Was the 3770k TDP confusion resolved? (77W vs 95W)

[Ferzerp]

CPU-Z lists (detects?) it as 77W.

Ark lists it as 77W.

The box has a big fat 95W on it.


Is the discrepancy just a box misprint?

 

[Rvenger]

My box has a big 95w stamp on it I am sure mine will be sucking down 95w once I overclock it.

 

[ShintaiDK]

Its a box misprint. Also verified by Intel.

They are 77W.

 

[LOL_Wut_Axel]

The CPU TDP is 77W. The 95W on the box is just a specification for the thermal envelope the stock heatsink and fan need to be able to fulfill.

 

[JAG87]

It's not a misprint. They are printed as 95W to avoid confusion because LGA1155 needs to be backwards compatible with i7 2xxx 95W processors.

 

[Lonyo]

3570k is also 95w on box

 

[Idontcare]

Mine says 95W.

It makes no sense to me that just because the platform needs to be 95W TDP capable that the CPU itself is printed as being 95W TDP. They don't do that with the S-spec chips and so on.

I suspect that Intel intentionally labeled the boxes 95W to ensure a beefy enough HSF is used not because it actually needs to be capable of handling 95W but because they want the temperatures to be low and spec'ing TDP is a somewhat crappy proxy for specifying thermal resistance.

I suspect that in the future we are going to see Intel specifying both the TDP as well as the minimum thermal resistance required for CPU cooling solutions so that the CPU can operate well below its TJmax.

At 14nm it won't do any good to specify a TDP of 62W if the thermal resistance of the HSF is so high that the CPU throttles at 110C while dissipating a mere 50W.

For now it is sufficient for Intel to just over-spec the TDP as a means of ensuring OEM's aren't packaging IB's with HSF's that can't keep the temps low while dissipating the heat at the same time.

 

[IntelEnthusiast]

I really love to read Idontcare answers I learn so much from him. I heard that they are 77w TDP but that they labeled them as 95w to ensure that they got a good enough HSF (heatsink/fan) to meet their needs form the OEMs.

 

[skipsneeky2]

I really love to read Idontcare answers I learn so much from him. I heard that they are 77w TDP but that they labeled them as 95w to ensure that they got a good enough HSF (heatsink/fan) to meet their needs form the OEMs.

Dodge did the same thing back in the 1970s during the gas shortage with their motors in their vehicles,they underrated their estimated hp for cheaper insurance purposes.

Excellent idea from intel i think so they won't cheap out on the cooler as we know OEM'S love to cheap out on anything possible.

 

[ShintaiDK]

They are 77W.

http://ark.intel.com/products/65520/Intel-Core-i5-3570K-Processor-(6M-Cache-up-to-3_80-GHz)

And when you contact Intel they say its a misprint. And new boxes should be 77W labeled.

 

[dma0991]

Probably mislabeling.

 

[notty22]

In the review here, Anand mentioned :

There are five 77W desktop parts launching today, three 65W parts and one 45W part. The latter four are either T or S SKUs (lower leakage, lower TDP and lower clocked parts), while the first five are traditional, standard power parts. Note that max TDP for Ivy Bridge on the desktop has been reduced from 95W down to 77W thanks to Intel's 22nm process. The power savings do roughly follow that 18W decrease in TDP. Despite the power reduction, you may see 95W labels on boxes and OEMs are still asked to design for 95W as Ivy Bridge platforms can accept both 77W IVB and 95W Sandy Bridge parts.

 

[Rvenger]

Probably mislabeling.

Well, now we know how to distinguish the early Ivybridge variants.