NovaStar NV7508 receiving card for 8 HUB75E connections
The NovaStar NV7508 is an LED receiving card with eight standard HUB75E connectors and support for up to 16 groups of parallel RGB data. It distributes the controller’s display data to cabinet modules and provides image adjustment, mapping and maintenance functions.
Choose its loading limit by both source bit depth and module driver IC. The values below come from the Chinese NV7508 specification V1.0.2, dated August 5, 2025, which states the capacities when used with an M3 controller. Confirm the board revision, firmware and actual system configuration before purchase.
NV7508 pixel loading with an M3 controller
| Module driver IC | 8-bit source | 10-bit source |
|---|---|---|
| PWM driver IC | 512 × 512 | 512 × 256 |
| Common driver IC | 512 × 384 | 512 × 192 |
A 10-bit source therefore has a different documented load from an 8-bit source. Do not extend these M3-based figures to every controller or module arrangement. The 60 Hz condition describes source/loading operation; it does not define the LED module’s refresh rate.
Electrical and physical specifications
| Module connectors / RGB data | 8 HUB75E / up to 16 parallel groups |
|---|---|
| Input voltage | DC 3.8–5.5 V |
| Rated current / consumption | 0.5 A / 2.5 W |
| Board dimensions | 95.3 × 109.4 × 19.3 mm |
| Net weight | 70.2 g per receiving card |
| Operating conditions | −20°C to +70°C; 10–90% RH, non-condensing |
Current and power consumption vary with product settings, environment and use. Check the power supply, mounting drawing and connector access against the existing cabinet.

Image adjustment and controller requirements
- Color and calibration: standard and custom color gamuts, 18bit+, pixel-level brightness and chroma calibration, seam correction and multi-batch adjustment support image tuning. Pixel calibration requires NovaStar’s calibration system.
- Low latency: the specification describes latency down to one frame at the receiving card for LED modules whose driver IC has built-in RAM. This is a receiver-stage condition, not an end-to-end system latency guarantee.
- 3D and RGB gamma: 3D needs a supporting controller. Individual RGB gamma adjustment needs a supporting controller together with NovaLCT.
- Rotation: image rotation in 90° increments is documented: 0°, 90°, 180° and 270°.
Mapping and recovery for cabinet maintenance
Data-group mapping shows group locations inside a cabinet. Mapping 1.1 identifies controller, Ethernet-port and receiver numbers to help trace the physical wiring. Temperature, voltage and bit-error monitoring assist diagnosis, while firmware and configuration readback allow maintenance files to be saved locally.
Loop backup uses primary and backup cable paths between the controller and receivers. Dual program backup retains two firmware copies for recovery during an abnormal firmware update. These functions address different faults. V1.0.2 explicitly removes configuration-parameter dual backup from the feature list; do not assume that function is available.
NV7508 buying and replacement questions
Does 18bit+ mean the 10-bit loading limit can be ignored?
No. The 18bit+ image-processing feature does not replace the separate 8-bit and 10-bit loading conditions in the specification. Select the capacity for the actual source and driver IC.
Are eight HUB75E ports the same as sixteen RGB data groups?
No. Eight is the physical connector count; sixteen is the maximum parallel RGB group count. Check both when matching ribbon cables and module data.
Can another eight-port receiver replace NV7508 directly?
Connector count alone is insufficient. Compare pin assignments, scan mode, driver IC, mounting dimensions, controller support and saved configuration. Browse our LED receiving cards after confirming the cabinet requirements.
What should I prepare before ordering a replacement?
Back up the working receiver parameters and calibration files. Then contact EagerLED with board photos, the controller model, source bit depth, cabinet pixel dimensions and module driver IC for a compatibility check.
Technical reference: NovaStar NV7508 specification PDF in Chinese, V1.0.2. It includes the version history, pin definitions and mounting drawing.




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