• We’re currently investigating an issue related to the forum theme and styling that is impacting page layout and visual formatting. The problem has been identified, and we are actively working on a resolution. There is no impact to user data or functionality, this is strictly a front-end display issue. We’ll post an update once the fix has been deployed. Thanks for your patience while we get this sorted.

Haswell Benchmarks?

Page 5 - Seeking answers? Join the AnandTech community: where nearly half-a-million members share solutions and discuss the latest tech.
piesquared said:
Piledriver has AVX, FMA4 and FMA3, it's instruction set is the most advanced of any x86 processor. Kaveri will have AVX2 and will hit the market at about the same time as anyone starts using AVX2, so no advantage there for haswell there either.
Click to expand...

Source on AVX2 in Kaveri?
 
piesquared said:
Piledriver has AVX, FMA4 and FMA3, it's instruction set is the most advanced of any x86 processor. Kaveri will have AVX2 and will hit the market at about the same time as anyone starts using AVX2, so no advantage there for haswell there either.
Click to expand...

There will be an advantage for Haswell.

It's called just being plain better in every single way.:whiste:
 
I'm led to believe this is a neutral thread about benchmarks of one particular processor. Please do not derail this into another AMD vs. Intel thread.

And please, personal attacks (e.g., "Amd fanboy") are unwelcome in this forum.

 
Last edited:
To get this sort of back to topic, any educated guesses at how much power VRMs consume on a desktop board and how much can be saved by integrating them?
 
Piroko said:
To get this sort of back to topic, any educated guesses at how much power VRMs consume on a desktop board and how much can be saved by integrating them?
Click to expand...

Well depends on configuration. Here is an example:
irefficiencympka.jpg



coarse.jpg

fine.jpg


So there is alot to be saved. Plus all the other benefits and quality assurance.
 
Last edited:
Well yea that's the theory behind it, but what could one reasonably expect in practice? Just looking at the slides I'd expect savings mainly with light workloads (websurfing workload), but low gains at full load and full idle (workstation, gaming / always-on). Am I correct?
 
Piroko said:
Well yea that's the theory behind it, but what could one reasonably expect in practice? Just looking at the slides I'd expect savings mainly with light workloads (websurfing workload), but low gains at full load and full idle (workstation, gaming / always-on). Am I correct?
Click to expand...
Full load can be pretty high. It depends largely on what board you use today. But 30-40W savings isnt impossible. On the other hand it would also be 10-15W in the lower range.

Idle is anything from a few W to as much as 20W.

Again, mileage will vary alot between different boards.
 
I don't think 30-40W savings on a 85W desktop processor are realistic when the efficiency of all the measured vrms is between 81% and 89% @~70A load in your own graph. Even 5W would be a feat imho. As I understood, power savings are expected when the processor shifts between power states a lot, but I'm curious how much Intel engineers or knowledgeable people would expect.
 
As well as possible efficiency gains through different transistors compared to IB, yes, but those are factors which we can only speculate about whereas compact dc/dc power delivery kinda is a hot topic for small devices and more people might have knowledge in that field...
 
Piroko said:
I don't think 30-40W savings on a 85W desktop processor are realistic when the efficiency of all the measured vrms is between 81% and 89% @~70A load in your own graph. Even 5W would be a feat imho. As I understood, power savings are expected when the processor shifts between power states a lot, but I'm curious how much Intel engineers or knowledgeable people would expect.
Click to expand...

http://www.techpowerup.com/reviews/Gigabyte/X79-UD5/8.html

Well, think twice then.

Not to mention raw mobo vs mobo:
http://www.anandtech.com/show/6144/asus-p8z77v-premium-review-a-bentley-among-motherboards/6
 
Last edited:
I would've liked to see the differences on the same board with different vrms (different production charges maybe) but that's probably asking too much. The Techpowerup article states "may not prove to isolate the CPU power draw in all instances", measures with 130W processors and that a bios update of the Gigabyte board pushes power consumption by 26W at load. So there's definitely a software part in the difference which also is exaggerated because of the different peak power draw.

Still, point taken, Haswell might lower power consumption on 'shoddy' boards by quite a bit more.
 
You must log in or register to reply here.

TRENDING THREADS

Back
Top