GPU database reference
Verified catalog recordAMD Radeon HD 7990
AMD · Southern Islands(HD 7900) · Radeon HD 7990
AMD Radeon HD 7990 graphics reference with normalized architecture, compute, memory, clocks, PCIe, display, media, power, and physical specifications where verified data exists.
- VRAM
- 3 GB GDDR5
- Boost clock
- 1.0 GHz
- PCI Express
- PCIe 3.0 x16
- Board power
- 375 W
Benchmark
Measured performance reference
Benchmark results are comparable only within the exact same test. They do not represent total product quality.
3DMark Time Spy
GPU synthetic graphics benchmark
#129 of 156
Rank among GPUs with a 3DMark Time Spy score in the CTT dataset.
Technical data
Specifications
Only fields backed by the current normalized record are rendered; missing values stay absent rather than becoming N/A grids.
Overview
| Manufacturer | AMD |
|---|---|
| Family | Southern Islands(HD 7900) |
| Launch date | 2013-04-24 |
Architecture
| Architecture | GCN 1.0 |
|---|---|
| Generation | Southern Islands(HD 7900) |
| GPU / chip | Malta |
| Foundry | TSMC |
| Process | 28 nm |
Compute
| Compute units | 32 CUs |
|---|---|
| Shader processors | 4096 |
Memory
| VRAM | 3 GB |
|---|---|
| Memory type | GDDR5 |
| Memory bus | 384 bit |
| Memory bandwidth | 288.0 GB/s |
Clocks
| Base clock | 0.95 GHz |
|---|---|
| Boost clock | 1.0 GHz |
| Memory clock | 1.50 GHz |
PCIe
| Bus interface | PCIe 3.0 x16 |
|---|
Display
| Display outputs | 1x DVI, 4x mini-DisplayPort 1.2 |
|---|
Power
| Board power | 375 W |
|---|---|
| Suggested PSU | 750 W |
| Power connectors | 2x 8-pin |
Physical
| Reference dimensions | 304 mm × 38 mm × — |
|---|---|
| Slot width | Dual-slot |
Hardware navigation
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Sources
Specification provenance
No public source record is available.
Related
Continue from here
Useful next steps selected from the same technical reference and publication system.
Technical guide
GPU VRAM Capacity Explained: Textures, Resolution, Ray Tracing, Memory Budgets, and Out-of-VRAM Behavior
Understand what GPU VRAM stores, how textures, render targets, resolution, ray tracing, residency budgets, and paging affect capacity pressure, and why VRAM size alone does not determine performance.
Technical guide
4K Gaming PC Build Guide: GPU, VRAM, CPU Balance, Upscaling, Power, Cooling, and Display Outputs
Plan a 4K gaming PC around the display and games first, then validate GPU class, VRAM, CPU balance, upscaling, power, cooling, case fit, and the full monitor connection path.
Tool
DDR Memory Latency Calculator
Convert DDR data rate and CAS latency cycles into CAS timing in nanoseconds.
Tool
PCIe Link Bandwidth Calculator
Calculate theoretical one-direction PCIe link bandwidth by generation and lane width.