New DC Computer - 4770K

[GLeeM]

4770K
Asus Z87-Pro mobo
8GB DDR3-1866
Noctua NH-U14S heatsink w/IC Diamond
EVGA 780 SC

Replaces the Core2Duo

It is not as easy to overclock as the i7 920 was! Or I guess I just have to accept that it will only go to 4.2 with vcore of 1.27. The core temps are only ~74C running Astroids@home.
I was up over 1.30 vcore trying to get 4.3 stable, no luck even though temps were under 80C. Anyone know if it is safe to go higher on the vcore?
I was really hoping for a 4.4 or higher chip.

One really odd thing: when I run Seti on the iGPU it lowers the CPU temps about 7 degrees! Doesn't make sense Collatz keeps the same temps. I thought the temps would go up a lot when using the gpu on the CPU.
I'm not sure how I will use the iGPU. It did 90 points on a 6,000 second Seti WU (2600 ppd). And 45,000 ppd in Collatz. Haven't tried Einstein on it yet. Might be best just to run the desktop on it.

 

[biodoc]

Very nice build GLeeM. :thumbsup:

Can't help you with built in GPU. I'm not sure if any of my chips have a built in GPU!

Have fun!

 

[Assimilator1]

Nice rig

That's just bizarre regarding SETI on iGPU, is it stalling one of the CPU cores? If your running A@H on the CPU & if SETI on the iGPU is taking a lot of CPU cycles from a core then I could see that lowering CPU temps.

Afraid I know very little about Haswell overclocking, maybe this site can help? http://www.techpowerup.com/reviews/Intel/Haswell_OC_Guide/1.html
And this thread http://forums.anandtech.com/showthread.php?t=2326066

 

[GLeeM]

That's just bizarre regarding SETI on iGPU, is it stalling one of the CPU cores? If your running A@H on the CPU & if SETI on the iGPU is taking a lot of CPU cycles from a core then I could see that lowering CPU temps.

Yeah, that's what I was thinking. But. no, Seti is using very little CPU.
Collatz uses almost a full CPU, but keeps the temps at 74C.
Thanks for the links, I will read them

At 4.2 it is finishing A@H WU in ~7,000 seconds
My old i7 920 at 4.0 finishes in ~10,500

 

[biodoc]

GLeeM, check out this thread at asteroids:

http://asteroidsathome.net/boinc/forum_thread.php?id=200#1826

Haswell chips should run much faster on asteroids. Do you know if your rig is using the avx or sse3 app?

 

[Assimilator1]

Yea my C2Q is doing the bulk of WUs in 7100-8000s, http://asteroidsathome.net/boinc/results.php?userid=30920&offset=0&show_names=0&state=4&appid=
I would think your i7 would be much quicker too

 

[GLeeM]

Do you know if your rig is using the avx or sse3 app?

Thanks biodoc
It had been running SSE2.
I got it to run some AVX WUs, the temps were a little higher ~79C.
It BSODed at 95% done after 1:15 so it would have been much faster!
So they did finish in like 1:20 which gives ~70,000 ppd

I would think your i7 would be much quicker too

The 6,000 seconds was on the iGPU!

 

[Assimilator1]

The iGPU does pretty well then! but I was referring to the i7 920. I would of thought an i7 920 @4GHz would spank my C2Q @3.6 GHz! lol.

At least your 4770k's giving good times now .

 

[GLeeM]

I would of thought an i7 920 @4GHz would spank my C2Q @3.6 GHz!

LOL, yeah it should The Q9550 is still a good DC processor!
But the i7 has HT so runs 8 to your 4. So i7 would give 31,600 ppd vs. Q9550's 23,300 ppd.

Thanks for bringing it up, I wonder how the 4770K would overclock with HT turned off. If it OCed much better, that might be enough to do better than HT improvement. Which would mean that maybe the cheaper i5 would be the better DC processor?
If/when it BSODs I should try it

 

[GLeeM]

With the next PrimeGrid race only six days away I figured I better try running a few Proth Prime Search (LLR) WUs. Guess what - they use AVX! They raised the temps to lower 80s with max of 86 86 86 79 Good news they only took at most 40 minutes with seven validated and no errors/invalids yet
This afternoon I will turn off HT to try for a better OC and see how much better the PPS (LLR) WUs run.

 

[Assimilator1]

Ah yea HT will give better performance (presumably) & explain the higher WU time.
Have you seen what the output is with HT off?

CPU getting toasty with PPS!
Let us know how the overclocking goes :thumbsup:

 

[GLeeM]

HT off, it only went to 4300 OC.

PPS (LLR) finished in 20 minutes vs. ~38 minutes w/HT @ 4200 OC

Results in A@H:
47 minutes no HT @ 4300
80 minutes w/HT @ 4200

So it looks like HT helps quite a bit :thumbsup:

But the biggest kicker is the GPU cards need a core. An HT core will do it, so I can run seven WUs vs. three WUs with HT off and watching Task Manager showing 76-77% usage

 

[zzuupp]

...
But the biggest kicker is the GPU cards need a core. An HT core will do it, ...:

Yup, In my mind that's the biggest HT benefit. Some GPU apps hog a CPU core, they don't know that it's virtual.

Congrats on the new toy! :awe:

 

[Assimilator1]

For a few days I was regularly monitoring GPU load(utilisation) whilst I had all 4 cores crunching & I found that sometimes MW would carry on crunching at 90-95% load, other times 60-70% & sometimes it would drop as low as 40-50%!
Couldn't really see a pattern to it, I did notice it was more likely to have a low GPU load when running MW v1.02 WUs (which also draw more power & run the card hotter even when GPU load is the same), but not always!
Didn't seem to matter whether LHC or A@H was running on the CPU.