the all-core clock is only 2.1GHz. One of my friends also has a pair of QDUDs, but the all-core clock is 2.4GHz and CPU-z can see all 12 cores. He is using a supermicro X9DAi board (with R3.0 BIOS).
I did some tests about mixing of E5-2600 v1 and E5-4600 v1 processors on a 4p board (Supermicro X9QR7) several months ago. It's found any 2p configuration combinations would work fine (incuding 2600 x2, 4600 x2, and 2600 x1 + 4600 x1). 3p or 4p configurations only involving 4600s also works...
I think it's impossible to let 26xx chips work in a 4p mode, only 46xx chips could do that.
However, it's not easy to judge whether a given ES Ivy-B chip belongs to the 46xx series or not. The only tool I found can do it 100% correctly is hwinfo64.The Ivy-B 46xx's codename reported in hwinfo64...
Intel hasn't release the E5-4600 v2 series yet. However, you can find some leaked models of E5-4600 v2 on wikipedia:
The above ES chips (QE3G, QDDM) are best matched to Xeon E5-4657L v2, I think.
In my estimation, the maximum...
Hi -alias-. I think this chip is not what you need. Accroding to the hwinfo64 & cpu-z snapshot, the link you provided is referring to a 2p chip, which is not 4p compatible at all.
You should look into this one instead...
Hello Nexvid, the price of the chips is another question. :)
The main purpose of this thread is to confirm if QD77/QE83 is really unlocked and supporting 2P. So we can wait for 8C and 12C unlocked chips if that is the truth, which would be very powerful.
Here is a hwinfo64 & cpu-z snapshot for the suspicious chip:
It shows that the QDF code is QD77/QE83, with a max turbo multiplier of 57x (!), and the codename is Ivy Bridge-EP (-EP means this is a 2p...
I think this is ONLY true for E5 v1. :)
As for E5 v2, the defination of stepping is different, (as far as I see) B1/B2 stepping is nearly bug free and is supported to work in 2p mode (at least on supermicro 2p boards).
Yes, B0 stepping SB-E (E5 v1) is not supported by many boards any longer with latest BIOS.
But for the IVB-E (E5 v2), as for as I see, B1 chips (stepping=2) are well supported by X9DAi with BIOS Rev 3.0.
Supermicro X9DAi supports 26xx v2 with the latest BIOS. A single 2680 v2 is fast enough for doing BA, and only 4 memory sticks are needed for single CPU configurations.
It's should be noted that some PCI-e slots would be unavailable with single CPU configurations on some 2p boards. On...
I hear a rumor that E5 v2 is better than E5 v1 on overclocking (by adjusting BCLK), it's said that 10% or even 12% overclocking is possile for E5 v2, while for E5 v1 it's only 8% at most.
Looking forward to your overclocking results.
I noticed that you got pretty good performances on 8104, however, the performance you got on 8101 is not as good as that on 8104 -- even 11m8s is not a very ideal result.
There are some PPD results for a 2p IV-B E5 (24C, 2.4G all-core, 1333 ecc ram) in...
Very impressing. Let's do a simple math. The 2697v2's allcore turbo is 3.0GHz, while 2687w's is 3.4GHz, and with 4% overclocking it becomes 3.536GHz.
That is to say, there is a ~10% performance...
Today I found a hwinfo64 & CPU-z's snapshot for IVB Xeon E5-4650 v2 (ES).
It's 12C 24T, B1 stepping, only 120W TDP, and the all-core turbo is 2.7GHz.
The PPD of a 4P rig armed with this model of CPU is estimated to be about 1500000! I think this would be wonderful. :cool...
Agreed. Generally speaking, B0 chips are not too bad, provided that you find the right board & BIOS. As for B1/B2 chips, most of them couldn't boot on any dual-socket board so they are more useless for FAH. However, if you only want to play with single-socket X79 boards, B1/B2 chips would also...
Hi, I found some FAH benchmark results for Xeon E5-2600 v2. I think it's not bad at all:
P8101: avg TPF=13m40s, PPD=344k
P8102: avg TPF=10m38s, PPD=501k
P8105: avg TPF=10m44s, PPD=482k
CPU is Xeon E5-2600 v2 2.0GHz 12c24t x2 (allcore turbo 2.4GHz), with SM X9DAi board and 4G DDR3 1333...