The Sandy Bridge Review: Intel Core i7-2600K, i5-2500K and Core i3-2100 Tested
by Anand Lal Shimpi on January 3, 2011 12:01 AM ESTPower Consumption
Power consumption is very low thanks to core power gating and Intel's 32nm process. Also, when the integrated GPU is not in use it is completely power gated as to not waste any power either. The end result is lower power consumption than virtually any other platform out there under load.
I also measured power at the ATX12V connector to give you an idea of what actual CPU power consumption is like (excluding the motherboard, PSU loss, etc...):
| Processor | Idle | Load (Cinebench R11.5) |
| Intel Core i7 2600K @ 4.4GHz | 5W | 111W |
| Intel Core i7 2600K (3.4GHz) | 5W | 86W |
| AMD Phenom II X4 975 BE (3.6GHz) | 14W | 96W |
| AMD Phenom II X6 1100T (3.3GHz) | 20W | 109W |
| Intel Core i5 661 (3.33GHz) | 4W | 33W |
| Intel Core i7 880 (3.06GHz) | 3W | 106W |
Idle power is a strength of Intel's as the cores are fully power gated when idle resulting in these great single digit power levels. Under load, there's actually not too much difference between an i7 2600K and a 3.6GHz Phenom II (only 10W). There's obviously a big difference in performance however (7.45 vs. 4.23 for the Phenom II in Cinebench R11.5), thus giving Intel better performance per watt. The fact that AMD is able to add two more cores at only a 13W load and 300MHz frequency penalty is pretty impressive as well.
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Didn't turn out well did it?BSMonitor - Tuesday, January 4, 2011 - link
You'd spend $80 on a 6-core MB ?? LOLIf you buy a 6-core Phenom, likely you'll be in th 140-180 range for a decent MB..
Funny how the cheapers rationalize their cheapness.
zipzoomflyhigh - Tuesday, January 4, 2011 - link
That's not true at all. Most $40-50 AM3 mobo's support X6. If you don't game or overclock, you don't need extra pci-e lanes and extra cooling. Especially for a workstation.Oxford Guy - Monday, January 3, 2011 - link
Yeah, I'm stoked about the new low-level DRM.This is sure to run it fast.
talevski - Thursday, January 6, 2011 - link
i think that amd 880g mainbord with cpu araound 90 dolars plus some 55xx series gpu can do better in terms of encoding decoding video playback games etc. and all that without alot of money spend on inetl new socekets wich you have to trow away when they make the next cpu.So please corect me if i am wrongto anandtech&co
pshen7 - Tuesday, February 22, 2011 - link
The charts and the numbers say it all. This is definitely worth an upgrade for me!Peter Shen, founder Koowie.com
Shifu_V - Saturday, April 16, 2011 - link
Hi everyone, i dicided to build a PC but made an 1 error getting the i7 2600 if anyone is interested in buying one please let me, it's brand new sealed in it original contents.and i dont mind trading it in for a i7 2600k.
and i will match the price maybe even better
My email:vinay_chauhan20042000@yahoo.co.uk
Skott - Monday, January 3, 2011 - link
I'm wondering how supply will be on release day? Often we see new components with low supply and online stores start price gouging from day one. New Egg is particularly known for such. Lets hope supply is very good off the bat. That 2600K looks really appealing to me.evilspoons - Monday, January 3, 2011 - link
One of the local computer stores had Sandy Bridge parts up for sale last week, but they're all gone now save for a few Asus P8P67 standard, pro, and deluxe boards.I wasn't able to see what kind of money they were asking.
This review has convinced me that once the 2600K shows up again it's all I'll need. I was going to wait for socket 2011 but damn, the 2600 is already more than twice as fast in everything than my poor ol' Q6600.