PSU Haswell incompatibility question

miha2 · Nov 29, 2014

Stupid situation happened to me. I thought to get Antec EA-650 PSU, but was recommended to get 750w unit. As I was buying it with Newegg and there is an option to choose wattage, I chose Antec EA-750. I naively hoped it's the same as 650, but it doesn't support Haswell. 650 does, this one doesn't. So, there are only 4 pins for +12v. Maybe there is some Molex to 8pin +12v connector? I found one to 4pin, will this work? I found Haswell compatible PSU for $20 more, but I want to build for as low as I can, having all best parts for money.

My current build is $1184, don't want to go over $1200.

maestro0428 · Nov 29, 2014

Sorry to hear about your situation. There are 4 pin to 8pin cpu adaptors. You should be able to run it with only four though as long as you aren't overlocking yet. If you disable deep sleep options you may be okay with that power supply, but don't quote me on that.

miha2 · Nov 29, 2014

I may be overclocking, but not any time soon. I think if I will ever do it, it'll happen in 2-3 years. By that time, I might get a decent PSU. For now, however, I won't overclock, but still I need a good PSU and 8pin

maestro0428 · Nov 29, 2014

As for a psu, I only recommend Seasonic (or brands that they make psus for ie: XFX, some Corsairs). You need less wattage then you think. For example, one of my rigs has a 520w unit with 4.2ghz 3570k, 780gtx sc, 6 SSDs, lotsa fans etc. Still more than enough power.

This one http://www.newegg.com/Product/Product.aspx?Item=N82E16817151119
Or this one if you want dual graphics
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151132

miha2 · Nov 29, 2014

Right now I have only 1 concern: if I can convert either 1 4pin or several molex to 8pin connector. If it is safe, will be as good as having 8pin, and everything related. It may seem as several concerns, but it's all about one.

maestro0428 · Nov 29, 2014

Its not as good as both 4 pins installed, as it won't have access to as much or little voltage as it needs. I have run adapters like you need before, but in lower spec rigs that likely didn't need all 8 pins.

miha2 · Nov 29, 2014

BTW, my config is:
i5 4690K
Gigabyte GA-Z97X-SLI
1.5V memory
Asus R9290-DC2OC-4gd5
4 case fans

And I want Platimun only. Among PSUs I trust Corsair, Thermaltake and Antec. First 2 are expensive.

maestro0428 · Nov 29, 2014

I use a 660w Seasonic Platinum in one of my rigs and its great. Very efficient. Antec, sure, but I don't like Thermaltakes and Corsair has had issues lately and also seems to be messing with its psu manufacturing.
This one for single gpu
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151121
This one for dual
http://www.newegg.com/Product/Product.aspx?Item=N82E16817151111

Yeah, they aint cheap, but they are the best.

miha2 · Nov 29, 2014

Antec HCP-750 is $130

And my friend already ordered. Of course, he can RMA it, but it will take time and... make him not willing to buy more for me later?

maestro0428 · Nov 29, 2014

So, only 19 bucks more for one of the best PSUs around.

miha2 · Nov 29, 2014

How many times should I repeat? I am on the tightest budget. I already have a build for $1184, but I basically can't spend more than $1200. So if I exchange the PSU, it should be no more than $115. Yet good. You may advertise any brand, but unless you can somehow prove it is a good PSU AND will spare me $40, I will definitely buy Seasonic you advertise.

maestro0428 · Nov 29, 2014

Sorry to go past your budget. All of Seasonics PSUs are high quality, even the budget ones. I have never had an issue or replaced a single one and I have built a lot of PCs. My previous suggestions are gold certified and more affordable.

miha2 · Nov 30, 2014

Antec's Platinum PSUs give out as much as more than 90% to parts, that's more than enough for me - 85 is kind of not what I'm after.

miha2 · Nov 30, 2014

What about Corsair AX760?

antec support · Nov 30, 2014

Hi, our EA-750 Green is Haswell-compatible. If you face any issue, you can deactivate the C6/C7 sleep states in your UEFI/BIOS settings.
For the connector, the PSU has a 8(4+4)-pin CPU connector (=convertible as 4 or 8-pin), so you don't need any adaptor.

Dark Lord of Tech · Nov 30, 2014

miha2 · Nov 30, 2014

Antec EA-750 is green? What does it mean? It's not a gaming PSU? Also, why does Newegf state then that it has only 4pin for CPU?

Dark Lord of Tech · Nov 30, 2014

List above has most of the info but it's not updated.

Connectors Antec EA-750
1 x Main Connector 20+4pin,
1 x ATX12V 4pin,
1 x EPS12V 8pin,
9 x peripheral,
9 x SATA,
2 x 6+2pin PCI-E,
2 x 6pin PCI-E,
1 x FDD

miha2 · Nov 30, 2014

It is (/was) stated that it's not green, but Platinum. Clear words, "Haswell support: No"

So it's either Newegg screwed something up, or I was blind enough to have read that.

For now, I'll just wait for the box to arrive and then see if it is Haswell compatible, and if so, I'll contact Newegg. If not - whom do I contact? Antec...

BTW, I thought EA is something like EarthWatts (not sure what it means though) but 80+ standard is not a part of model name/number, but is written after it instead.

Dark Lord of Tech · Nov 30, 2014

Link me your exact PSU?

miha2 · Nov 30, 2014

Strangely enough, right now it is not sold (or anymore) directly on Newegg, but instead, it is sold by PCRush on Newegg. For way much more money than I bought it. (Most probably Black Friday?)

Just yesterday it was available.

Still,
http://www.newegg.com/Product/Product.aspx?Item=9SIA1N82843200

Dark Lord of Tech · Nov 30, 2014

Most of the time the sleep states aren't an issue and that is a decent power supply.

miha2 · Nov 30, 2014

Just now visited Antec, and it clearly states that there is a 8pin connector. That is why I want to receive it and then see if it is Haswell compatible/has 8pin connector and that way I will make 100% sure it is. Otherwise, I can't say. And of course I will let you all know.

Dark Lord of Tech · Nov 30, 2014

It will have an 8 pin for sure.

Dark Lord of Tech · Nov 30, 2014

Here's another list.

Antec
According to Antec, the following units are "fully compatible" with Haswell:

EarthWatts Green: EA-650 Green
EarthWatts Platinum: EA-450, EA-550, EA-650
High Current Game: HCG-750, HCG-900
High Current Gamer M: HCG-520M, HCG-620M, HCG-750M, HCG-850M
High Current Pro: HCP-750, HCP-850, HCP-1200
High Current Pro Platinum: HCP-1000 Platinum, HCP-850 Platinum (OC link), HCP-1000 Platinum (OC link), HCP-1300 Platinum (OC link)
NeoEco C: Neo Eco 620C
Signature: SG-650, SG-850
TruePower Gold: TP-550G, TP-650G
TruePower New: TP-550, TP-650, TP-750, TP750 Blue
TruePower Quattro: TPQ-850, TPQ-1000, TPQ-1200, TPQ-1200 OC
VP: VP550P V2, VP650P V2, VP650PM
VP F: VP550 F, VP630 F

However, the compatibility of these units "has not been confirmed yet":

BP: BP-350, BP430, BP500U, BP550 Plus rev 1
EarthWatts Green: EA-350 Green, EA-430 Green, EA-500 Green, EA-750 Green
High Current Game: HCG-400, HCG-520, HCG-620
High Current Gamer M: HCG-400M
NeoEco C: Neo Eco 400C, Neo Eco 450C, Neo Eco 520C
VP: VP350P, VP450, VP450P, VP550P
VP F: VP450 F

PSU Haswell incompatibility question

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