i7 920 - HT or not to HT?

[Gilesc]

I'm getting a i7 920 system in the next week or so.

Would you recommend that I enable HT?

I will probably use the system for Video Transcoding, Gaming, and some developement work, including running multiple VMs, but I doubt that I would run more than say 4 VMs at the same time and I doubt I will be gaming, transcoding and using VMs simultaneously either.

What performance hit can I expect by turning on hyper-threading on each of the cores?

 

[jak731]

Without HT you might as well have a Q6600, definitely have it on.

 

[Helios1234]

Without HT you might as well have a Q6600, definitely have it on.

Or an i5 750

 

[JonJ678]

If you can keep it cold, you definitely want HT on. It makes an enormous difference in programs which can use that many cores, folding at home, virtual machines and video encoding all love it. Run four VMs each with two cores. The system is considerably quicker with it enabled.

In single/dual threaded application you'll see no difference, except it'll run hotter, and this may limit the overclock you can reach.

 

[Nocky24]

Yeh just leave HT on, its one of the main reasons in going i7. As others have said you might as well go i5 otherwise.

 

[OCP]

Defo leave HT on, I noticed the difference turning it on and off.

 

[dmxdex2020]

I dont use any encoding apps, all i have is AVG and few windows processor running in the background. I mainly only game should i turn HT off?

 

[Jonnygrunge]

I'm getting a i7 920 system in the next week or so.

Would you recommend that I enable HT?

I will probably use the system for Video Transcoding, Gaming, and some developement work, including running multiple VMs, but I doubt that I would run more than say 4 VMs at the same time and I doubt I will be gaming, transcoding and using VMs simultaneously either.

What performance hit can I expect by turning on hyper-threading on each of the cores?

Get a megahalems cooler for it Got one with two apaches in push pull, running my i7 with HT on @ 4GHz (1.25V) Idles 38oC all cores and maxes out at around 72oC great cooler! Not a lot of games are utalising HT at the moment, some games may even take a slight performance hit, but for video transcoding, etc it does make a difference! Software will eventually catch up so I would leave it on, turning it off equates to around 8oC in my experience. Great CPU, great choice, get a decent mobo, RAM and watch it fly!
Jonnygrunge.

 

[capriboy1978]

I'm setting two profiles up - first HT off oc to ~4.2 for gaming and cool runing and second ht on oc to ~ 3.8 for encoding / editing work.

 

[Jonnygrunge]

I'm setting two profiles up - first HT off oc to ~4.2 for gaming and cool runing and second ht on oc to ~ 3.8 for encoding / editing work.

Never seen any game push any of my cores above 58oC according to real temp!