Issues with RTX4090 FE waterblock (Bitspower)

mxthunder · Tuesday at 1:39 PM

So about 2 years ago Microcenter had this 4090 block on sale for $50. Being bitspower, I figured it would be OK, but the deal seemed to good to be true.
Since I put it in my loop I have had issues with corrosion and green floating stuff (not even my main concern and has been mostly mitigated at this point)
the bigger issue to me is the hotspot temps. It seems like I have to reseat the card every 2-3 months. Temps will be great (45-50* core and 60-65* hot spot) but then I will check the temps after a while, today my core was 55-60* and hotspot was almost 100*C. Im getting sick of taking the loop apart to reseat this block. in the 15 years I have been watercooling GPUs, I have never seen this before.
Anyone have some experience water cooling the 4090 FE? Does this occur with all blocks? I will drop some $$ and buy an alphacool or EK (ugh) block right now if I dont have to deal with this **** anymore.

dgianstefani · Tuesday at 1:40 PM

Corrosion and bio growth should be your concern as they can and will destroy your loop.

Corsair makes good and cheap blocks, so does AC.

Optimus if you want to splurge.

mxthunder · Tuesday at 1:47 PM

I mean i can drain the loop and refill in a few seconds. I have that issue mostly dealt with I just had to change up my additives a bit.

mxthunder · 2025-03-27T19:04:25+0000

Picked up some TF9. Took the loop apart. Reseated the GPU block, CPU block, and disassembled both to clean the corrosion out. I would say the TIM was definitely pumped out of the GPU block. Not sure what cause the corrosion issues last year, but it was a thin green layer, i was able to scrape it off with my finger nail. vertical mounted the GPU while i was at it. hope the riser doesnt cause me any issues. 5 straight hours of back breaking work.

ShrimpBrime · 2025-03-27T19:26:02+0000

Looks like plastisizer. That might be from the tubing.

Vya Domus · 2025-03-27T19:43:33+0000

Use PTM7950.

The green stuff is probably residue build up from the liquid itself, just use a clear premixed coolant.

ShrimpBrime said:
Looks like plastisizer. That might be from the tubing.

I don't think it's plasticizer, it takes ages for that stuff to build up.

ir_cow · 2025-03-27T19:46:48+0000

Id had this issue before. Ended up being the bras fittings weren't really brass. Have to watch out everything these days...

In your case it doesn't look like corrosion at all, just debris from the tube or additives.

mxthunder · 2025-03-27T19:47:15+0000

I use distilled water and algicide. After these issues I also added some corrosion inhibitor. ive had pretty squeaky clean loops for the last 15 years until either this bitspower block or the corsair rad.

ShrimpBrime · 2025-03-27T20:02:34+0000

Vya Domus said:
Use PTM7950.

The green stuff is probably residue build up from the liquid itself, just use a clear premixed coolant.

I don't think it's plasticizer, it takes ages for that stuff to build up.

Was looking at it on the phone. Now that I'm in front of a normal monitor, think I may be mistaken, really hard to tell honestly.

mxthunder said:
I use distilled water and algicide. After these issues I also added some corrosion inhibitor. ive had pretty squeaky clean loops for the last 15 years until either this bitspower block or the corsair rad.

Is the radiator aluminum? If it is, I would ditch it and find a copper one instead/

Outback Bronze · 2025-03-27T20:34:24+0000

mxthunder said:
I use distilled water and algicide.

Had this issue 20 years ago. Never again.

mxthunder said:
After these issues I also added some corrosion inhibitor.

Tried this 20 years ago and haven't looked back

ir_cow · 2025-03-27T21:07:10+0000

Distilled water only with brass and copper is the only way to go. Any additives just ruins these loops.

System Name	Daily driver
Processor	i9 13900k
Motherboard	Z690 Aorus Master
Cooling	Custom loop
Memory	2x16 GB GSkill DDR5 @ 6000
Video Card(s)	RTX4090 FE
Storage	2x 2TB 990 Pro SSD 1x 2TB 970 evo SSD, 1x 4TB HDD
Display(s)	LG 32" 2560x1440
Case	Fractal Design Meshify 2 XL
Audio Device(s)	onboard
Power Supply	beQuiet Dark Power 12 1000W
Mouse	Razer Death adder
Keyboard	Razer blackwidow v3
VR HMD	n/a
Software	Windows 11 pro
Benchmark Scores	Heaven 4.0 @ 2560x1440 270.5 FPS

System Name	Silent/X1 Yoga/S25U-1TB
Processor	Ryzen 9800X3D @ 5.4ghz AC 1.18 V, TG AM5 High Performance Heatspreader/1185 G7/Snapdragon 8 Elite
Motherboard	ASUS ROG Strix X870-I, chipset fans replaced with Noctua A14x25 G2
Cooling	Optimus Block, HWLabs Copper 240/40 x2, D5/Res, 4x Noctua A12x25, 1x A14G2, Conductonaut Extreme
Memory	64 GB Dominator Titanium White 6000 MT, 130 ns tRFC, active cooled, TG Putty Pro
Video Card(s)	RTX 3080 Ti Founders Edition, Conductonaut Extreme, 40 W/mK 3D Graphite pads, Corsair XG7 Waterblock
Storage	Intel Optane DC P1600X 118 GB, Samsung 990 Pro 2 TB
Display(s)	34" 240 Hz 3440x1440 34GS95Q LG MLA+ W-OLED, 31.5" 165 Hz 1440P NanoIPS Ultragear, MX900 dual VESA
Case	Sliger SM570 CNC Alu 13-Litre, 3D printed feet, TG Minuspad Extreme, LINKUP Ultra PCIe 4.0 x16 White
Audio Device(s)	Audeze Maxwell Ultraviolet w/upgrade pads & Leather LCD headband, Galaxy Buds 3 Pro, Razer Nommo Pro
Power Supply	SF1000 Plat, 13 A transparent custom cables, Sentinel Pro 1500 Online Double Conversion UPS w/Noctua
Mouse	Razer Viper V3 Pro 8 KHz Mercury White w/Pulsar Supergrip tape, Razer Atlas, Razer Strider Chroma
Keyboard	Wooting 60HE+ module, TOFU-R CNC Alu/Brass, SS Prismcaps W+Jellykey, LekkerL60 V2, TLabs Leath/Suede
Software	Windows 11 IoT Enterprise LTSC 24H2
Benchmark Scores	Legendary

System Name	Daily driver
Processor	i9 13900k
Motherboard	Z690 Aorus Master
Cooling	Custom loop
Memory	2x16 GB GSkill DDR5 @ 6000
Video Card(s)	RTX4090 FE
Storage	2x 2TB 990 Pro SSD 1x 2TB 970 evo SSD, 1x 4TB HDD
Display(s)	LG 32" 2560x1440
Case	Fractal Design Meshify 2 XL
Audio Device(s)	onboard
Power Supply	beQuiet Dark Power 12 1000W
Mouse	Razer Death adder
Keyboard	Razer blackwidow v3
VR HMD	n/a
Software	Windows 11 pro
Benchmark Scores	Heaven 4.0 @ 2560x1440 270.5 FPS

System Name	Daily driver
Processor	i9 13900k
Motherboard	Z690 Aorus Master
Cooling	Custom loop
Memory	2x16 GB GSkill DDR5 @ 6000
Video Card(s)	RTX4090 FE
Storage	2x 2TB 990 Pro SSD 1x 2TB 970 evo SSD, 1x 4TB HDD
Display(s)	LG 32" 2560x1440
Case	Fractal Design Meshify 2 XL
Audio Device(s)	onboard
Power Supply	beQuiet Dark Power 12 1000W
Mouse	Razer Death adder
Keyboard	Razer blackwidow v3
VR HMD	n/a
Software	Windows 11 pro
Benchmark Scores	Heaven 4.0 @ 2560x1440 270.5 FPS

System Name	I don't name my rig
Processor	14700K
Motherboard	Asus TUF Z790
Cooling	Air/water/DryIce
Memory	DDR5 G.Skill Z5 RGB 6000mhz C36
Video Card(s)	RTX 4070 Super
Storage	980 Pro
Display(s)	1080P 144hz
Case	Open bench
Audio Device(s)	Some Old Sherwood stereo and old cabinet speakers
Power Supply	Corsair 1050w HX series
Mouse	Razor Mamba Tournament Edition
Keyboard	Logitech G910
VR HMD	Quest 2
Software	Windows
Benchmark Scores	Max Freq 13700K 6.7ghz DryIce Max Freq 14700K 7.0ghz DryIce Max all time Freq FX-8300 7685mhz LN2

Issues with RTX4090 FE waterblock (Bitspower)

mxthunder

dgianstefani

TPU Proofreader

mxthunder

mxthunder

ShrimpBrime

Vya Domus

ir_cow

mxthunder

ShrimpBrime

Outback Bronze

Super Moderator

ir_cow

System Name	Good enough
Processor	AMD Ryzen R9 7900 - Alphacool Eisblock XPX Aurora Edge
Motherboard	ASRock B650 Pro RS
Cooling	2x 360mm NexXxoS ST30 X-Flow, 1x 360mm NexXxoS ST30, 1x 240mm NexXxoS ST30
Memory	32GB - FURY Beast RGB 5600 Mhz
Video Card(s)	Sapphire RX 7900 XT - Alphacool Eisblock Aurora
Storage	1x Kingston KC3000 1TB 1x Kingston A2000 1TB, 1x Samsung 850 EVO 250GB , 1x Samsung 860 EVO 500GB
Display(s)	LG UltraGear 32GN650-B + 4K Samsung TV
Case	Phanteks NV7
Power Supply	GPS-750C

System Name	Raptor Baked
Processor	14900k w.c.
Motherboard	Z790 Hero
Cooling	w.c.
Memory	48GB G.Skill 7200
Video Card(s)	Zotac 4080 w.c.
Storage	2TB Kingston kc3k
Display(s)	Samsung 34" G8
Case	Corsair 460X
Audio Device(s)	Onboard
Power Supply	PCIe5 850w
Mouse	Asus
Keyboard	Corsair
Software	Win 11
Benchmark Scores	Cool n Quiet.