BlueMoon3000
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Hi there folks. I'm planning a watercooled build with 770s and since I'll be playing on 1440p I was hoping to get a 4GB version. I know the classified 4GB models are not reference PCBs and therefore not compatible with most 770 waterblocks, but I noticed a new version on newegg today. This model (04G-P4-3774-KR) seems like the standard SC 770 with an ACX cooler, but it has 4GB of VRAM. My hope is that this version using the reference PCB and will be compatible with the EK Waterblocks I want to get.
Newegg link: newegg.com/Product/Product.aspx?Item=N82E16814130945
Is anybody able to confirm that this model uses a reference PCB?
Thanks!
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CAxVIPER
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/30 16:54:13
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Even if it uses the reference PCB the block wouldn't work unless they moved 2gb to the back and left the other 2gb in the same exact spot.
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gbryett
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/30 16:57:20
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As far as I know this is based on the gtx 680 pcb with 2gb on the front side and 2gb on the back side. I suggest emailing evga support to double check. Also EK have a cooling configurator you can use, or worst case send them an email too...
Good luck.
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_Nite_
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/30 17:02:31
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the Blackplate for the 2GB 770 won't fit the 4GB 770 SC ACX I just got, so chances are waterblocks for the 2GB cards won't fit either.
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BlueMoon3000
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/30 17:04:04
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I checked the EK cooling configurator but it doesn't look like they've updated it with this variant yet. It does look like they've kept the original 2GB in front and added 2GB on the back. If you compare to the back 2GB ACX variant which the cooling configurator shows as a match for FC770 waterblocks, it looks identical except with additional RAM modules. Obviously this method of comparing cards based on newegg images isn't exactly scientific, so I will go ahead and email EVGA to try to confirm.
If anyone else is curious to see the differences between this and the standard 2GB ACX variant - you can see the newegg link for that version here: newegg.com/Product/Product.aspx?Item=N82E16814130919
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BlueMoon3000
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/30 17:05:39
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_Nite_
the Blackplate for the 2GB 770 won't fit the 4GB 770 SC ACX I just got, so chances are waterblocks for the 2GB cards won't fit either.
The backplate wouldn't fit because the screws holes would not line up or because it bumped against the ram modules?
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_Nite_
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/30 19:40:40
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BlueMoon3000
_Nite_
the Blackplate for the 2GB 770 won't fit the 4GB 770 SC ACX I just got, so chances are waterblocks for the 2GB cards won't fit either.
The backplate wouldn't fit because the screws holes would not line up or because it bumped against the ram modules?
My guess is the memory modules, cause the card is the same exact dimensions as the 2Gb modules I didn't get a backplate, I'm just going by what evga tech jacob told me and all he said was didn't fit
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BlueMoon3000
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/31 00:31:48
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_Nite_
BlueMoon3000
_Nite_
the Blackplate for the 2GB 770 won't fit the 4GB 770 SC ACX I just got, so chances are waterblocks for the 2GB cards won't fit either.
The backplate wouldn't fit because the screws holes would not line up or because it bumped against the ram modules?
My guess is the memory modules, cause the card is the same exact dimensions as the 2Gb modules
I didn't get a backplate, I'm just going by what evga tech jacob told me and all he said was didn't fit
Gotcha. My thought/hope is that if the only difference is in fact the memory modules, then it should work fine with a waterblock since the screw location and depth will be unaffected. Hopefully I'll hear something from either EK or EVGA confirming this!
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_Nite_
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/31 00:37:57
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BlueMoon3000
_Nite_
BlueMoon3000
_Nite_
the Blackplate for the 2GB 770 won't fit the 4GB 770 SC ACX I just got, so chances are waterblocks for the 2GB cards won't fit either.
The backplate wouldn't fit because the screws holes would not line up or because it bumped against the ram modules?
My guess is the memory modules, cause the card is the same exact dimensions as the 2Gb modules
I didn't get a backplate, I'm just going by what evga tech jacob told me and all he said was didn't fit
Gotcha. My thought/hope is that if the only difference is in fact the memory modules, then it should work fine with a waterblock since the screw location and depth will be unaffected. Hopefully I'll hear something from either EK or EVGA confirming this!
well this card just released like last week, I literally just installed mine after getting it from UPS yesterday, so with it being a fresh week old card now, comaptibility with water blocks will be slim.
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BlueMoon3000
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/31 01:59:23
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Just got emails back from both EVGA and EK. EVGA confirmed that this model uses a reference PCB and EK has confirmed that it will work with their FC770 GTX waterblock, which is the same one that works with the stock 770! I believe that the backplate will not be compatible, but for those looking to watercool and still have 4GB VRAM, I think this is the model to go with. Thanks everyone for the help! EDIT: Of course while waiting to hear about the compatibility the card has sold out on Newegg and Amazon, so I'll have to wait for that anyways :D
post edited by BlueMoon3000 - 2013/07/31 02:03:14
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GTXJackBauer
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/07/31 02:16:04
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Yes those waterblocks will work with those reference design PCBs whether they are 2 GB or 4 GB.
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Kilo-
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/09/09 17:53:38
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EK issued a statement last September 6 saying the waterblock is not compatible (www.techpowerup.com/190302/evga-geforce-gtx-770-4-gb-found-incompatible-with-ek-fc770-gtx.html)
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page175
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/09/10 12:28:23
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I had exactly the same issue deciding on whether to go with the 4GB or 2GB. Thanks for looking into this and finding a 4GB version that works with the EK block!. Now, I just need to figure out the back plate issue...
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jonkrmr
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/09/10 13:24:44
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 You should check out this link: http://www.ekwb.com/news/391/19/EVGA-GeForce-GTX-770-4GB-found-incompatible-with-EK-FC770-GTX/ It's not the card layout and screw hole placements that make the FC770 blocks incompatible with the reference PCB 4GB cards. Looks like they changed the type of inductor coils used for Vdd voltage circuitry. Specifically the one on the end of the top bank of coils. It is taller than the others. Mounting the block to the 4 GB card works but causes a scary bend in the PC board of the card. Look at the picture in the link!
post edited by jonkrmr - 2013/09/10 18:29:25
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jonkrmr
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/09/10 13:29:09
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Should be a relatively simple machining modification to the FC770 block to make it compatible with the 4GB version of the card. I would suspect it will not be long before revised versions of the block hit the retail chain.
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_Havoc_
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/10/15 21:26:33
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Anyone know what part of EK-FC770 would be needed to be changed (pic would be great) I ask because plan upgrading from single GTX 680 to SLI 770 ACX 4GB's would like to watercool them. My step dad is a machinist so if I knew what part need's to be shaved down to make block fit may ask my step dad to give it a whirl.
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taintkicker
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2013/11/08 23:18:34
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I had my xspc waterblock for a 3774 modified by my machine shop to fit and in the testing now and so far so good
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Thaal Sinestro
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/04/27 17:38:29
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Hello all, I have the EK 770 reference waterblock. I have used my rotary tool to grind the section in question down a bit, and plan to not use the thermal pad on that section. Instead I wil use thermal paste. I think that should do it. I' m waiting to receive my GTX 770 4GB 3774 to see if it works. Will post pics, and any relative info when done to let everyone know exactly how to mod they're waterblock. Thank you:) P.S. Anyone think using themal paste instead of the pad, to get more clearance for the block and prevent the PCB from warping, is a bad idea?
post edited by Thaal Sinestro - 2014/04/27 17:54:55
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Thaal Sinestro
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/04/30 20:50:39
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XrayMan
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/04/30 21:04:30
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Thaal Sinestro
No one cares do they?
I've PM'd a couple members to help you. Hope they get here soon for you. Just be patient.
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bcavnaugh
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/04/30 21:43:52
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☄ Helpfulby XrayMan 2014/04/30 22:55:05
Thaal Sinestro
Hello all, I have the EK 770 reference waterblock. I have used my rotary tool to grind the section in question down a bit, and plan to not use the thermal pad on that section. Instead I wil use thermal paste. I think that should do it. I' m waiting to receive my GTX 770 4GB 3774 to see if it works. Will post pics, and any relative info when done to let everyone know exactly how to mod they're waterblock. Thank you:)
P.S. Anyone think using themal paste instead of the pad, to get more clearance for the block and prevent the PCB from warping, is a bad idea?
You may want to re-think the use of thermal paste as the heat may cause it to not contact each side. I would use a back plate to help with any warping that you may think you have with the block. You can get more than one size of thermal pad to layout the GPU Water Block and Back Plate 100-BP-2770-B9Once you lay it out place the thermal pad test strip and it should be sung but not lifting. Thermal Padding, 0.5mm Thick Thermal Padding, 0.7mm Thick Thermal Padding, 1.0mm Thick You may want to look at his as well Solidifying Thermal CompoundI would help also for your layout to take photos of part that you plan to put together and post here it give us a better clue of what you are trying to do here. Make sure you also keep all the parts for the EVGA Cooler you will need to reinstall it if you have to send the card in. From: http://www.ekwb.com/news/391/19/EVGA-GeForce-GTX-770-4GB-found-incompatible-with-EK-FC770-GTX/You will have more issues then this one here:  If your card is new enough or within 90 days I would recommend that you Step-Up your card. I had three cards that had the same issue and I Step-Up three so that I could put water blocks on them. I learned from this that, 1) Find a water block for the GPU ( Model ) you want or find a GPU with the water block and pre-installed. In the long run you will pay less for what you want to do. If you damage the GPU you are out of the cost and will have to buy a new one. I forgot to say but you better do a water pressure test the water block before you mount it if you are really going to try this.
post edited by bcavnaugh - 2014/08/09 11:04:28
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XrayMan
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/04/30 22:12:17
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Thanks for responding BC to my PM.
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notfordman
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/04/30 22:36:53
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That is some good info bcav, thanks for helping. The solidifying compound you listed might be the best way to go, it states it becomes rubbery. 
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Thaal Sinestro
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/01 08:01:04
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Thank you bcav! That really helps! I think the solidifying thermal paste in the best bet. I just don't want it to come out like that pic up there. I have ground that section down... about .25mm. Just got my card too. Will test card on weekend and post my installation . Thank you again!
post edited by Thaal Sinestro - 2014/05/01 10:06:26
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Ntrain96
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/01 08:12:23
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Why would ANYONE waste money waterblocking a 770 when for less money you can get a higher performance 780 in total for less money?
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Thaal Sinestro
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/01 10:09:30
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I would cuz I want to watercool and can't afford a 780!!! Obviously! If I could I would have!
post edited by Thaal Sinestro - 2014/05/01 10:13:34
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Ntrain96
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/01 11:32:04
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Thaal Sinestro
I would cuz I want to watercool and can't afford a 780!!! Obviously! If I could I would have!
Yeah, but if you have the money to buy a GTX 770($325 roughly), and the money for the waterblock($100-125), plus all the needed fittings etc.......your in the pricerange of just buying a GTX 780...............so in a sense the logic of water cooling a cheaper lower performing card doesn't make sense in a lot of ways.
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bcavnaugh
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/02 07:08:25
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Ntrain96
Thaal Sinestro
I would cuz I want to watercool and can't afford a 780!!! Obviously! If I could I would have!
Yeah, but if you have the money to buy a GTX 770($325 roughly), and the money for the waterblock($100-125), plus all the needed fittings etc.......your in the pricerange of just buying a GTX 780...............so in a sense the logic of water cooling a cheaper lower performing card doesn't make sense in a lot of ways.
It dose if you want to build a Custom Water Loop and it is fun and you learn a lot and it cost a hole lot less if you destroy a lower grade Video Card then a High Grade Video Card. Some Users forget the fun side of Building Custom Computers, I think this happened shortly after the Bean Counter Department took over the IT Department.  Nice KittyRig you have Ntrain96
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Ntrain96
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/02 07:11:20
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bcavnaugh
Ntrain96
Thaal Sinestro
I would cuz I want to watercool and can't afford a 780!!! Obviously! If I could I would have!
Yeah, but if you have the money to buy a GTX 770($325 roughly), and the money for the waterblock($100-125), plus all the needed fittings etc.......your in the pricerange of just buying a GTX 780...............so in a sense the logic of water cooling a cheaper lower performing card doesn't make sense in a lot of ways.
It dose if you want to build a Custom Water Loop and it is fun and you learn a lot and it cost a hole lot less if you destroy a lower grade Video Card then a High Grade Video Card.
Some Users forget the fun side of Building Custom Computers, I think this happened shortly after the Bean Counter Department took over the IT Department.
Nice KittyRig you have Ntrain96
I like building custom computers too(I did thank you)....I think most here do obviously........but I value performance first. Id rather have the higher performance card for the money. =P
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Thaal Sinestro
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Re:GTX 770 4GB w ACX (3774) waterblock compatibility?
2014/05/02 10:05:47
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bcavnaugh
Ntrain96
Thaal Sinestro
I would cuz I want to watercool and can't afford a 780!!! Obviously! If I could I would have!
Yeah, but if you have the money to buy a GTX 770($325 roughly), and the money for the waterblock($100-125), plus all the needed fittings etc.......your in the pricerange of just buying a GTX 780...............so in a sense the logic of water cooling a cheaper lower performing card doesn't make sense in a lot of ways.
It dose if you want to build a Custom Water Loop and it is fun and you learn a lot and it cost a hole lot less if you destroy a lower grade Video Card then a High Grade Video Card.
Some Users forget the fun side of Building Custom Computers, I think this happened shortly after the Bean Counter Department took over the IT Department.
Nice KittyRig you have
Bcav gets it:)
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