What is the difference between GDDR6 VRAM and regular DDR memory for recycling?

VRAM is graphics double-data-rate DRAM made specifically for GPUs and is not interchangeable with DDR4/DDR5. Three ways to tell them apart: the package is a 180-ball BGA (DDR4 uses 78/96-ball packages); the die marking starts with K4ZAF (Samsung), MT61K (Micron) or H56G (SK Hynix); and the speed suffix is expressed in Gbps (HC14 = 14Gbps). VRAM is mounted in groups of 12-24 dies on graphics cards and gaming laptops — it never appears on memory modules or in phones. Grade by marking prefix plus speed suffix, and never mix VRAM into the DDR pile.

How much is a good harvested GDDR6/GDDR6X die worth?

2026 reference ranges per good harvested die: GDDR6 8Gb 12Gbps about CNY 6-10; 14Gbps CNY 9-15; 16-18Gbps CNY 14-24 (Samsung K4ZAF325BM-HC16, Micron MT61K256M32JE-16). GDDR6X 16Gb 19-21Gbps about CNY 25-40 (Micron MT61K512M32KHD, used on RTX 3070/3080/4070); 24Gbps flagship stock CNY 35-55 (RTX 4090). At equal capacity, faster parts are worth more — 16Gbps trades nearly double 12Gbps. Scrap or failed dies run CNY 1-3.

How do you test harvested VRAM dies, and can mining-card memory be bought?

Three steps: check the marking for vendor and speed grade — sanded and remarked parts are downgraded on sight; then solder the dies to a modified GPU test bench and run a VRAM stress test (MemTest Vulkan or OCCT VRAM) — dies that pass long-duration testing price as good stock; finally verify lot consistency, sorting mixed-speed lots separately. Mining-card dies are the same silicon as gaming-card dies — if they pass stress testing they can be bought as good stock, but keep them on their own grade: long-term full-load mining raises the cold-solder rate, so they typically buy at 80-90% of gaming-card good-die pricing.

GDDR6 & GDDR6X Graphics Memory Recycling: GPU VRAM Chip Buyback for Samsung, Micron & SK Hynix — 2026 Prices

One Graphics Card Equals Twelve "Little DDRs": the High-Density Memory Category Still Sold by the Kilo

Graphics cards have the highest VRAM die density of any consumer electronic: an RTX 3060 12GB carries 12 GDDR6 dies, and an RTX 4090 24GB carries 24 GDDR6X dies. In terms of circulating volume and retirement speed, the only comparable wave is the second mining-card retirement — through 2025-2026, first-generation RTX 30 mining cards and RTX 40 gaming cards upgraded during rational replacement cycles entered the teardown window at the same time, sending tens of millions of GDDR6/GDDR6X dies from graphics cards into the recycling channel every year. Yet almost all of this VRAM still moves as whole cards or mixed scrap: good dies worth CNY 10-40 each routinely lose half their value when priced through the residual value of a whole card. The real value of a recycled graphics card is not the cooler or the PCB — it is those 12-24 BGA dies.

VRAM Is Not Regular Memory: Interface, Package and Speed Grade Decide the Value

GDDR6/GDDR6X is graphics double-data-rate DRAM made exclusively for GPUs and is not interchangeable with DDR4/DDR5 — the most common mistake in recycling is quoting VRAM with DDR pricing. Two families, with clear generational tiers: GDDR6 (Samsung K4ZAF325BM, Micron MT61K256M32JE, SK Hynix H56G42AS8DX — the workhorse of RTX 20/30/40 and RX 5000/6000/7000, 8Gb at 12-18Gbps); GDDR6X (produced only by Micron — the MT61K512M32KHD family, exclusive to NVIDIA RTX 3070 and above, 16Gb at 19-24Gbps). The value split is the speed grade: a 12Gbps RTX 2060-era die and a 24Gbps RTX 4090 flagship die differ nearly tenfold in buyback price, so always read the full suffix (HC14 = 14Gbps, HC16 = 16Gbps, KHD-21 = 21Gbps).

GDDR6/GDDR6X Buyback Reference Prices (2026)

Reference Price (CNY) for graphics memory recycling, graded by die health, 2026:

Category	Representative Part Numbers	Reference Price (CNY)
Scrap / cold-solder / failed dies	All brands	CNY 1-3 / pc
GDDR6 8Gb 12Gbps good die	Samsung K4ZAF325BM-HC12, Micron MT61K256M32JE-12, SK Hynix H56G42AS8DX-012	CNY 6-10 / pc
GDDR6 8Gb 14Gbps good die	Samsung K4ZAF325BM-HC14, SK Hynix H56G42AS8DX-014	CNY 9-15 / pc
GDDR6 8Gb 16-18Gbps good die	Samsung K4ZAF325BC-HC16, Micron MT61K256M32JE-16/-18	CNY 14-24 / pc
GDDR6X 16Gb 19-21Gbps good die	Micron MT61K512M32KHD-19/-21 (RTX 3070/3080/4070)	CNY 25-40 / pc
GDDR6X 16Gb 24Gbps flagship die	Micron MT61K512M32KHD-24 (RTX 4090)	CNY 35-55 / pc
Mining-card dies passing stress test	All brands	80-90% of same-tier good-die price

Note: 2026 reference ranges, moving with VRAM spot prices; complete GPU boards with VRAM, original whole cards and volume lots quoted separately.

Testing and Verification: How Good Dies Are Proven

VRAM testing follows a fixed, manageable flow: first read the marking — confirm the vendor prefix (K4ZAF/Samsung, MT61K/Micron, H56G/SK Hynix) and the speed suffix; sanded and remarked dies are downgraded on sight. Second, power-on verification — solder the dies onto a modified GPU test bench or an equivalent card and run a VRAM stress test (MemTest Vulkan, OCCT VRAM); dies that pass stable, long-duration testing price as good stock. Third, lot consistency — mixed-speed and mixed-lot dies are sorted to their own grade. Three conditions are downgraded on sight: sanded parts, remarked parts, and "soft failure" dies — cold solder or long-term full-load overheating, which is especially common on mining-card stock — keep them on their own line and never quote them at gaming-card good-die pricing.

Three Supply Sources: Second-Wave Mining Cards, Upgrade Cycles and Whole-Card Replacement

Second-wave mining cards and cybercafe turnover: retiring RTX 3060/3070 mining cards and RX 6600XT/6700XT cybercafe machines yield 8-12 dies each — the highest volume
Gaming-card upgrade cycles: RTX 2060/3060/4060 owners moving to RTX 50-series — the freshest stock with the lowest cold-solder rate and the highest good-die ratio
OEM systems and warranty spares: boards returned from gaming laptops and workstations are clean but often contain one failed die among many — every die must be tested individually

Trends: GDDR7 Ramps, and GDDR6 Enters Its "Repair Golden Age"

Both ends of VRAM recycling are moving the right way in 2026. On the supply side, with RTX 50-series fully on GDDR7, Samsung, Micron and SK Hynix are steadily winding down GDDR6 production — harvested stock of EOL parts is rising, not falling, in graphics-card repair channels. On the demand side, hundreds of millions of RTX 30/40 and RX 6000/7000 cards remain in service, and VRAM cold-solder failure is the #1 repair failure mode — repair shops need same-speed harvested dies steadily and pay a premium for verified good stock. 16Gbps high-speed parts are the best-selling tier right now — wide repair margins, high pass rates and fast turnover; GDDR6X 24Gbps flagship dies command the highest unit price but move slowly, so they belong on locked-channel sales. Pulling VRAM out of "whole-card residual value" and pricing it by speed grade is the single most profitable improvement in graphics-card recycling.

Advice for Recyclers

Grade by speed tier: quote five tiers separately — 12/14/16-18/19-21/24Gbps — price unreadable markings at the low tier, never with blended quotes
Test before shipping: deliver power-on plus stress-test reports; graphics-card repair shops pay 10-20% more for verifiable good dies
Keep mining-card stock separate: sort and test mining pulls on their own line instead of one gaming-card good-die tier
Watch gaming-laptop pulls: laptop VRAM is mostly low-voltage, lower-speed silicon — volume is smaller than desktop cards and the price gap is obvious, so sort them apart at intake

MemoryRecycle runs full testing and grading lines for GDDR6/GDDR6X, DDR4/DDR5, eMMC, UFS and NAND dies covering Samsung, Micron, SK Hynix, Kioxia, GigaDevice and YMTC. Graphics-card dismantlers, mining-card clearance channels, cybercafe replacement programs and volume sellers all get free evaluation, bench testing, graded pricing and premium buyback — let's cash out a graphics card one die at a time.